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Steven Rostedt
b6e5d971fc tracing: Check for printable characters when printing field dyn strings 
When the "fields" option is enabled, it prints each trace event field
based on its type. But a dynamic array and a dynamic string can both have
a "char *" type. Printing it as a string can cause escape characters to be
printed and mess up the output of the trace.

For dynamic strings, test if there are any non-printable characters, and
if so, print both the string with the non printable characters as '.', and
the print the hex value of the array.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.929243047@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:59 -04:00
Steven Rostedt
64b627c8da tracing: Add parsing of flags to the sys_enter_openat trace event 
Add some logic to give the openat system call trace event a bit more human
readable information:

   syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7f0053dc121c "/etc/ld.so.cache", flags: O_RDONLY|O_CLOEXEC, mode: 0000

The above is output from "perf script" and now shows the flags used by the
openat system call.

Since the output from tracing is in the kernel, it can also remove the
mode field when not used (when flags does not contain O_CREATE|O_TMPFILE)

   touch-1185    [002] ...1.  1291.690154: sys_openat(dfd: 4294967196, filename: 139785545139344 "/usr/lib/locale/locale-archive", flags: O_RDONLY|O_CLOEXEC)
   touch-1185    [002] ...1.  1291.690504: sys_openat(dfd: 18446744073709551516, filename: 140733603151330 "/tmp/x", flags: O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, mode: 0666)

As system calls have a fixed ABI, their trace events can be extended. This
currently only updates the openat system call, but others may be extended
in the future.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.763161484@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:59 -04:00
Steven Rostedt
32e0f607ac tracing: Add trace_seq_pop() and seq_buf_pop() 
In order to allow an interface to remove an added character from the
trace_seq and seq_buf descriptors, add helper functions trace_seq_pop()
and seq_buf_pop().

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.594898736@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:59 -04:00
Steven Rostedt
e77ad6da90 tracing: Show printable characters in syscall arrays 
When displaying the contents of the user space data passed to the kernel,
instead of just showing the array values, also print any printable
content.

Instead of just:

  bash-1113    [003] .....  3433.290654: sys_write(fd: 2, buf: 0x555a8deeddb0 (72:6f:6f:74:40:64:65:62:69:61:6e:2d:78:38:36:2d:36:34:3a:7e:23:20), count: 0x16)

Display:

  bash-1113    [003] .....  3433.290654: sys_write(fd: 2, buf: 0x555a8deeddb0 (72:6f:6f:74:40:64:65:62:69:61:6e:2d:78:38:36:2d:36:34:3a:7e:23:20) "root@debian-x86-64:~# ", count: 0x16)

This only affects tracing and does not affect perf, as this only updates
the output from the kernel. The output from perf is via user space. This
may change by an update to libtraceevent that will then update perf to
have this as well.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.429422865@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:59 -04:00
Steven Rostedt
299ea67e6a tracing: Add a config and syscall_user_buf_size file to limit amount written 
When a system call that can copy user space addresses into the ring
buffer, it can copy up to 511 bytes of data. This can waste precious ring
buffer space if the user isn't interested in the output. Add a new file
"syscall_user_buf_size" that gets initialized to a new config
CONFIG_SYSCALL_BUF_SIZE_DEFAULT that defaults to 63.

The config also is used to limit how much perf can read from user space.

Also lower the max down to 165, as this isn't to record everything that a
system call may be passing through to the kernel. 165 is more than enough.

The reason for 165 is because adding one for the nul terminating byte, as
well as possibly needing to append the "..." string turns it into 170
bytes. As this needs to save up to 3 arguments and 3 * 170 is 510 which
fits nicely in 512 bytes (a power of 2).

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.260068913@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:59 -04:00
Steven Rostedt
baa031b7bd tracing: Allow syscall trace events to read more than one user parameter 
Allow more than one field of a syscall trace event to read user space.
Build on top of the user_mask by allowing more than one bit to be set that
corresponds to the @args array of the syscall metadata. For each argument
in the @args array that is to be read, it will have a dynamic array/string
field associated to it.

Note that multiple fields to be read from user space is not supported if
the user_arg_size field is set in the syscall metada. That field can only
be used if only one field is being read from user space as that field is a
number representing the size field of the syscall event that holds the
size of the data to read from user space. It becomes ambiguous if the
system call reads more than one field. Currently this is not an issue.

If a syscall event happens to enable two events to read user space and
sets the user_arg_size field, it will trigger a warning at boot and the
user_arg_size field will be cleared.

The per CPU buffer that is used to read the user space addresses is now
broken up into 3 sections, each of 168 bytes. The reason for 168 is that
it is the biggest portion of 512 bytes divided by 3 that is 8 byte aligned.

The max amount copied into the ring buffer from user space is now only 128
bytes, which is plenty. When reading user space, it still reads 167
(168-1) bytes and uses the remaining to know if it should append the extra
"..." to the end or not.

This will allow the event to look like this:

  sys_renameat2(olddfd: 0xffffff9c, oldname: 0x7ffe02facdff "/tmp/x", newdfd: 0xffffff9c, newname: 0x7ffe02face06 "/tmp/y", flags: 1)

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231148.095789277@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
011ea0501d tracing: Display some syscall arrays as strings 
Some of the system calls that read a fixed length of memory from the user
space address are not arrays but strings. Take a bit away from the nb_args
field in the syscall meta data to use as a flag to denote that the system
call's user_arg_size is being used as a string. The nb_args should never
be more than 6, so 7 bits is plenty to hold that number. When the
user_arg_is_str flag that, when set, will display the data array from the
user space address as a string and not an array.

This will allow the output to look like this:

  sys_sethostname(name: 0x5584310eb2a0 "debian", len: 6)

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.930550359@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
b4f7624cfc tracing: Have system call events record user array data 
For system call events that have a length field, add a "user_arg_size"
parameter to the system call meta data that denotes the index of the args
array that holds the size of arg that the user_mask field has a bit set
for.

The "user_mask" has a bit set that denotes the arg that points to an array
in the user space address space and if a system call event has the
user_mask field set and the user_arg_size set, it will then record the
content of that address into the trace event, up to the size defined by
SYSCALL_FAULT_BUF_SZ - 1.

This allows the output to look like:

  sys_write(fd: 0xa, buf: 0x5646978d13c0 (01:00:05:00:00:00:00:00:01:87:55:89:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00), count: 0x20)

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.763528474@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
2e82e256df perf: tracing: Have perf system calls read user space 
Allow some of the system call events to read user space buffers. Instead
of just showing the pointer into user space, allow perf events to also
record the content of those pointers. For example:

  # perf record -e syscalls:sys_enter_openat ls /usr/bin
  [..]
  # perf script
      ls    1024 [005]    52.902721: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dbae321c "/etc/ld.so.cache", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.902899: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dbaae140 "/lib/x86_64-linux-gnu/libselinux.so.1", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.903471: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dbaae690 "/lib/x86_64-linux-gnu/libcap.so.2", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.903946: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dbaaebe0 "/lib/x86_64-linux-gnu/libc.so.6", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.904629: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dbaaf110 "/lib/x86_64-linux-gnu/libpcre2-8.so.0", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.906985: syscalls:sys_enter_openat: dfd: 0xffffffffffffff9c, filename: 0x7fc1dba92904 "/proc/filesystems", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.907323: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x7fc1dba19490 "/usr/lib/locale/locale-archive", flags: 0x00080000, mode: 0x00000000
      ls    1024 [005]    52.907746: syscalls:sys_enter_openat: dfd: 0xffffff9c, filename: 0x556fb888dcd0 "/usr/bin", flags: 0x00090800, mode: 0x00000000

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.593925979@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
bd1b80fba7 perf: tracing: Simplify perf_sysenter_enable/disable() with guards 
Use guard(mutex)(&syscall_trace_lock) for perf_sysenter_enable() and
perf_sysenter_disable() as well as for the perf_sysexit_enable() and
perf_sysexit_disable(). This will make it easier to update these functions
with other code that has early exit handling.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.429583335@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
a544d9a66b tracing: Have syscall trace events read user space string 
As of commit 654ced4a13 ("tracing: Introduce tracepoint_is_faultable()")
system call trace events allow faulting in user space memory. Have some of
the system call trace events take advantage of this.

Use the trace_user_fault_read() logic to read the user space buffer from
user space and instead of just saving the pointer to the buffer in the
system call event, also save the string that is passed in.

The syscall event has its nb_args shorten from an int to a short (where
even u8 is plenty big enough) and the freed two bytes are used for
"user_mask".  The new "user_mask" field is used to store the index of the
"args" field array that has the address to read from user space. This
value is set to 0 if the system call event does not need to read user
space for a field. This mask can be used to know if the event may fault or
not. Only one bit set in user_mask is supported at this time.

This allows the output to look like this:

 sys_access(filename: 0x7f8c55368470 "/etc/ld.so.preload", mode: 4)
 sys_execve(filename: 0x564ebcf5a6b8 "/usr/bin/emacs", argv: 0x7fff357c0300, envp: 0x564ebc4a4820)

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.261867956@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:58 -04:00
Steven Rostedt
a9f1687264 tracing: Make trace_user_fault_read() exposed to rest of tracing 
The write to the trace_marker file is a critical section where it cannot
take locks nor allocate memory. To read from user space, it allocates a per
CPU buffer when the trace_marker file is opened, and then when the write
system call is performed, it uses the following method to read from user
space:

	preempt_disable();
	buffer = per_cpu_ptr(cpu_buffers, cpu);
	do {
		cnt = nr_context_switches_cpu();
		migrate_disable();
		preempt_enable();
		ret = copy_from_user(buffer, ptr, len);
		preempt_disable();
		migrate_enable();
	} while (!ret && cnt != nr_context_switches_cpu());
	if (!ret)
		ring_buffer_write(buffer);
	preempt_enable();

It records the number of context switches for the current CPU, enables
preemption, copies from user space, disable preemption and then checks if
the number of context switches changed. If it did not, then the buffer is
valid, otherwise the buffer may have been corrupted and the read from user
space must be tried again.

The system call trace events are now faultable and have the same
restrictions as the trace_marker write. For system calls to read the user
space buffer (for example to read the file of the openat system call), it
needs the same logic. Instead of copying the code over to the system call
trace events, make the code generic to allow the system call trace events to
use the same code. The following API is added internally to the tracing sub
system (these are only exposed within the tracing subsystem and not to be
used outside of it):

  trace_user_fault_init() - initializes a trace_user_buf_info descriptor
       that will allocate the per CPU buffers to copy from user space into.

  trace_user_fault_destroy() - used to free the allocations made by
       trace_user_fault_init().

  trace_user_fault_get() - update the ref count of the info descriptor to
       allow more than one user to use the same descriptor.

  trace_user_fault_put() - decrement the ref count.

  trace_user_fault_read() - performs the above action to read user space
      into the per CPU buffer. The preempt_disable() is expected before
      calling this function and preemption must remain disabled while the
      buffer returned is in use.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Takaya Saeki <takayas@google.com>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ian Rogers <irogers@google.com>
Cc: Douglas Raillard <douglas.raillard@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/20251028231147.096570057@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-10-28 20:10:57 -04:00
Linus Torvalds
dcb6fa37fd Linux 6.18-rc3 v6.18-rc3 2025-10-26 15:59:49 -07:00
Linus Torvalds
4bb1f7e19c Char/Misc driver fixes for 6.18-rc3 
Here are some small char/misc/android driver fixes for 6.18-rc3 for
 reported issues.  Included in here are:
   - rust binder fixes for reported issues
   - mei device id addition
   - mei driver fixes
   - comedi bugfix
   - most usb driver bugfixes
   - fastrpc memory leak fix
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc/android driver fixes for 6.18-rc3 for
  reported issues. Included in here are:

   - rust binder fixes for reported issues

   - mei device id addition

   - mei driver fixes

   - comedi bugfix

   - most usb driver bugfixes

   - fastrpc memory leak fix

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  most: usb: hdm_probe: Fix calling put_device() before device initialization
  most: usb: Fix use-after-free in hdm_disconnect
  binder: remove "invalid inc weak" check
  mei: txe: fix initialization order
  comedi: fix divide-by-zero in comedi_buf_munge()
  mei: late_bind: Fix -Wincompatible-function-pointer-types-strict
  misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup
  mei: me: add wildcat lake P DID
  misc: amd-sbi: Clarify that this is a BMC driver
  nvmem: rcar-efuse: add missing MODULE_DEVICE_TABLE
  binder: Fix missing kernel-doc entries in binder.c
  rust_binder: report freeze notification only when fully frozen
  rust_binder: don't delete FreezeListener if there are pending duplicates
  rust_binder: freeze_notif_done should resend if wrong state
  rust_binder: remove warning about orphan mappings
  rust_binder: clean `clippy::mem_replace_with_default` warning
 2025-10-26 10:33:46 -07:00
Linus Torvalds
40282418e1 staging driver fixes for 6.18-rc3 
Here are some small staging driver fixes for the gpib subsystem to
 resolve some reported issues.  Included in here are:
   - memory leak fixes
   - error code fixes
   - proper protocol fixes
 
 All of these have been in linux-next for almost 2 weeks now with no
 reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg KH:
 "Here are some small staging driver fixes for the gpib subsystem to
  resolve some reported issues. Included in here are:

   - memory leak fixes

   - error code fixes

   - proper protocol fixes

  All of these have been in linux-next for almost 2 weeks now with no
  reported issues"

* tag 'staging-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: gpib: Fix device reference leak in fmh_gpib driver
  staging: gpib: Return -EINTR on device clear
  staging: gpib: Fix sending clear and trigger events
  staging: gpib: Fix no EOI on 1 and 2 byte writes
 2025-10-26 10:29:45 -07:00
Linus Torvalds
aa6085a067 tty/serial driver bugfixes for 6.18-rc3 
Here are some small tty and serial driver fixes for reported issues.
 Included in here are:
   - sh-sci serial driver fixes
   - 8250_dw and _mtk driver fixes
   - sc16is7xx driver bugfix
   - new 8250_exar device ids added
 
 All of these have been in linux-next this past week with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are some small tty and serial driver fixes for reported issues.
  Included in here are:

   - sh-sci serial driver fixes

   - 8250_dw and _mtk driver fixes

   - sc16is7xx driver bugfix

   - new 8250_exar device ids added

  All of these have been in linux-next this past week with no reported
  issues"

* tag 'tty-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_mtk: Enable baud clock and manage in runtime PM
  serial: 8250_dw: handle reset control deassert error
  dt-bindings: serial: sh-sci: Fix r8a78000 interrupts
  serial: sc16is7xx: remove useless enable of enhanced features
  serial: 8250_exar: add support for Advantech 2 port card with Device ID 0x0018
  tty: serial: sh-sci: fix RSCI FIFO overrun handling
 2025-10-26 10:24:39 -07:00
Linus Torvalds
6190d0fa18 USB driver fixes for 6.18-rc3 
Here are some small USB driver fixes and new device ids for 6.18-rc3.
 Included in here are:
   - new option serial driver device ids added
   - dt bindings fixes for numerous platforms
   - xhci bugfixes for many reported regressions
   - usbio dependency bugfix
   - dwc3 driver fix
   - raw-gadget bugfix
 
 All of these have been in linux-next this week with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB driver fixes from Greg KH:
 "Here are some small USB driver fixes and new device ids for 6.18-rc3.
  Included in here are:

   - new option serial driver device ids added

   - dt bindings fixes for numerous platforms

   - xhci bugfixes for many reported regressions

   - usbio dependency bugfix

   - dwc3 driver fix

   - raw-gadget bugfix

  All of these have been in linux-next this week with no reported issues"

* tag 'usb-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: serial: option: add Telit FN920C04 ECM compositions
  USB: serial: option: add Quectel RG255C
  tcpm: switch check for role_sw device with fw_node
  usb/core/quirks: Add Huawei ME906S to wakeup quirk
  usb: raw-gadget: do not limit transfer length
  USB: serial: option: add UNISOC UIS7720
  xhci: dbc: enable back DbC in resume if it was enabled before suspend
  xhci: dbc: fix bogus 1024 byte prefix if ttyDBC read races with stall event
  usb: xhci-pci: Fix USB2-only root hub registration
  dt-bindings: usb: qcom,snps-dwc3: Fix bindings for X1E80100
  usb: misc: Add x86 dependency for Intel USBIO driver
  dt-bindings: usb: switch: split out ports definition
  usb: dwc3: Don't call clk_bulk_disable_unprepare() twice
  dt-bindings: usb: dwc3-imx8mp: dma-range is required only for imx8mp
 2025-10-26 10:21:13 -07:00
Linus Torvalds
dbfc6422a3 - Remove dead code leftovers after a recent mitigations cleanup which fail 
a Clang build
 
 - Make sure a Retbleed mitigation message is printed only when necessary
 
 - Correct the last Zen1 microcode revision for which Entrysign sha256 check is
   needed
 
 - Fix a NULL ptr deref when mounting the resctrl fs on a system which supports
   assignable counters but where L3 total and local bandwidth monitoring has
   been disabled at boot
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Merge tag 'x86_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Remove dead code leftovers after a recent mitigations cleanup which
   fail a Clang build

 - Make sure a Retbleed mitigation message is printed only when
   necessary

 - Correct the last Zen1 microcode revision for which Entrysign sha256
   check is needed

 - Fix a NULL ptr deref when mounting the resctrl fs on a system which
   supports assignable counters but where L3 total and local bandwidth
   monitoring has been disabled at boot

* tag 'x86_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/bugs: Remove dead code which might prevent from building
  x86/bugs: Qualify RETBLEED_INTEL_MSG
  x86/microcode: Fix Entrysign revision check for Zen1/Naples
  x86,fs/resctrl: Fix NULL pointer dereference with events force-disabled in mbm_event mode
 2025-10-26 09:57:18 -07:00
Linus Torvalds
5fee0dafba - Restore the original buslock locking in a couple of places in the irq core 
subsystem after a rework
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Merge tag 'irq_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fixes from Borislav Petkov:

 - Restore the original buslock locking in a couple of places in the irq
   core subsystem after a rework

* tag 'irq_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/manage: Add buslock back in to enable_irq()
  genirq/manage: Add buslock back in to __disable_irq_nosync()
  genirq/chip: Add buslock back in to irq_set_handler()
 2025-10-26 09:54:36 -07:00
Linus Torvalds
af8159515f - Fix x32 build due to wrong format specifier on that sub-arch 
- Add one more Rust noreturn function to objtool's list
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Merge tag 'objtool_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fixes from Borislav Petkov:

 - Fix x32 build due to wrong format specifier on that sub-arch

 - Add one more Rust noreturn function to objtool's list

* tag 'objtool_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Fix failure when being compiled on x32 system
  objtool/rust: add one more `noreturn` Rust function
 2025-10-26 09:44:36 -07:00
Linus Torvalds
1bc9743b64 - Make sure a CFS runqueue on a throttled hierarchy has its PELT clock 
throttled otherwise task movement and manipulation would lead to dangling
   cfs_rq references and an eventual crash
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Merge tag 'sched_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fix from Borislav Petkov:

 - Make sure a CFS runqueue on a throttled hierarchy has its PELT clock
   throttled otherwise task movement and manipulation would lead to
   dangling cfs_rq references and an eventual crash

* tag 'sched_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Start a cfs_rq on throttled hierarchy with PELT clock throttled
 2025-10-26 09:42:19 -07:00
Linus Torvalds
7ea5092f52 - Do not create more than eight (max supported) AUX clocks sysfs hierarchies 
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Merge tag 'timers_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fix from Borislav Petkov:

 - Do not create more than eight (max supported) AUX clocks sysfs
   hierarchies

* tag 'timers_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timekeeping: Fix aux clocks sysfs initialization loop bound
 2025-10-26 09:40:16 -07:00
Linus Torvalds
72761a7e31 Driver core fixes for 6.18-rc3 
- In Device::parent(), do not make any assumptions on the device
     context of the parent device.
 
   - Check visibility before changing ownership of a sysfs attribute
     group.
 
   - In topology_parse_cpu_capacity(), replace an incorrect usage of
     PTR_ERR_OR_ZERO() with IS_ERR_OR_NULL().
 
   - In devcoredump, fix a circular locking dependency between
     struct devcd_entry::mutex and kernfs.
 
   - Do not warn about a pending fw_devlink sync state.
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Merge tag 'driver-core-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core fixes from Danilo Krummrich:

 - In Device::parent(), do not make any assumptions on the device
   context of the parent device

 - Check visibility before changing ownership of a sysfs attribute
   group

 - In topology_parse_cpu_capacity(), replace an incorrect usage of
   PTR_ERR_OR_ZERO() with IS_ERR_OR_NULL()

 - In devcoredump, fix a circular locking dependency between
   struct devcd_entry::mutex and kernfs

 - Do not warn about a pending fw_devlink sync state

* tag 'driver-core-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
  arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()
  rust: device: fix device context of Device::parent()
  sysfs: check visibility before changing group attribute ownership
  devcoredump: Fix circular locking dependency with devcd->mutex.
  driver core: fw_devlink: Don't warn about sync_state() pending
 2025-10-25 11:03:46 -07:00
Linus Torvalds
818444a61b firewire fixes for 6.18-rc3 
A small collection of FireWire fixes. This includes collections to sparse
 and API documentation.
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Merge tag 'firewire-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull firewire fixes from Takashi Sakamoto:
 "A small collection of FireWire fixes. This includes corrections to
  sparse and API documentation"

* tag 'firewire-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: init_ohci1394_dma: add missing function parameter documentation
  firewire: core: fix __must_hold() annotation
 2025-10-25 10:58:32 -07:00
Linus Torvalds
9bb956508c RISC-V updates for v6.18-rc3 
Several RISC-V fixes for v6.18-rc3:
 
 - Close a race during boot between userspace vDSO usage and some
   late-initialized vDSO data
 
 - Improve performance on systems with non-CPU-cache-coherent
   DMA-capable peripherals by enabling write combining on
   pgprot_dmacoherent() allocations
 
 - Add human-readable detail for RISC-V IPI tracing
 
 - Provide more information to zsmalloc on 64-bit RISC-V to improve
   allocation
 
 - Silence useless boot messages about CPUs that have been disabled in
   DT
 
 - Resolve some compiler and smatch warnings and remove a redundant macro
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Merge tag 'riscv-for-linus-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:

 - Close a race during boot between userspace vDSO usage and some
   late-initialized vDSO data

 - Improve performance on systems with non-CPU-cache-coherent
   DMA-capable peripherals by enabling write combining on
   pgprot_dmacoherent() allocations

 - Add human-readable detail for RISC-V IPI tracing

 - Provide more information to zsmalloc on 64-bit RISC-V to improve
   allocation

 - Silence useless boot messages about CPUs that have been disabled in
   DT

 - Resolve some compiler and smatch warnings and remove a redundant
   macro

* tag 'riscv-for-linus-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: hwprobe: avoid uninitialized variable use in hwprobe_arch_id()
  riscv: cpufeature: avoid uninitialized variable in has_thead_homogeneous_vlenb()
  riscv: hwprobe: Fix stale vDSO data for late-initialized keys at boot
  riscv: add a forward declaration for cpuinfo_op
  RISC-V: Don't print details of CPUs disabled in DT
  riscv: Remove the PER_CPU_OFFSET_SHIFT macro
  riscv: mm: Define MAX_POSSIBLE_PHYSMEM_BITS for zsmalloc
  riscv: Register IPI IRQs with unique names
  ACPI: RIMT: Fix unused function warnings when CONFIG_IOMMU_API is disabled
  RISC-V: Define pgprot_dmacoherent() for non-coherent devices
 2025-10-25 09:35:26 -07:00
Linus Torvalds
27c0b5c4f6 xfs: fixes for v6.18-rc3 
Signed-off-by: Carlos Maiolino <cem@kernel.org>
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Merge tag 'xfs-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Carlos Maiolino:
 "The main highlight here is a fix for a bug brought in by the removal
  of attr2 mount option, where some installations might actually have
  'attr2' explicitly configured in fstab preventing system to boot by
  not being able to remount the rootfs as RW.

  Besides that there are a couple fix to the zonefs implementation,
  changing XFS_ONLINE_SCRUB_STATS to depend on DEBUG_FS (was select
  before), and some other minor changes"

* tag 'xfs-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix locking in xchk_nlinks_collect_dir
  xfs: loudly complain about defunct mount options
  xfs: always warn about deprecated mount options
  xfs: don't set bt_nr_sectors to a negative number
  xfs: don't use __GFP_NOFAIL in xfs_init_fs_context
  xfs: cache open zone in inode->i_private
  xfs: avoid busy loops in GCD
  xfs: XFS_ONLINE_SCRUB_STATS should depend on DEBUG_FS
  xfs: do not tightly pack-write large files
  xfs: Improve CONFIG_XFS_RT Kconfig help
 2025-10-25 09:31:13 -07:00
Linus Torvalds
566771afc7 Seven ksmbd server fixes 
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Merge tag 'v6.18-rc2-smb-server-fixes' of git://git.samba.org/ksmbd

Pull smb server fixes from Steve French:
 "smbdirect (RDMA) fixes in order avoid potential submission queue
  overflows:

   - free transport teardown fix

   - credit related fixes (five server related, one client related)"

* tag 'v6.18-rc2-smb-server-fixes' of git://git.samba.org/ksmbd:
  smb: server: let free_transport() wait for SMBDIRECT_SOCKET_DISCONNECTED
  smb: client: make use of smbdirect_socket.send_io.lcredits.*
  smb: server: make use of smbdirect_socket.send_io.lcredits.*
  smb: server: simplify sibling_list handling in smb_direct_flush_send_list/send_done
  smb: server: smb_direct_disconnect_rdma_connection() already wakes all waiters on error
  smb: smbdirect: introduce smbdirect_socket.send_io.lcredits.*
  smb: server: allocate enough space for RW WRs and ib_drain_qp()
 2025-10-24 18:50:15 -07:00
Andy Shevchenko
53abe3e1c1 sched: Remove never used code in mm_cid_get() 
Clang is not happy with set but unused variable (this is visible
with `make W=1` build:

  kernel/sched/sched.h:3744:18: error: variable 'cpumask' set but not used [-Werror,-Wunused-but-set-variable]

It seems like the variable was never used along with the assignment
that does not have side effects as far as I can see.  Remove those
altogether.

Fixes: 223baf9d17 ("sched: Fix performance regression introduced by mm_cid")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2025-10-24 16:55:46 -07:00
Linus Torvalds
3d08a425d2 drm-fixes for 6.18-rc3 
- drm_panic: bunch of size calculation fixes
 - pantor: fix kernel panic on partial gpu va unmap
 - rockchip: hdmi hotplug setup fix
 - amdgpu: dp mst, dc/display fixes
 - i915: fix panic structure leak
 - xe: madvise uapi fix, wq alloc error, vma flag handling fix
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Merge tag 'drm-fixes-2025-10-24' of https://gitlab.freedesktop.org/drm/kernel

Pull drm fixes from Simona Vetter:
 "Very quiet, all just small stuff and nothing scary pending to my
  knowledge:

   - drm_panic: bunch of size calculation fixes

   - pantor: fix kernel panic on partial gpu va unmap

   - rockchip: hdmi hotplug setup fix

   - amdgpu: dp mst, dc/display fixes

   - i915: fix panic structure leak

   - xe: madvise uapi fix, wq alloc error, vma flag handling fix"

* tag 'drm-fixes-2025-10-24' of https://gitlab.freedesktop.org/drm/kernel:
  drm/xe: Check return value of GGTT workqueue allocation
  drm/amd/display: use GFP_NOWAIT for allocation in interrupt handler
  drm/amd/display: increase max link count and fix link->enc NULL pointer access
  drm/amd/display: Fix NULL pointer dereference
  drm/panic: Fix 24bit pixel crossing page boundaries
  drm/panic: Fix divide by 0 if the screen width < font width
  drm/panic: Fix kmsg text drawing rectangle
  drm/panic: Fix qr_code, ensure vmargin is positive
  drm/panic: Fix overlap between qr code and logo
  drm/panic: Fix drawing the logo on a small narrow screen
  drm/xe/uapi: Hide the madvise autoreset behind a VM_BIND flag
  drm/xe: Retain vma flags when recreating and splitting vmas for madvise
  drm/i915/panic: fix panic structure allocation memory leak
  drm/panthor: Fix kernel panic on partial unmap of a GPU VA region
  drm/rockchip: dw_hdmi: use correct SCLIN mask for RK3228
 2025-10-24 16:49:16 -07:00
Linus Torvalds
31009296f8 pci-v6.18-fixes-3 
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Merge tag 'pci-v6.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull pci fixes from Bjorn Helgaas:

 - Add DWC custom pci_ops for the root bus instead of overwriting the
   DBI base address, which broke drivers that rely on the DBI address
   for iATU programming; fixes an FU740 probe regression (Krishna
   Chaitanya Chundru)

 - Revert qcom ECAM enablement, which is rendered unnecessary by the DWC
   custom pci_ops (Krishna Chaitanya Chundru)

 - Fix longstanding MIPS Malta resource registration issues to avoid
   exposing them when the next commit fixes the boot failure (Maciej W.
   Rozycki)

 - Use pcibios_align_resource() on MIPS Malta to fix boot failure caused
   by using the generic pci_enable_resources() (Ilpo Järvinen)

 - Enable only ASPM L0s and L1, not L1 PM Substates, for devicetree
   platforms because we lack information required to configure L1
   Substates; fixes regressions on powerpc and rockchip. A qcom
   regression (L1 Substates no longer enabled) remains and will be
   addressed next (Bjorn Helgaas)

* tag 'pci-v6.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI/ASPM: Enable only L0s and L1 for devicetree platforms
  MIPS: Malta: Use pcibios_align_resource() to block io range
  MIPS: Malta: Fix PCI southbridge legacy resource reservations
  MIPS: Malta: Fix keyboard resource preventing i8042 driver from registering
  Revert "PCI: qcom: Prepare for the DWC ECAM enablement"
  PCI: dwc: Use custom pci_ops for root bus DBI vs ECAM config access
 2025-10-24 16:43:08 -07:00
Nirbhay Sharma
73ba88fb04 firewire: init_ohci1394_dma: add missing function parameter documentation 
Add missing kernel-doc parameter descriptions for five functions
in init_ohci1394_dma.c to fix documentation warnings when building
with W=1.

This patch addresses the following warnings:
- init_ohci1394_wait_for_busresets: missing @ohci description
- init_ohci1394_enable_physical_dma: missing @ohci description
- init_ohci1394_reset_and_init_dma: missing @ohci description
- init_ohci1394_controller: missing @num, @slot, @func descriptions
- setup_ohci1394_dma: missing @opt description

Tested with GCC 13.2.0 and W=1 flag. All documentation warnings
for these functions have been resolved.

Signed-off-by: Nirbhay Sharma <nirbhay.lkd@gmail.com>
Link: https://lore.kernel.org/r/20251024203219.101990-2-nirbhay.lkd@gmail.com
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
 2025-10-25 08:29:56 +09:00
Linus Torvalds
7083bb6060 Crypto library fix for v6.18-rc3 
Avoid some false-positive KMSAN warnings by restoring the dependency of
 the architecture-optimized Poly1305 code on !KMSAN.
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Merge tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

Pull crypto library fix from Eric Biggers:
 "Avoid some false-positive KMSAN warnings by restoring the dependency
  of the architecture-optimized Poly1305 code on !KMSAN"

* tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
  lib/crypto: poly1305: Restore dependency of arch code on !KMSAN
 2025-10-24 15:51:24 -07:00
Linus Torvalds
f2b2465726 six smb client fixes 
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Merge tag '6.18-rc2-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fixes from Steve French:

 - add missing tracepoints

 - smbdirect (RDMA) fix

 - fix potential issue with credits underflow

 - rename fix

 - improvement to calc_signature and additional cleanup patch

* tag '6.18-rc2-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: #include cifsglob.h before trace.h to allow structs in tracepoints
  cifs: Call the calc_signature functions directly
  smb: client: get rid of d_drop() in cifs_do_rename()
  cifs: Fix TCP_Server_Info::credits to be signed
  cifs: Add a couple of missing smb3_rw_credits tracepoints
  smb: client: allocate enough space for MR WRs and ib_drain_qp()
 2025-10-24 15:48:08 -07:00
Linus Torvalds
d2818517e3 block-6.18-20251023 
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Merge tag 'block-6.18-20251023' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block fixes from Jens Axboe:

 - Fix dma alignment for PI

 - Fix selinux bogosity with nbd, where sendmsg would get rejected

* tag 'block-6.18-20251023' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  block: require LBA dma_alignment when using PI
  nbd: override creds to kernel when calling sock_{send,recv}msg()
 2025-10-24 12:48:19 -07:00
Linus Torvalds
812e7eb2b0 io_uring-6.18-20251023 
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Merge tag 'io_uring-6.18-20251023' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull io_uring fixes from Jens Axboe:

 - Add MAINTAINERS entry for zcrx, mostly so that netdev gets
   automatically CC'ed by default on any changes there too.

 - Fix for the SQPOLL busy vs work time accounting.

   It was using getrusage(), which was both broken from a thread point
   of view (we only care about the SQPOLL thread itself), and vastly
   overkill as only the systime was used. On top of that, also be a bit
   smarter in when it's queried. It used excessive CPU before this
   change. Marked for stable as well.

 - Fix provided ring buffer auto commit for uring_cmd.

 - Fix a few style issues and sparse annotation for a lock.

* tag 'io_uring-6.18-20251023' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: fix buffer auto-commit for multishot uring_cmd
  io_uring: correct __must_hold annotation in io_install_fixed_file
  io_uring zcrx: add MAINTAINERS entry
  io_uring: Fix code indentation error
  io_uring/sqpoll: be smarter on when to update the stime usage
  io_uring/sqpoll: switch away from getrusage() for CPU accounting
  io_uring: fix incorrect unlikely() usage in io_waitid_prep()
 2025-10-24 12:44:31 -07:00
Linus Torvalds
66cd8e9cb8 slab fixes for 6.18-rc3 
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Merge tag 'slab-for-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fixes from Vlastimil Babka:

 - Two fixes for race conditions in obj_exts allocation (Hao Ge)

 - Fix for slab accounting imbalance due to deferred slab decativation
   (Vlastimil Babka)

* tag 'slab-for-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  slab: Fix obj_ext mistakenly considered NULL due to race condition
  slab: fix slab accounting imbalance due to defer_deactivate_slab()
  slab: Avoid race on slab->obj_exts in alloc_slab_obj_exts
 2025-10-24 12:40:51 -07:00
Linus Torvalds
2e590d67c2 Devicetree fixes for v6.18, part 2: 
- Fix handling of GICv5 ITS MSI properties on platforms with
   'msi-parent' as well as a of_node refcounting fix. This is also
   preparation for further refactoring in 6.19 to use common DT parsing
   of MSI properties.
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Merge tag 'devicetree-fixes-for-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Fix handling of GICv5 ITS MSI properties on platforms with
   'msi-parent' as well as a of_node refcounting fix.

   This is also preparation for further refactoring in 6.19 to use
   common DT parsing of MSI properties.

* tag 'devicetree-fixes-for-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of/irq: Export of_msi_xlate() for module usage
  of/irq: Fix OF node refcount in of_msi_get_domain()
  of/irq: Add msi-parent check to of_msi_xlate()
 2025-10-24 11:17:38 -07:00
Linus Torvalds
9b9b6e71ee soc: fixes for 6.18, part 2 
The main change this time is an update to the MAINTAINERS file,
 listing Krzysztof Kozlowski, Alexandre Belloni, and Linus Walleij as
 additional maintainers for the SoC tree, in order to go back to a group
 maintainership.  Drew Fustini joins as an additional reviewer for the
 SoC tree.
 
 Thanks to all of you for volunteering to help out.
 
 On the actual bugfixes, we have a few correctness changes for firmware
 drivers (qtee, arm-ffa, scmi) and two devicetree fixes for Raspberry Pi.
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Merge tag 'soc-fixes-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC fixes from Arnd Bergmann:
 "The main change this time is an update to the MAINTAINERS file,
  listing Krzysztof Kozlowski, Alexandre Belloni, and Linus Walleij as
  additional maintainers for the SoC tree, in order to go back to a
  group maintainership. Drew Fustini joins as an additional reviewer for
  the SoC tree.

  Thanks to all of you for volunteering to help out.

  On the actual bugfixes, we have a few correctness changes for firmware
  drivers (qtee, arm-ffa, scmi) and two devicetree fixes for Raspberry
  Pi"

* tag 'soc-fixes-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  soc: officially expand maintainership team
  firmware: arm_scmi: Fix premature SCMI_XFER_FLAG_IS_RAW clearing in raw mode
  firmware: arm_scmi: Skip RAW initialization on failure
  include: trace: Fix inflight count helper on failed initialization
  firmware: arm_scmi: Account for failed debug initialization
  ARM: dts: broadcom: rpi: Switch to V3D firmware clock
  arm64: dts: broadcom: bcm2712: Define VGIC interrupt
  firmware: arm_ffa: Add support for IMPDEF value in the memory access descriptor
  tee: QCOMTEE should depend on ARCH_QCOM
  tee: qcom: return -EFAULT instead of -EINVAL if copy_from_user() fails
  tee: qcom: prevent potential off by one read
 2025-10-24 11:15:17 -07:00
Linus Torvalds
7bd29bf1fd hwmon fixes for v6.18-rc3 
* cgbc-hwmon: Add missing NULL check after devm_kzalloc
 
 * gpd-fan: Fix error handling
 
 * pmbus/isl68137: Fix child node reference leak
 
 * pmbus/max34440: Update adpm12160 coefficients to match latest FW
 
 * sht3x: Fix error handling
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Merge tag 'hwmon-for-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - cgbc-hwmon: Add missing NULL check after devm_kzalloc

 - gpd-fan: Fix error handling

 - pmbus/isl68137: Fix child node reference leak

 - pmbus/max34440: Update adpm12160 coefficients to match latest FW

 - sht3x: Fix error handling

* tag 'hwmon-for-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (sht3x) Fix error handling
  hwmon: (cgbc-hwmon) Add missing NULL check after devm_kzalloc()
  hwmon: (pmbus/isl68137) Fix child node reference leak on early return
  hwmon: (gpd-fan) Fix error handling in gpd_fan_probe()
  hwmon: (gpd-fan) Fix return value when platform_get_resource() fails
  hwmon: (pmbus/max34440) Update adpm12160 coeff due to latest FW
 2025-10-24 11:11:35 -07:00
Linus Torvalds
58834e2d3e spi: Fixes for v6.18 
A moderately large collection of device specific changes here, mostly
 fixes but also including a few new quirks and device IDs.  This is all
 fairly routine even for the affected devices.
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Merge tag 'spi-fix-v6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A moderately large collection of device specific changes here, mostly
  fixes but also including a few new quirks and device IDs. This is all
  fairly routine even for the affected devices"

* tag 'spi-fix-v6.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: dt-bindings: spi-rockchip: Add RK3506 compatible
  spi: intel-pci: Add support for Intel Wildcat Lake SPI serial flash
  spi: intel-pci: Add support for Arrow Lake-H SPI serial flash
  spi: intel: Add support for 128M component density
  spi: airoha: fix reading/writing of flashes with more than one plane per lun
  spi: airoha: switch back to non-dma mode in the case of error
  spi: airoha: add support of dual/quad wires spi modes to exec_op() handler
  spi: airoha: return an error for continuous mode dirmap creation cases
  spi: amlogic: fix spifc build error
  spi: cadence-quadspi: Fix pm_runtime unbalance on dma EPROBE_DEFER
  spi: spi-nxp-fspi: limit the clock rate for different sample clock source selection
  spi: spi-nxp-fspi: add extra delay after dll locked
  spi: spi-nxp-fspi: re-config the clock rate when operation require new clock rate
  spi: dw-mmio: add error handling for reset_control_deassert()
  spi: rockchip-sfc: Fix DMA-API usage
  spi: dt-bindings: cadence: add soc-specific compatible strings for zynqmp and versal-net
 2025-10-24 11:01:40 -07:00
Linus Torvalds
c1a1c0d32d gpio fixes for v6.18-rc3 
- fix regressions in regmap cache initialization in gpio-104-idio-16 and
   gpio-pci-idio-16
 - configure first 16 GPIO lines of the IDIO-16 as fixed outputs
 - fix duplicated IRQ mapping that can lead to an RCU stall in gpio-ljca
 - fix printf formatters passed to dev_err() and make failure to set
   debounce period non fatal
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Merge tag 'gpio-fixes-for-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix regressions in regmap cache initialization in gpio-104-idio-16
   and gpio-pci-idio-16

 - configure first 16 GPIO lines of the IDIO-16 as fixed outputs

 - fix duplicated IRQ mapping that can lead to an RCU stall in gpio-ljca

 - fix printf formatters passed to dev_err() and make failure to set
   debounce period non fatal

* tag 'gpio-fixes-for-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: ljca: Fix duplicated IRQ mapping
  gpiolib: acpi: Use %pe when passing an error pointer to dev_err()
  gpiolib: acpi: Make set debounce errors non fatal
  gpio: idio-16: Define fixed direction of the GPIO lines
  gpio: regmap: add the .fixed_direction_output configuration parameter
  gpio: pci-idio-16: Define maximum valid register address offset
  gpio: 104-idio-16: Define maximum valid register address offset
 2025-10-24 10:45:29 -07:00
Arnd Bergmann
b2a578f312 soc: officially expand maintainership team 
Since Olof moved on from the soc tree maintenance, Arnd has mainly taken
care of the day-to-day activities around the SoC tree by himself, which
is generally not a good setup.

Krzysztof, Linus and Alexandre have volunteered to become co-maintainers
of the SoC tree, with the plan of taking turns to do merges and reviews
to spread the workload. In addition, Drew joins as another reviewer.

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Drew Fustini <fustini@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2025-10-24 18:58:39 +02:00
Andy Shevchenko
84dfce65a7 x86/bugs: Remove dead code which might prevent from building 
Clang, in particular, is not happy about dead code:

arch/x86/kernel/cpu/bugs.c:1830:20: error: unused function 'match_option' [-Werror,-Wunused-function]
 1830 | static inline bool match_option(const char *arg, int arglen, const char *opt)
      |                    ^~~~~~~~~~~~
1 error generated.

Remove a leftover from the previous cleanup.

Fixes: 02ac6cc8c5 ("x86/bugs: Simplify SSB cmdline parsing")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://patch.msgid.link/20251024125959.1526277-1-andriy.shevchenko%40linux.intel.com
 2025-10-24 09:42:00 -07:00
Lorenzo Pieralisi
7209ff3100 of/irq: Export of_msi_xlate() for module usage 
of_msi_xlate() is required by drivers that can be configured
as modular, export the symbol.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Cc: Rob Herring <robh@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251021124103.198419-4-lpieralisi@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
 2025-10-24 07:44:09 -05:00
Greg Kroah-Hartman
a1b866f201 USB serial device ids for 6.18-rc3 
Here are some new modem device ids.
 
 All have been in linux-next with no reported issues.
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Merge tag 'usb-serial-6.18-rc3' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB serial device ids for 6.18-rc3

Here are some new modem device ids.

All have been in linux-next with no reported issues.

* tag 'usb-serial-6.18-rc3' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
  USB: serial: option: add Telit FN920C04 ECM compositions
  USB: serial: option: add Quectel RG255C
  USB: serial: option: add UNISOC UIS7720
 2025-10-24 13:52:58 +02:00
Simona Vetter
18b1ce0b29 UAPI Changes: 
- Make madvise autoreset an explicit behavior requested by userspace
    (Thomas Hellström)
 
 Driver Changes:
  - Drop XE_VMA flag conversion and ensure GPUVA flags are passed around
    (homas Hellström)
  - Fix missing wq allocation error checking (Matthew Brost)
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Merge tag 'drm-xe-fixes-2025-10-23' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes

UAPI Changes:
 - Make madvise autoreset an explicit behavior requested by userspace
   (Thomas Hellström)

Driver Changes:
 - Drop XE_VMA flag conversion and ensure GPUVA flags are passed around
   (homas Hellström)
 - Fix missing wq allocation error checking (Matthew Brost)

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/4p2glnvgifc6osjlvzv23xhsyqhw4diqlfxz54lmg7robv44bi@nwd37zpqfa2l
 2025-10-24 13:39:21 +02:00
Simona Vetter
adb0971a1a - Fix panic structure allocation memory leak (Jani) 
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Merge tag 'drm-intel-fixes-2025-10-23' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes

- Fix panic structure allocation memory leak (Jani)

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/aPojgsvNYOU0tN4U@intel.com
 2025-10-24 13:36:48 +02:00
Simona Vetter
0cdf7f6fa6 Short summary of fixes pull: 
panic:
 - Fix several issues in size calculations
 
 panthor:
 - Fix kernel panic on partial unmap of GPU VA region
 
 rockchip:
 - hdmi: Fix HDP setup
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Merge tag 'drm-misc-fixes-2025-10-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

Short summary of fixes pull:

panic:
- Fix several issues in size calculations

panthor:
- Fix kernel panic on partial unmap of GPU VA region

rockchip:
- hdmi: Fix HDP setup

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20251023083449.GA13190@linux-2.fritz.box
 2025-10-24 13:35:26 +02:00
Simona Vetter
6ced10611e amd-drm-fixes-6.18-2025-10-22: 
amdgpu:
 - DP MST fix
 - Fix DC max link count
 - DC interrupt atomic context fix
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Merge tag 'amd-drm-fixes-6.18-2025-10-22' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.18-2025-10-22:

amdgpu:
- DP MST fix
- Fix DC max link count
- DC interrupt atomic context fix

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>

From: Alex Deucher <alexander.deucher@amd.com>
Link: https://lore.kernel.org/r/20251022222005.1787211-1-alexander.deucher@amd.com
 2025-10-24 13:28:45 +02:00
Hao Ge
7f434e1d9a slab: Fix obj_ext mistakenly considered NULL due to race condition 
If two competing threads enter alloc_slab_obj_exts(), and the one that
allocates the vector wins the cmpxchg(), the other thread that failed
allocation mistakenly assumes that slab->obj_exts is still empty due to
its own allocation failure. This will then trigger warnings with
CONFIG_MEM_ALLOC_PROFILING_DEBUG checks in the subsequent free path.

Therefore, let's check the result of cmpxchg() to see if marking the
allocation as failed was successful. If it wasn't, check whether the
winning side has succeeded its allocation (it might have been also
marking it as failed) and if yes, return success.

Suggested-by: Harry Yoo <harry.yoo@oracle.com>
Fixes: f7381b9116 ("slab: mark slab->obj_exts allocation failures unconditionally")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hao Ge <gehao@kylinos.cn>
Link: https://patch.msgid.link/20251023143313.1327968-1-hao.ge@linux.dev
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
 2025-10-24 12:40:13 +02:00