Commit graph

1,412,036 commits

Author SHA1 Message Date
Massimiliano Pellizzer
08020dbe31 apparmor: fix signedness bug in unpack_tags()
Smatch static checker warning:
    security/apparmor/policy_unpack.c:966 unpack_pdb()
    warn: unsigned 'unpack_tags(e, &pdb->tags, info)' is never less than zero.

unpack_tags() is declared with return type size_t (unsigned) but returns
negative errno values on failure. The caller in unpack_pdb() tests the
return with `< 0`, which is always false for an unsigned type, making
error handling dead code. Malformed tag data would be silently accepted
instead of causing a load failure.

Change return type of unpack_tags() from size_t to int to match the
functions's actual semantic.

Fixes: 3d28e2397a ("apparmor: add support loading per permission tagging")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Massimiliano Pellizzer <mpellizzer.dev@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-18 11:50:20 -08:00
John Johansen
1b51bd7615 apparmor: fix cast in format string DEBUG statement
if debugging is enabled the DEBUG statement will fail do to a bad
fat fingered cast.

Fixes: 102ada7ca3 ("apparmor: fix fmt string type error in process_strs_entry")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-03 04:47:32 -08:00
John Johansen
9058798652 apparmor: fix aa_label to return state from compount and component match
aa-label_match is not correctly returning the state in all cases.
The only reason this didn't cause a error is that all callers currently
ignore the return value.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202602020631.wXgZosyU-lkp@intel.com/
Fixes: a4c9efa4db ("apparmor: make label_match return a consistent value")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-02 04:16:26 -08:00
John Johansen
102ada7ca3 apparmor: fix fmt string type error in process_strs_entry
pointer subtraction has a type of int when using clang on hexagon,
microblaze (and possibly other archs). We know the subtraction is
postive so cast the expression to unsigned long to match what is in
the fmt string.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202602021429.CcmWkR9K-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202602021427.PvvDjgyL-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202602021510.JPzX5zKb-lkp@intel.com/
Fixes: c140dcd124 ("apparmor: make str table more generic and be able to have multiple entries")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-02 04:16:15 -08:00
John Johansen
3734b9463b apparmor: fix kernel-doc comments for inview
subns was renamed inview to better reflect the function of the flag.
Unfortunately the kernel-doc was not properly updated in 2 places.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202602020737.vGCZFds1-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202602021427.PvvDjgyL-lkp@intel.com/
Fixes: 796c146fa6 ("apparmor: split xxx_in_ns into its two separate semantic use cases")
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-02 03:53:43 -08:00
Georgia Garcia
df9ac55abd apparmor: fix invalid deref of rawdata when export_binary is unset
If the export_binary parameter is disabled on runtime, profiles that
were loaded before that will still have their rawdata stored in
apparmorfs, with a symbolic link to the rawdata on the policy
directory. When one of those profiles are replaced, the rawdata is set
to NULL, but when trying to resolve the symbolic links to rawdata for
that profile, it will try to dereference profile->rawdata->name when
profile->rawdata is now NULL causing an oops. Fix it by checking if
rawdata is set.

[  168.653080] BUG: kernel NULL pointer dereference, address: 0000000000000088
[  168.657420] #PF: supervisor read access in kernel mode
[  168.660619] #PF: error_code(0x0000) - not-present page
[  168.663613] PGD 0 P4D 0
[  168.665450] Oops: Oops: 0000 [#1] SMP NOPTI
[  168.667836] CPU: 1 UID: 0 PID: 1729 Comm: ls Not tainted 6.19.0-rc7+ #3 PREEMPT(voluntary)
[  168.672308] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  168.679327] RIP: 0010:rawdata_get_link_base.isra.0+0x23/0x330
[  168.682768] Code: 90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 55 d0 48 85 ff 0f 84 e3 01 00 00 <48> 83 3c 25 88 00 00 00 00 0f 84 d4 01 00 00 49 89 f6 49 89 cc e8
[  168.689818] RSP: 0018:ffffcdcb8200fb80 EFLAGS: 00010282
[  168.690871] RAX: ffffffffaee74ec0 RBX: 0000000000000000 RCX: ffffffffb0120158
[  168.692251] RDX: ffffcdcb8200fbe0 RSI: ffff88c187c9fa80 RDI: ffff88c186c98a80
[  168.693593] RBP: ffffcdcb8200fbc0 R08: 0000000000000000 R09: 0000000000000000
[  168.694941] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88c186c98a80
[  168.696289] R13: 00007fff005aaa20 R14: 0000000000000080 R15: ffff88c188f4fce0
[  168.697637] FS:  0000790e81c58280(0000) GS:ffff88c20a957000(0000) knlGS:0000000000000000
[  168.699227] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  168.700349] CR2: 0000000000000088 CR3: 000000012fd3e000 CR4: 0000000000350ef0
[  168.701696] Call Trace:
[  168.702325]  <TASK>
[  168.702995]  rawdata_get_link_data+0x1c/0x30
[  168.704145]  vfs_readlink+0xd4/0x160
[  168.705152]  do_readlinkat+0x114/0x180
[  168.706214]  __x64_sys_readlink+0x1e/0x30
[  168.708653]  x64_sys_call+0x1d77/0x26b0
[  168.709525]  do_syscall_64+0x81/0x500
[  168.710348]  ? do_statx+0x72/0xb0
[  168.711109]  ? putname+0x3e/0x80
[  168.711845]  ? __x64_sys_statx+0xb7/0x100
[  168.712711]  ? x64_sys_call+0x10fc/0x26b0
[  168.713577]  ? do_syscall_64+0xbf/0x500
[  168.714412]  ? do_user_addr_fault+0x1d2/0x8d0
[  168.715404]  ? irqentry_exit+0xb2/0x740
[  168.716359]  ? exc_page_fault+0x90/0x1b0
[  168.717307]  entry_SYSCALL_64_after_hwframe+0x76/0x7e

Fixes: 1180b4c757 ("apparmor: fix dangling symlinks to policy rawdata after replacement")
Signed-off-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-02 03:31:35 -08:00
Ryota Sakamoto
2f53da43b2 apparmor: add .kunitconfig
Add .kunitconfig file to the AppArmor directory to enable easy execution of
KUnit tests.

AppArmor tests (CONFIG_SECURITY_APPARMOR_KUNIT_TEST) depend on
CONFIG_SECURITY_APPARMOR which also depends on CONFIG_SECURITY and
CONFIG_NET. Without explicitly enabling these configs in the .kunitconfig,
developers will need to specify config manually.

With the .kunitconfig, developers can run the tests:
  $ ./tools/testing/kunit/kunit.py run --kunitconfig security/apparmor

Signed-off-by: Ryota Sakamoto <sakamo.ryota@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-02-01 12:01:19 -08:00
John Johansen
859b725579 apparmor: cleanup remove unused percpu critical sections in buffer management
There are two unused percpu critical sections in the buffer management
code. These are remanents from when a more complex hold algorithm was
used. Remove them, as they serve no purpose.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:55 -08:00
John Johansen
0b6a6b72b3 apparmor: document the buffer hold, add an overflow guard
The buffer hold is a measure of contention, but it is tracked per cpu
where the lock is a globabl resource. On some systems (eg. real time)
there is no guarantee that the code will be on the same cpu pre, and
post spinlock acquisition, nor that the buffer will be put back to
the same percpu cache when we are done with it.

Because of this the hold value can move asynchronous to the buffers on
the cache, meaning it is possible to underflow, and potentially in really
pathelogical cases overflow.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:55 -08:00
Zhengmian Hu
640cf2f095 apparmor: avoid per-cpu hold underflow in aa_get_buffer
When aa_get_buffer() pulls from the per-cpu list it unconditionally
decrements cache->hold. If hold reaches 0 while count is still non-zero,
the unsigned decrement wraps to UINT_MAX. This keeps hold non-zero for a
very long time, so aa_put_buffer() never returns buffers to the global
list, which can starve other CPUs and force repeated kmalloc(aa_g_path_max)
allocations.

Guard the decrement so hold never underflows.
Fixes: ea9bae12d0 ("apparmor: cache buffers on percpu list if there is lock contention")

Signed-off-by: Zhengmian Hu <huzhengmian@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:55 -08:00
John Johansen
796c146fa6 apparmor: split xxx_in_ns into its two separate semantic use cases
This patch doesn't change current functionality, it switches the two
uses of the in_ns fns and macros into the two semantically different
cases they are used for.

xxx_in_scope for checking mediation interaction between profiles
xxx_in_view to determine which profiles are visible.The scope will
always be a subset of the view as profiles that can not see each
other can not interact.

The split can not be completely done for label_match because it has to
distinct uses matching permission against label in scope, and checking
if a transition to a profile is allowed. The transition to a profile
can include profiles that are in view but not in scope, so retain this
distinction as a parameter.

While at the moment the two uses are very similar, in the future there
will be additional differences. So make sure the semantics differences
are present in the code.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:55 -08:00
John Johansen
a4c9efa4db apparmor: make label_match return a consistent value
compound match is inconsistent in returning a state or an integer error
this is problemati if the error is ever used as a state in the state
machine

Fixes: f1bd904175 ("apparmor: add the base fns() for domain labels")
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:55 -08:00
John Johansen
b2e27be294 apparmor: remove apply_modes_to_perms from label_match
The modes shouldn't be applied at the point of label match, it just
results in them being applied multiple times. Instead they should be
applied after which is already being done by all callers so it can
just be dropped from label_match.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
9f79b1cee9 apparmor: fix fast path cache check for unix sockets
The fast path cache check is incorrect forcing more slow path
revalidations than necessary, because the unix logic check is inverted.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
6ca56813f4 apparmor: fix rlimit for posix cpu timers
Posix cpu timers requires an additional step beyond setting the rlimit.
Refactor the code so its clear when what code is setting the
limit and conditionally update the posix cpu timers when appropriate.

Fixes: baa73d9e47 ("posix-timers: Make them configurable")
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
acf2a94ac4 apparmor: refactor/cleanup cred helper fns.
aa_cred_raw_label() and cred_label() now do the same things so
consolidate to cred_label()

Document the crit section use and constraints better and refactor
__begin_current_label_crit_section() into a base fn
__begin_cred_crit_section() and a wrapper that calls the base with
current cred.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
1301b95619 apparmor: fix label and profile debug macros
The label and profile debug macros were not correctly pasting their
var args.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
4a134723f9 apparmor: move check for aa_null file to cover all cases
files with a dentry pointing aa_null.dentry where already rejected as
part of file_inheritance. Unfortunately the check in
common_file_perm() is insufficient to cover all cases causing
unnecessary audit messages without the original files context.

Eg.
[ 442.886474] audit: type=1400 audit(1704822661.616:329): apparmor="DENIED" operation="file_inherit" class="file" namespace="root//lxd-juju-98527a-0_<var-snap-lxd-common-lxd>" profile="snap.lxd.activate" name="/apparmor/.null" pid=9525 comm="snap-exec"

Further examples of this are in the logs of
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2120439
https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1952084
https://bugs.launchpad.net/snapd/+bug/2049099

These messages have no value and should not be sent to the logs.
AppArmor was already filtering the out in some cases but the original
patch did not catch all cases. Fix this by push the existing check
down into two functions that should cover all cases.

Link: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2122743
Fixes: 192ca6b55a ("apparmor: revalidate files during exec")
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
e16eee7895 apparmor: guard against free routines being called with a NULL
aa_free_data() and free_attachment() don't guard against having
a NULL parameter passed to them. Fix this.

Reviewed-by: Ryan Lee <ryan.lee@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
Ryan Lee
74b7105e53 apparmor: return -ENOMEM in unpack_perms_table upon alloc failure
In policy_unpack.c:unpack_perms_table, the perms struct is allocated via
kcalloc, with the position being reset if the allocation fails. However,
the error path results in -EPROTO being retured instead of -ENOMEM. Fix
this to return the correct error code.

Reported-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
Fixes: fd1b2b95a2 ("apparmor: add the ability for policy to specify a permission table")
Reviewed-by: Tyler Hicks <code@tyhicks.com>
Signed-off-by: Ryan Lee <ryan.lee@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
Ryan Lee
9b829c0aa9 apparmor: account for in_atomic removal in common_file_perm
If we are not in an atomic context in common_file_perm, then we don't have
to use the atomic versions, resulting in improved performance outside of
atomic contexts.

Signed-off-by: Ryan Lee <ryan.lee@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:54 -08:00
John Johansen
c3f27ccdb2 apparmor: drop in_atomic flag in common_mmap, and common_file_perm
with the previous changes to mmap the in_atomic flag is now always
false, so drop it.

Suggested-by: Tyler Hicks <code@tyhicks.com>
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:53 -08:00
Ryan Lee
48d5268e91 apparmor: fix boolean argument in apparmor_mmap_file
The previous value of GFP_ATOMIC is an int and not a bool, potentially
resulting in UB when being assigned to a bool. In addition, the mmap hook
is called outside of locks (i.e. in a non-atomic context), so we can pass
a fixed constant value of false instead to common_mmap.

Signed-off-by: Ryan Lee <ryan.lee@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:53 -08:00
Maxime Bélair
8d34e16f7f apparmor: userns: Add support for execpath in userns
This new field allows reliable identification of the binary that
triggered a denial since the existing field (comm) only gives the name of
the binary, not its path. Thus comm doesn't work for binaries outside of
$PATH or works unreliably when two binaries have the same name.
Additionally comm can be modified by a program, for example, comm="(tor)"
or comm=4143504920506F6C6C6572 (= ACPI Poller).

Signed-off-by: Maxime Bélair <maxime.belair@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:53 -08:00
John Johansen
3d28e2397a apparmor: add support loading per permission tagging
Add support for the per permission tag index for a given permission
set. This will be used by both meta-data tagging, to allow annotating
accept states with context and debug information. As well as by rule
tainting and triggers to specify the taint or trigger to be applied.

Since these are low frequency ancillary data items they are stored
in a tighter packed format to that allows for sharing and reuse of the
strings between permissions and accept states. Reducing the amount of
kernel memory use at the cost of having to go through a couple if
index based indirections.

The tags are just strings that has no meaning with out context. When
used as meta-data for auditing and debugging its entirely information
for userspace, but triggers, and tainting can be used to affect the
domain. However they all exist in the same packed data set and can
be shared between different uses.

Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-29 01:27:47 -08:00
John Johansen
c140dcd124 apparmor: make str table more generic and be able to have multiple entries
The strtable is currently limited to a single entry string on unpack
even though domain has the concept of multiple entries within it. Make
this a reality as it will be used for tags and more advanced domain
transitions.

Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-22 04:56:39 -08:00
Helge Deller
6fc367bfd4 apparmor: Fix & Optimize table creation from possibly unaligned memory
Source blob may come from userspace and might be unaligned.
Try to optize the copying process by avoiding unaligned memory accesses.

- Added Fixes tag
- Added "Fix &" to description as this doesn't just optimize but fixes
        a potential unaligned memory access
Fixes: e6e8bf4188 ("apparmor: fix restricted endian type warnings for dfa unpack")
Signed-off-by: Helge Deller <deller@gmx.de>
[jj: remove duplicate word "convert" in comment trigger checkpatch warning]
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-22 04:52:25 -08:00
Helge Deller
64802f7312 AppArmor: Allow apparmor to handle unaligned dfa tables
The dfa tables can originate from kernel or userspace and 8-byte alignment
isn't always guaranteed and as such may trigger unaligned memory accesses
on various architectures. Resulting in the following

[   73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720
[   74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom
sd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common
[   74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE
[   74.536543] Call Trace:
[   74.568561] [<0000000000434c24>] dump_stack+0x8/0x18
[   74.633757] [<0000000000476438>] __warn+0xd8/0x100
[   74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74
[   74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720
[   74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0
[   74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300
[   74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0
[   75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160
[   75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280
[   75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100
[   75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420
[   75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0
[   75.406932] [<0000000000767174>] sys_write+0x14/0x40
[   75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44
[   75.548802] ---[ end trace 0000000000000000 ]---
[   75.609503] dfa blob stream 0xfff0000008926b96 not aligned.
[   75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720

Work around it by using the get_unaligned_xx() helpers.

Fixes: e6e8bf4188 ("apparmor: fix restricted endian type warnings for dfa unpack")
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Closes: https://github.com/sparclinux/issues/issues/30
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-22 04:52:25 -08:00
Thorsten Blum
1c90ed1f14 apparmor: Replace deprecated strcpy with memcpy in gen_symlink_name
strcpy() is deprecated; use memcpy() instead. Unlike strcpy(), memcpy()
does not copy the NUL terminator from the source string, which would be
overwritten anyway on every iteration when using strcpy(). snprintf()
then ensures that 'char *s' is NUL-terminated.

Replace the hard-coded path length to remove the magic number 6, and add
a comment explaining the extra 11 bytes.

Closes: https://github.com/KSPP/linux/issues/88
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-22 04:52:25 -08:00
John Johansen
00b6765753 apparmor: fix NULL sock in aa_sock_file_perm
Deal with the potential that sock and sock-sk can be NULL during
socket setup or teardown. This could lead to an oops. The fix for NULL
pointer dereference in __unix_needs_revalidation shows this is at
least possible for af_unix sockets. While the fix for af_unix sockets
applies for newer mediation this is still the fall back path for older
af_unix mediation and other sockets, so ensure it is covered.

Fixes: 56974a6fcf ("apparmor: add base infastructure for socket mediation")
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-22 04:51:55 -08:00
System Administrator
e2938ad00b apparmor: fix NULL pointer dereference in __unix_needs_revalidation
When receiving file descriptors via SCM_RIGHTS, both the socket pointer
and the socket's sk pointer can be NULL during socket setup or teardown,
causing NULL pointer dereferences in __unix_needs_revalidation().

This is a regression in AppArmor 5.0.0 (kernel 6.17+) where the new
__unix_needs_revalidation() function was added without proper NULL checks.

The crash manifests as:
  BUG: kernel NULL pointer dereference, address: 0x0000000000000018
  RIP: aa_file_perm+0xb7/0x3b0 (or +0xbe/0x3b0, +0xc0/0x3e0)
  Call Trace:
   apparmor_file_receive+0x42/0x80
   security_file_receive+0x2e/0x50
   receive_fd+0x1d/0xf0
   scm_detach_fds+0xad/0x1c0

The function dereferences sock->sk->sk_family without checking if either
sock or sock->sk is NULL first.

Add NULL checks for both sock and sock->sk before accessing sk_family.

Fixes: 88fec3526e ("apparmor: make sure unix socket labeling is correctly updated.")
Reported-by: Jamin Mc <jaminmc@gmail.com>
Closes: https://bugzilla.proxmox.com/show_bug.cgi?id=7083
Closes: https://gitlab.com/apparmor/apparmor/-/issues/568
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: System Administrator <root@localhost>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-18 07:06:30 -08:00
Thorsten Blum
93d4dbdc8d apparmor: Replace deprecated strcpy in d_namespace_path
strcpy() is deprecated; replace it with a direct '/' assignment. The
buffer is already NUL-terminated, so there is no need to copy an
additional NUL terminator as strcpy() did.

Update the comment and add the local variable 'is_root' for clarity.

Closes: https://github.com/KSPP/linux/issues/88
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-18 06:53:18 -08:00
Thorsten Blum
b31d3f7385 apparmor: Replace sprintf/strcpy with scnprintf/strscpy in aa_policy_init
strcpy() is deprecated and sprintf() does not perform bounds checking
either. Although an overflow is unlikely, it's better to proactively
avoid it by using the safer strscpy() and scnprintf(), respectively.

Additionally, unify memory allocation for 'hname' to simplify and
improve aa_policy_init().

Closes: https://github.com/KSPP/linux/issues/88
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-18 06:52:58 -08:00
Thorsten Blum
7db8c3c738 apparmor: replace sprintf with snprintf in aa_new_learning_profile
Replace unbounded sprintf() calls with snprintf() to prevent potential
buffer overflows in aa_new_learning_profile(). While the current code
works correctly, snprintf() is safer and follows secure coding best
practices.  No functional changes.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2026-01-16 10:46:54 -08:00
Linus Torvalds
8f0b4cce44 Linux 6.19-rc1 v6.19-rc1 2025-12-14 16:05:07 +12:00
Linus Torvalds
6a1636e066 SCSI misc on 20251214
The only core fix is in doc; all the others are in drivers, with the
 biggest impacts in libsas being the rollback on error handling and in
 ufs coming from a couple of error handling fixes, one causing a crash
 if it's activated before scanning and the other fixing W-LUN
 resumption.
 
 Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "The only core fix is in doc; all the others are in drivers, with the
  biggest impacts in libsas being the rollback on error handling and in
  ufs coming from a couple of error handling fixes, one causing a crash
  if it's activated before scanning and the other fixing W-LUN
  resumption"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: qcom: Fix confusing cleanup.h syntax
  scsi: libsas: Add rollback handling when an error occurs
  scsi: device_handler: Return error pointer in scsi_dh_attached_handler_name()
  scsi: ufs: core: Fix a deadlock in the frequency scaling code
  scsi: ufs: core: Fix an error handler crash
  scsi: Revert "scsi: libsas: Fix exp-attached device scan after probe failure scanned in again after probe failed"
  scsi: ufs: core: Fix RPMB link error by reversing Kconfig dependencies
  scsi: qla4xxx: Use time conversion macros
  scsi: qla2xxx: Enable/disable IRQD_NO_BALANCING during reset
  scsi: ipr: Enable/disable IRQD_NO_BALANCING during reset
  scsi: imm: Fix use-after-free bug caused by unfinished delayed work
  scsi: target: sbp: Remove KMSG_COMPONENT macro
  scsi: core: Correct documentation for scsi_device_quiesce()
  scsi: mpi3mr: Prevent duplicate SAS/SATA device entries in channel 1
  scsi: target: Reset t_task_cdb pointer in error case
  scsi: ufs: core: Fix EH failure after W-LUN resume error
2025-12-14 15:35:35 +12:00
Linus Torvalds
0dfb36b2dc We have a patch that adds an initial set of tracepoints to the MDS
client from Max, a fix that hardens osdmap parsing code from myself
 (marked for stable) and a few assorted fixups.
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Merge tag 'ceph-for-6.19-rc1' of https://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "We have a patch that adds an initial set of tracepoints to the MDS
  client from Max, a fix that hardens osdmap parsing code from myself
  (marked for stable) and a few assorted fixups"

* tag 'ceph-for-6.19-rc1' of https://github.com/ceph/ceph-client:
  rbd: stop selecting CRC32, CRYPTO, and CRYPTO_AES
  ceph: stop selecting CRC32, CRYPTO, and CRYPTO_AES
  libceph: make decode_pool() more resilient against corrupted osdmaps
  libceph: Amend checking to fix `make W=1` build breakage
  ceph: Amend checking to fix `make W=1` build breakage
  ceph: add trace points to the MDS client
  libceph: fix log output race condition in OSD client
2025-12-14 15:24:10 +12:00
Linus Torvalds
4cfc21494a Trivial optimization.
Davidlohr Bueso (1):
   tomoyo: Use local kmap in tomoyo_dump_page()
 
  security/tomoyo/domain.c |    9 ++-------
  1 file changed, 2 insertions(+), 7 deletions(-)
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Merge tag 'tomoyo-pr-20251212' of git://git.code.sf.net/p/tomoyo/tomoyo

Pull tomoyo update from Tetsuo Handa:
 "Trivial optimization"

* tag 'tomoyo-pr-20251212' of git://git.code.sf.net/p/tomoyo/tomoyo:
  tomoyo: Use local kmap in tomoyo_dump_page()
2025-12-14 15:21:02 +12:00
Linus Torvalds
4a298a43f5 Fix CPU hotplug callbacks to disable interrupts on UP kernels.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'smp-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull CPU hotplug fix from Ingo Molnar:

 - Fix CPU hotplug callbacks to disable interrupts on UP kernels

* tag 'smp-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu: Make atomic hotplug callbacks run with interrupts disabled on UP
2025-12-14 06:12:46 +12:00
Linus Torvalds
cba09e3ed0 Misc fixes:
- Fix NULL pointer dereference crash in the Intel PMU driver
  - Fix missing read event generation on task exit
  - Fix AMD uncore driver init error handling
  - Fix whitespace noise
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf event fixes from Ingo Molnar:

 - Fix NULL pointer dereference crash in the Intel PMU driver

 - Fix missing read event generation on task exit

 - Fix AMD uncore driver init error handling

 - Fix whitespace noise

* tag 'perf-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Fix NULL event dereference crash in handle_pmi_common()
  perf/core: Fix missing read event generation on task exit
  perf/x86/amd/uncore: Fix the return value of amd_uncore_df_event_init() on error
  perf/uprobes: Remove <space><Tab> whitespace noise
2025-12-14 06:10:35 +12:00
Linus Torvalds
db0130185e Misc fixes:
- Fix error code in the irqchip/mchp-eic driver
  - Fix setup_percpu_irq() affinity assumptions
  - Remove the unused irq_domain_add_tree() function
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'irq-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fixes from Ingo Molnar:

 - Fix error code in the irqchip/mchp-eic driver

 - Fix setup_percpu_irq() affinity assumptions

 - Remove the unused irq_domain_add_tree() function

* tag 'irq-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc()
  irqdomain: Delete irq_domain_add_tree()
  genirq: Allow NULL affinity for setup_percpu_irq()
2025-12-14 06:07:09 +12:00
Linus Torvalds
edbe407235 Miscellaneous fixes:
- Improve bug reporting
  - Suppress W=1 format warning
  - Improve rseq scalability on Clang builds
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull misc core fixes from Ingo Molnar:

 - Improve bug reporting

 - Suppress W=1 format warning

 - Improve rseq scalability on Clang builds

* tag 'core-urgent-2025-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rseq: Always inline rseq_debug_syscall_return()
  bug: Hush suggest-attribute=format for __warn_printf()
  bug: Let report_bug_entry() provide the correct bugaddr
2025-12-14 06:04:16 +12:00
Linus Torvalds
9d9c1cfec0 There are no significant series in this small merge. Please see the
individual changelogs for details.
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Merge tag 'mm-nonmm-stable-2025-12-11-11-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc updates from Andrew Morton:
 "There are no significant series in this small merge. Please see the
  individual changelogs for details"

[ Editor's note: it's mainly ocfs2 and a couple of random fixes ]

* tag 'mm-nonmm-stable-2025-12-11-11-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm: memfd_luo: add CONFIG_SHMEM dependency
  mm: shmem: avoid build warning for CONFIG_SHMEM=n
  ocfs2: fix memory leak in ocfs2_merge_rec_left()
  ocfs2: invalidate inode if i_mode is zero after block read
  ocfs2: avoid -Wflex-array-member-not-at-end warning
  ocfs2: convert remaining read-only checks to ocfs2_emergency_state
  ocfs2: add ocfs2_emergency_state helper and apply to setattr
  checkpatch: add uninitialized pointer with __free attribute check
  args: fix documentation to reflect the correct numbers
  ocfs2: fix kernel BUG in ocfs2_find_victim_chain
  liveupdate: luo_core: fix redundant bound check in luo_ioctl()
  ocfs2: validate inline xattr size and entry count in ocfs2_xattr_ibody_list
  fs/fat: remove unnecessary wrapper fat_max_cache()
  ocfs2: replace deprecated strcpy with strscpy
  ocfs2: check tl_used after reading it from trancate log inode
  liveupdate: luo_file: don't use invalid list iterator
2025-12-13 20:55:12 +12:00
Linus Torvalds
2516a87153 Patch series in this pull request:
- The 2 patch series "powerpc/pseries/cmm: two smaller fixes" from David
   Hildenbrand fixes a couple of minor things in ppc land.
 
 - The 4 patch series "Improve folio split related functions" from Zi Yan
   provides some cleanups and minorish fixes in the folio splitting code.
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Merge tag 'mm-stable-2025-12-11-11-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

 - "powerpc/pseries/cmm: two smaller fixes" (David Hildenbrand)
   fixes a couple of minor things in ppc land

 - "Improve folio split related functions" (Zi Yan)
   some cleanups and minorish fixes in the folio splitting code

* tag 'mm-stable-2025-12-11-11-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm/damon/tests/core-kunit: avoid damos_test_commit stack warning
  mm: vmscan: correct nr_requested tracing in scan_folios
  MAINTAINERS: add idr core-api doc file to XARRAY
  mm/hugetlb: fix incorrect error return from hugetlb_reserve_pages()
  mm: fix CONFIG_STACK_GROWSUP typo in mm.h
  mm/huge_memory: fix folio split stats counting
  mm/huge_memory: make min_order_for_split() always return an order
  mm/huge_memory: replace can_split_folio() with direct refcount calculation
  mm/huge_memory: change folio_split_supported() to folio_check_splittable()
  mm/sparse: fix sparse_vmemmap_init_nid_early definition without CONFIG_SPARSEMEM
  powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages
  powerpc/pseries/cmm: call balloon_devinfo_init() also without CONFIG_BALLOON_COMPACTION
2025-12-13 20:35:41 +12:00
Christian Brauner
d2ea4d254d file: ensure cleanup
Brown paper bag time. This is a silly oversight where I missed to drop
the error condition checking to ensure we clean up on early error
returns. I have an internal unit testset coming up for this which will
catch all such issues going forward.

Reported-by: Chris Mason <clm@fb.com>
Reported-by: Jeff Layton <jlayton@kernel.org>
Fixes: 011703a9ac ("file: add FD_{ADD,PREPARE}()")
Signed-off-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-12-13 20:04:32 +12:00
Linus Torvalds
d552fc632c x86/hv: Add gitignore entry for generated header file
Commit 7bfe3b8ea6 ("Drivers: hv: Introduce mshv_vtl driver") added a
new generated header file for the offsets into the mshv_vtl_cpu_context
structure to be used by the low-level assembly code.  But it didn't add
the .gitignore file to go with it, so 'git status' and friends will
mention it.

Let's add the gitignore file before somebody thinks that generated
header should be committed.

Fixes: 7bfe3b8ea6 ("Drivers: hv: Introduce mshv_vtl driver")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-12-13 19:57:41 +12:00
Linus Torvalds
a859eca0e4 drm fixes for 6.19-rc1
plane:
 - Handle IS_ERR vs NULL in drm_plane_create_hotspot_properties().
 
 ttm:
 - fix devcoredump for evicted bos
 
 panel:
 - Fix stack usage warning in novatek-nt35560.
 
 nouveau:
 - alloc fwsec sb at boot to avoid s/r problems
 - fix strcpy usage
 - fix i2c encoder crash
 
 bridge:
 - Ignore spurious PLL_UNLOCK bit in ti-sn65dsi83.
 
 mgag200:
 - Fix bigendian handling in mgag200.
 
 tilcdc:
 - Fix probe failure in tilcdc.
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Merge tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel

Pull more drm fixes from Dave Airlie:
 "These are the enqueued fixes that ended up in our fixes branch,
  nouveau mostly, along with some small fixes in other places.

  plane:
   - Handle IS_ERR vs NULL in drm_plane_create_hotspot_properties()

  ttm:
   - fix devcoredump for evicted bos

  panel:
   - Fix stack usage warning in novatek-nt35560

  nouveau:
   - alloc fwsec sb at boot to avoid s/r problems
   - fix strcpy usage
   - fix i2c encoder crash

  bridge:
   - Ignore spurious PLL_UNLOCK bit in ti-sn65dsi83

  mgag200:
   - Fix bigendian handling in mgag200

  tilcdc:
   - Fix probe failure in tilcdc"

* tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel:
  drm/mgag200: Fix big-endian support
  drm/tilcdc: Fix removal actions in case of failed probe
  drm/ttm: Avoid NULL pointer deref for evicted BOs
  drm: nouveau: Replace sprintf() with sysfs_emit()
  drm/nouveau: fix circular dep oops from vendored i2c encoder
  drm/nouveau: refactor deprecated strcpy
  drm/plane: Fix IS_ERR() vs NULL check in drm_plane_create_hotspot_properties()
  drm/bridge: ti-sn65dsi83: ignore PLL_UNLOCK errors
  drm/nouveau/gsp: Allocate fwsec-sb at boot
  drm/panel: novatek-nt35560: avoid on-stack device structure
2025-12-13 17:39:28 +12:00
Linus Torvalds
237f1bbfe3 drm next fixes for 6.19-rc1
core:
 - revert dumb bo 8 byte alignment
 
 amdgpu:
 - SI fix
 - DC reduce stack usage
 - HDMI fixes
 - VCN 4.0.5 fix
 - DP MST fix
 - DC memory allocation fix
 
 amdkfd:
 - SVM fix
 - Trap handler fix
 - VGPR fixes for GC 11.5
 
 i915:
 - Fix format string truncation warning
 - FIx runtime PM reference during fbdev BO creation
 
 panthor:
 - fix UAF
 
 renesas:
 - fix sync flag handling
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Merge tag 'drm-next-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel

Pull drm fixes from Dave Airlie:
 "This is the weekly fixes for what is in next tree, mostly amdgpu and
  some i915, panthor and a core revert.

  core:
   - revert dumb bo 8 byte alignment

  amdgpu:
   - SI fix
   - DC reduce stack usage
   - HDMI fixes
   - VCN 4.0.5 fix
   - DP MST fix
   - DC memory allocation fix

  amdkfd:
   - SVM fix
   - Trap handler fix
   - VGPR fixes for GC 11.5

  i915:
   - Fix format string truncation warning
   - FIx runtime PM reference during fbdev BO creation

  panthor:
   - fix UAF

  renesas:
   - fix sync flag handling"

* tag 'drm-next-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel:
  Revert "drm/amd/display: Fix pbn to kbps Conversion"
  drm/amd: Fix unbind/rebind for VCN 4.0.5
  drm/i915: Fix format string truncation warning
  drm/i915/fbdev: Hold runtime PM ref during fbdev BO creation
  drm/amd/display: Improve HDMI info retrieval
  drm/amdkfd: bump minimum vgpr size for gfx1151
  drm/amd/display: shrink struct members
  drm/amdkfd: Export the cwsr_size and ctl_stack_size to userspace
  drm/amd/display: Refactor dml_core_mode_support to reduce stack frame
  drm/amdgpu: don't attach the tlb fence for SI
  drm/amd/display: Use GFP_ATOMIC in dc_create_plane_state()
  drm/amdkfd: Trap handler support for expert scheduling mode
  drm/amdkfd: Use huge page size to check split svm range alignment
  drm/rcar-du: dsi: Handle both DRM_MODE_FLAG_N.SYNC and !DRM_MODE_FLAG_P.SYNC
  drm/gem-shmem: revert the 8-byte alignment constraint
  drm/gem-dma: revert the 8-byte alignment constraint
  drm/panthor: Prevent potential UAF in group creation
2025-12-13 17:25:26 +12:00
Linus Torvalds
d8cc0b917b I3C for 6.19 #2
Subsystem:
  - remove .priv_xfers
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Merge tag 'i3c/for-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

Pull further i3c update from Alexandre Belloni:
 "We are removing a legacy API callback and having this sooner rather
  than later will help ensuring no one introduces a new driver using it.

  I've also added patches removing the "__free(...) = NULL" pattern
  because I'm sure we won't avoid people sending those following the
  mailing list discussion..."

* tag 'i3c/for-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
  i3c: adi: Fix confusing cleanup.h syntax
  i3c: master: Fix confusing cleanup.h syntax
  i3c: master: cleanup callback .priv_xfers()
  i3c: master: switch to use new callback .i3c_xfers() from .priv_xfers()
2025-12-13 17:15:16 +12:00
Linus Torvalds
d324e9a915 RTC for 6.19
Subsystem:
  - stop setting max_user_freq from the individual drivers as this has not been
    hardware related for a while
 
 New drivers:
  - Andes ATCRTC100
  - Apple SMC
  - Nvidia VRS
 
 Drivers:
  - renesas-rtca3: add RZ/V2H support
  - tegra: add ACPI support
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Merge tag 'rtc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "Subsystem:
   - stop setting max_user_freq from the individual drivers as this has
     not been hardware related for a while

  New drivers:
   - Andes ATCRTC100
   - Apple SMC
   - Nvidia VRS

  Drivers:
   - renesas-rtca3: add RZ/V2H support
   - tegra: add ACPI support"

* tag 'rtc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits)
  rtc: spacemit: MFD_SPACEMIT_P1 as dependencies
  rtc: atcrtc100: Fix signedness bug in probe()
  rtc: max31335: Fix ignored return value in set_alarm
  rtc: gamecube: Check the return value of ioremap()
  Documentation: ABI: testing: Fix "upto" typo in rtc-cdev
  rtc: Add new rtc-macsmc driver for Apple Silicon Macs
  dt-bindings: rtc: Add Apple SMC RTC
  MAINTAINERS: drop unneeded file entry in NVIDIA VRS RTC DRIVER
  rtc: isl12026: Add id_table
  rtc: renesas-rtca3: Add support for multiple reset lines
  dt-bindings: rtc: renesas,rz-rtca3: Add RZ/V2H support
  rtc: tegra: Replace deprecated SIMPLE_DEV_PM_OPS
  rtc: tegra: Add ACPI support
  rtc: tegra: Use devm_clk_get_enabled() in probe
  rtc: Kconfig: add MC34708 to mc13xxx help text
  rtc: s35390a: use u8 instead of char for register buffer
  rtc: nvvrs: add NVIDIA VRS RTC device driver
  dt-bindings: rtc: Document NVIDIA VRS RTC
  rtc: atcrtc100: Add ATCRTC100 RTC driver
  MAINTAINERS: Add entry for ATCRTC100 RTC driver
  ...
2025-12-13 17:09:06 +12:00