Commit graph

1,105,074 commits

Author SHA1 Message Date
Linus Torvalds
df0cc57e05 Linux 5.16 v5.16 2022-01-09 14:55:34 -08:00
Pablo Neira Ayuso
4a80e02698 netfilter: nft_meta: cancel register tracking after meta update
The meta expression might mangle the packet metadata, cancel register
tracking since any metadata in the registers is stale.

Finer grain register tracking cancellation by inspecting the meta type
on the register is also possible.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
cc003c7ee6 netfilter: nft_payload: cancel register tracking after payload update
The payload expression might mangle the packet, cancel register tracking
since any payload data in the registers is stale.

Finer grain register tracking cancellation by inspecting the payload
base, offset and length on the register is also possible.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
be5650f8f4 netfilter: nft_bitwise: track register operations
Check if the destination register already contains the data that this
bitwise expression performs. This allows to skip this redundant
operation.

If the destination contains a different bitwise operation, cancel the
register tracking information. If the destination contains no bitwise
operation, update the register tracking information.

Update the payload and meta expression to check if this bitwise
operation has been already performed on the register. Hence, both the
payload/meta and the bitwise expressions are reduced.

There is also a special case: If source register != destination register
and source register is not updated by a previous bitwise operation, then
transfer selector from the source register to the destination register.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
9b17afb2c8 netfilter: nft_meta: track register operations
Check if the destination register already contains the data that this
meta store expression performs. This allows to skip this redundant
operation. If the destination contains a different selector, update
the register tracking information.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
a7c176bf9f netfilter: nft_payload: track register operations
Check if the destination register already contains the data that this
payload store expression performs. This allows to skip this redundant
operation. If the destination contains a different selector, update
the register tracking information.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
12e4ecfa24 netfilter: nf_tables: add register tracking infrastructure
This patch adds new infrastructure to skip redundant selector store
operations on the same register to achieve a performance boost from
the packet path.

This is particularly noticeable in pure linear rulesets but it also
helps in rulesets which are already heaving relying in maps to avoid
ruleset linear inspection.

The idea is to keep data of the most recurrent store operations on
register to reuse them with cmp and lookup expressions.

This infrastructure allows for dynamic ruleset updates since the ruleset
blob reduction happens from the kernel.

Userspace still needs to be updated to maximize register utilization to
cooperate to improve register data reuse / reduce number of store on
register operations.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
642c8eff5c netfilter: nf_tables: add NFT_REG32_NUM
Add a definition including the maximum number of 32-bits registers that
are used a scratchpad memory area to store data.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
2c865a8a28 netfilter: nf_tables: add rule blob layout
This patch adds a blob layout per chain to represent the ruleset in the
packet datapath.

	size (unsigned long)
	struct nft_rule_dp
	  struct nft_expr
	  ...
        struct nft_rule_dp
          struct nft_expr
          ...
        struct nft_rule_dp (is_last=1)

The new structure nft_rule_dp represents the rule in a more compact way
(smaller memory footprint) compared to the control-plane nft_rule
structure.

The ruleset blob is a read-only data structure. The first field contains
the blob size, then the rules containing expressions. There is a trailing
rule which is used by the tracing infrastructure which is equivalent to
the NULL rule marker in the previous representation. The blob size field
does not include the size of this trailing rule marker.

The ruleset blob is generated from the commit path.

This patch reuses the infrastructure available since 0cbc06b3fa
("netfilter: nf_tables: remove synchronize_rcu in commit phase") to
build the array of rules per chain.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
3b9e2ea6c1 netfilter: nft_limit: move stateful fields out of expression data
In preparation for the rule blob representation.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
369b6cb5d3 netfilter: nft_limit: rename stateful structure
From struct nft_limit to nft_limit_priv.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:17 +01:00
Pablo Neira Ayuso
567882eb3d netfilter: nft_numgen: move stateful fields out of expression data
In preparation for the rule blob representation.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:16 +01:00
Pablo Neira Ayuso
ed0a0c60f0 netfilter: nft_quota: move stateful fields out of expression data
In preparation for the rule blob representation.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:16 +01:00
Pablo Neira Ayuso
33a24de37e netfilter: nft_last: move stateful fields out of expression data
In preparation for the rule blob representation.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:16 +01:00
Pablo Neira Ayuso
37f319f37d netfilter: nft_connlimit: move stateful fields out of expression data
In preparation for the rule blob representation.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:16 +01:00
Florian Westphal
6316136ec6 netfilter: egress: avoid a lockdep splat
include/linux/netfilter_netdev.h:97 suspicious rcu_dereference_check() usage!
2 locks held by sd-resolve/1100:
 0: ..(rcu_read_lock_bh){1:3}, at: ip_finish_output2
 1: ..(rcu_read_lock_bh){1:3}, at: __dev_queue_xmit
 __dev_queue_xmit+0 ..

The helper has two callers, one uses rcu_read_lock, the other
rcu_read_lock_bh().  Annotate the dereference to reflect this.

Fixes: 42df6e1d22 ("netfilter: Introduce egress hook")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:35:16 +01:00
Florian Westphal
408bdcfce8 net: prefer nf_ct_put instead of nf_conntrack_put
Its the same as nf_conntrack_put(), but without the
need for an indirect call.  The downside is a module dependency on
nf_conntrack, but all of these already depend on conntrack anyway.

Cc: Paul Blakey <paulb@mellanox.com>
Cc: dev@openvswitch.org
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:14 +01:00
Florian Westphal
6ae7989c9a netfilter: conntrack: avoid useless indirection during conntrack destruction
nf_ct_put() results in a usesless indirection:

nf_ct_put -> nf_conntrack_put -> nf_conntrack_destroy -> rcu readlock +
indirect call of ct_hooks->destroy().

There are two _put helpers:
nf_ct_put and nf_conntrack_put.  The latter is what should be used in
code that MUST NOT cause a linker dependency on the conntrack module
(e.g. calls from core network stack).

Everyone else should call nf_ct_put() instead.

A followup patch will convert a few nf_conntrack_put() calls to
nf_ct_put(), in particular from modules that already have a conntrack
dependency such as act_ct or even nf_conntrack itself.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:13 +01:00
Florian Westphal
285c8a7a58 netfilter: make function op structures const
No functional changes, these structures should be const.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:13 +01:00
Florian Westphal
3fce16493d netfilter: core: move ip_ct_attach indirection to struct nf_ct_hook
ip_ct_attach predates struct nf_ct_hook, we can place it there and
remove the exported symbol.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:13 +01:00
Florian Westphal
7197743776 netfilter: conntrack: convert to refcount_t api
Convert nf_conn reference counting from atomic_t to refcount_t based api.
refcount_t api provides more runtime sanity checks and will warn on
certain constructs, e.g. refcount_inc() on a zero reference count, which
usually indicates use-after-free.

For this reason template allocation is changed to init the refcount to
1, the subsequenct add operations are removed.

Likewise, init_conntrack() is changed to set the initial refcount to 1
instead refcount_inc().

This is safe because the new entry is not (yet) visible to other cpus.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:13 +01:00
Jiapeng Chong
613a0c67d1 netfilter: conntrack: Use max() instead of doing it manually
Fix following coccicheck warning:

./include/net/netfilter/nf_conntrack.h:282:16-17: WARNING opportunity
for max().

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2022-01-09 23:30:13 +01:00
Jakub Kicinski
9f3248c9dd bluetooth-next pull request for net-next:
- Add support for Foxconn QCA 0xe0d0
  - Fix HCI init sequence on MacBook Air 8,1 and 8,2
  - Fix Intel firmware loading on legacy ROM devices
 -----BEGIN PGP SIGNATURE-----
 
 iQJNBAABCAA3FiEE7E6oRXp8w05ovYr/9JCA4xAyCykFAmHYqGkZHGx1aXoudm9u
 LmRlbnR6QGludGVsLmNvbQAKCRD0kIDjEDILKaluD/wMeLJEZFGBK1Wwek4UPE8U
 2ytS3n7EfebtIMHpXMPMH+lxsY6+GxH9bzc6JK5yWXr1S/Fny2U6spQFnRra/dvI
 Y6aauMjcCLKJiZvA7l9n79W3Cx3WpszT3Jqcz3ozvcQQG3+tOxdBsisKFi3YCdx8
 U8TWHyajM3a+3Rmi5uCdpZkFC927vtta1GfgrnKhtztBPLilyRKPekjZ0vFv3CmG
 5IvCglLJPqJtw8UtkXT5TENQptcQhMeFLy5JcGKdbFX9H4y2TobRSHpUtBOE0xOg
 f8lENUGRr3TFK2HmQfKK/jS88TS4yhSjsI1ejKoto5f0csUcwIbznoAqiGV4S+AZ
 t9+t9fq9iAHfr8X9ccm4t9x+ggdMIUgmSNaO9uk1bDsJSB+eTqwBfuGGEMgkc1HN
 Wrg/XOaAd6aOi+sXjnDegpWRhuC/KsTjp0P9gRkLK+1OiM5qcfMnBRoUk5kmazFq
 j2QRFORRSGHamqBWDvwymVUKeZ3odRr4qiMkIYHyzsVx7XvMpxL5WAgwr2p0KC4d
 rh/X6xTHIF9aDing5L9SjLJH6Zia/5mdToMPDLkV9Y8mfXFXg+Dc46lNmSBY0row
 atQZNd4QLIUr44ahcAvWW0zX4r7wbOft8epWm/Lf6qEUReHHCRtt0PC1givnqy0I
 J1CfiKLibsLI5FzhuH2b6w==
 =q2FV
 -----END PGP SIGNATURE-----

Merge tag 'for-net-next-2022-01-07' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Luiz Augusto von Dentz says:

====================
bluetooth-next pull request for net-next:

 - Add support for Foxconn QCA 0xe0d0
 - Fix HCI init sequence on MacBook Air 8,1 and 8,2
 - Fix Intel firmware loading on legacy ROM devices

* tag 'for-net-next-2022-01-07' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next:
  Bluetooth: hci_sock: fix endian bug in hci_sock_setsockopt()
  Bluetooth: L2CAP: uninitialized variables in l2cap_sock_setsockopt()
  Bluetooth: btqca: sequential validation
  Bluetooth: btusb: Add support for Foxconn QCA 0xe0d0
  Bluetooth: btintel: Fix broken LED quirk for legacy ROM devices
  Bluetooth: hci_event: Rework hci_inquiry_result_with_rssi_evt
  Bluetooth: btbcm: disable read tx power for MacBook Air 8,1 and 8,2
  Bluetooth: hci_qca: Fix NULL vs IS_ERR_OR_NULL check in qca_serdev_probe
  Bluetooth: hci_bcm: Check for error irq
====================

Link: https://lore.kernel.org/r/20220107210942.3750887-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-01-09 14:14:09 -08:00
Jakub Kicinski
f4bb93a82f linux-can-fixes-for-5.16-20220109
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEK3kIWJt9yTYMP3ehqclaivrt76kFAmHa1ooTHG1rbEBwZW5n
 dXRyb25peC5kZQAKCRCpyVqK+u3vqX7nCACF0MLpkLANdtNRrGTnxMlfX5rVqX7q
 exDeWJrBP1pMQVC4S8Tr6B+bWiq9z9GlXTNcP0xCJMgqGuy/2EOT4xWxeS2cV6fp
 Q/ZyV2MJN/DV/wmP3Ak3K1DZzDZBiXBjqE2CLOu3xWI7IiiBC0iXeKNjfwYvYjvh
 ZrJmqVwIKQ0zV3q+yeUepfTdwJi66QsaFVqvpojHQJxJI3TPgXTPds435zVpEfHi
 pNwA/WWjv+dYp1E5qODXihtXFTHZocwOXDK62YZF3lYMfybjLsHbuIr5BPcP7VnC
 ctpKNze/ObNo6rYV2pLj0/LJDu1cKegG1il7XDkvWujBKzDR4EgNttoR
 =xYnc
 -----END PGP SIGNATURE-----

Merge tag 'linux-can-fixes-for-5.16-20220109' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2022-01-09

The first patch is by Johan Hovold and fixes a mem leak in the error
path of the softing_cs driver.

The next patch is by me and fixes a set but not used variable warning
in the softing driver.

Jiasheng Jiang's patch for the xilinx_can driver adds the missing
error checking when getting the IRQ.

Lad Prabhakar contributes a patch for the rcar_canfd driver to fix a
mem leak in the error path.

The last patch is by Brian Silverman and properly initializes the send
USB messages to avoid spurious CAN error frames.

* tag 'linux-can-fixes-for-5.16-20220109' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
  can: gs_usb: gs_can_start_xmit(): zero-initialize hf->{flags,reserved}
  can: rcar_canfd: rcar_canfd_channel_probe(): make sure we free CAN network device
  can: xilinx_can: xcan_probe(): check for error irq
  can: softing: softing_startstop(): fix set but not used variable warning
  can: softing_cs: softingcs_probe(): fix memleak on registration failure
====================

Link: https://lore.kernel.org/r/20220109134040.1945428-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-01-09 14:00:49 -08:00
Jisheng Zhang
b0fd4b1bf9
riscv: mm: fix wrong phys_ram_base value for RV64
Currently, if 64BIT and !XIP_KERNEL, the phys_ram_base is always 0,
no matter the real start of dram reported by memblock is.

Fixes: 6d7f91d914 ("riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion")
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 13:51:48 -08:00
Zhihao Cheng
716b457302 ubifs: Add missing iput if do_tmpfile() failed in rename whiteout
whiteout inode should be put when do_tmpfile() failed if inode has been
initialized. Otherwise we will get following warning during umount:
  UBIFS error (ubi0:0 pid 1494): ubifs_assert_failed [ubifs]: UBIFS
  assert failed: c->bi.dd_growth == 0, in fs/ubifs/super.c:1930
  VFS: Busy inodes after unmount of ubifs. Self-destruct in 5 seconds.

Fixes: 9e0a1fff8d ("ubifs: Implement RENAME_WHITEOUT")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-01-09 21:47:05 +01:00
Zhihao Cheng
7a8884feec ubifs: Fix wrong number of inodes locked by ui_mutex in ubifs_inode comment
Since 9ec64962afb1702f75b("ubifs: Implement RENAME_EXCHANGE") and
9e0a1fff8db56eaaebb("ubifs: Implement RENAME_WHITEOUT") are applied,
ubifs_rename locks and changes 4 ubifs inodes, correct the comment
for ui_mutex in ubifs_inode.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-01-09 21:35:38 +01:00
Zhihao Cheng
afd4270480 ubifs: Fix deadlock in concurrent rename whiteout and inode writeback
Following hung tasks:
[   77.028764] task:kworker/u8:4    state:D stack:    0 pid:  132
[   77.028820] Call Trace:
[   77.029027]  schedule+0x8c/0x1b0
[   77.029067]  mutex_lock+0x50/0x60
[   77.029074]  ubifs_write_inode+0x68/0x1f0 [ubifs]
[   77.029117]  __writeback_single_inode+0x43c/0x570
[   77.029128]  writeback_sb_inodes+0x259/0x740
[   77.029148]  wb_writeback+0x107/0x4d0
[   77.029163]  wb_workfn+0x162/0x7b0

[   92.390442] task:aa              state:D stack:    0 pid: 1506
[   92.390448] Call Trace:
[   92.390458]  schedule+0x8c/0x1b0
[   92.390461]  wb_wait_for_completion+0x82/0xd0
[   92.390469]  __writeback_inodes_sb_nr+0xb2/0x110
[   92.390472]  writeback_inodes_sb_nr+0x14/0x20
[   92.390476]  ubifs_budget_space+0x705/0xdd0 [ubifs]
[   92.390503]  do_rename.cold+0x7f/0x187 [ubifs]
[   92.390549]  ubifs_rename+0x8b/0x180 [ubifs]
[   92.390571]  vfs_rename+0xdb2/0x1170
[   92.390580]  do_renameat2+0x554/0x770

, are caused by concurrent rename whiteout and inode writeback processes:
	rename_whiteout(Thread 1)	        wb_workfn(Thread2)
ubifs_rename
  do_rename
    lock_4_inodes (Hold ui_mutex)
    ubifs_budget_space
      make_free_space
        shrink_liability
	  __writeback_inodes_sb_nr
	    bdi_split_work_to_wbs (Queue new wb work)
					      wb_do_writeback(wb work)
						__writeback_single_inode
					          ubifs_write_inode
					            LOCK(ui_mutex)
							   ↑
	      wb_wait_for_completion (Wait wb work) <-- deadlock!

Reproducer (Detail program in [Link]):
  1. SYS_renameat2("/mp/dir/file", "/mp/dir/whiteout", RENAME_WHITEOUT)
  2. Consume out of space before kernel(mdelay) doing budget for whiteout

Fix it by doing whiteout space budget before locking ubifs inodes.
BTW, it also fixes wrong goto tag 'out_release' in whiteout budget
error handling path(It should at least recover dir i_size and unlock
4 ubifs inodes).

Fixes: 9e0a1fff8d ("ubifs: Implement RENAME_WHITEOUT")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=214733
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-01-09 21:33:25 +01:00
Dominik Brodowski
fbb3485f1f pcmcia: fix setting of kthread task states
We need to set TASK_INTERRUPTIBLE before calling kthread_should_stop().
Otherwise, kthread_stop() might see that the pccardd thread is still
in TASK_RUNNING state and fail to wake it up.

Additionally, we only need to set the state back to TASK_RUNNING if
kthread_should_stop() breaks the loop.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Fixes: d3046ba809 ("pcmcia: fix a boot time warning in pcmcia cs code")
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2022-01-09 21:30:04 +01:00
Zhihao Cheng
40a8f0d5e7 ubifs: rename_whiteout: Fix double free for whiteout_ui->data
'whiteout_ui->data' will be freed twice if space budget fail for
rename whiteout operation as following process:

rename_whiteout
  dev = kmalloc
  whiteout_ui->data = dev
  kfree(whiteout_ui->data)  // Free first time
  iput(whiteout)
    ubifs_free_inode
      kfree(ui->data)	    // Double free!

KASAN reports:
==================================================================
BUG: KASAN: double-free or invalid-free in ubifs_free_inode+0x4f/0x70
Call Trace:
  kfree+0x117/0x490
  ubifs_free_inode+0x4f/0x70 [ubifs]
  i_callback+0x30/0x60
  rcu_do_batch+0x366/0xac0
  __do_softirq+0x133/0x57f

Allocated by task 1506:
  kmem_cache_alloc_trace+0x3c2/0x7a0
  do_rename+0x9b7/0x1150 [ubifs]
  ubifs_rename+0x106/0x1f0 [ubifs]
  do_syscall_64+0x35/0x80

Freed by task 1506:
  kfree+0x117/0x490
  do_rename.cold+0x53/0x8a [ubifs]
  ubifs_rename+0x106/0x1f0 [ubifs]
  do_syscall_64+0x35/0x80

The buggy address belongs to the object at ffff88810238bed8 which
belongs to the cache kmalloc-8 of size 8
==================================================================

Let ubifs_free_inode() free 'whiteout_ui->data'. BTW, delete unused
assignment 'whiteout_ui->data_len = 0', process 'ubifs_evict_inode()
-> ubifs_jnl_delete_inode() -> ubifs_jnl_write_inode()' doesn't need it
(because 'inc_nlink(whiteout)' won't be excuted by 'goto out_release',
 and the nlink of whiteout inode is 0).

Fixes: 9e0a1fff8d ("ubifs: Implement RENAME_WHITEOUT")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-01-09 21:25:01 +01:00
Sean Christopherson
869c706092
RISC-V: Use common riscv_cpuid_to_hartid_mask() for both SMP=y and SMP=n
Use what is currently the SMP=y version of riscv_cpuid_to_hartid_mask()
for both SMP=y and SMP=n to fix a build failure with KVM=m and SMP=n due
to boot_cpu_hartid not being exported.  This also fixes a second bug
where the SMP=n version assumes the sole CPU in the system is in the
incoming mask, which may not hold true in kvm_riscv_vcpu_sbi_ecall() if
the KVM guest VM has multiple vCPUs (on a SMP=n system).

Fixes: 1ef46c231d ("RISC-V: Implement new SBI v0.2 extensions")
Reported-by: Adam Borowski <kilobyte@angband.pl>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 12:13:31 -08:00
Baokun Li
3cbf0e392f ubi: Fix race condition between ctrl_cdev_ioctl and ubi_cdev_ioctl
Hulk Robot reported a KASAN report about use-after-free:
 ==================================================================
 BUG: KASAN: use-after-free in __list_del_entry_valid+0x13d/0x160
 Read of size 8 at addr ffff888035e37d98 by task ubiattach/1385
 [...]
 Call Trace:
  klist_dec_and_del+0xa7/0x4a0
  klist_put+0xc7/0x1a0
  device_del+0x4d4/0xed0
  cdev_device_del+0x1a/0x80
  ubi_attach_mtd_dev+0x2951/0x34b0 [ubi]
  ctrl_cdev_ioctl+0x286/0x2f0 [ubi]

 Allocated by task 1414:
  device_add+0x60a/0x18b0
  cdev_device_add+0x103/0x170
  ubi_create_volume+0x1118/0x1a10 [ubi]
  ubi_cdev_ioctl+0xb7f/0x1ba0 [ubi]

 Freed by task 1385:
  cdev_device_del+0x1a/0x80
  ubi_remove_volume+0x438/0x6c0 [ubi]
  ubi_cdev_ioctl+0xbf4/0x1ba0 [ubi]
 [...]
 ==================================================================

The lock held by ctrl_cdev_ioctl is ubi_devices_mutex, but the lock held
by ubi_cdev_ioctl is ubi->device_mutex. Therefore, the two locks can be
concurrent.

ctrl_cdev_ioctl contains two operations: ubi_attach and ubi_detach.
ubi_detach is bug-free because it uses reference counting to prevent
concurrency. However, uif_init and uif_close in ubi_attach may race with
ubi_cdev_ioctl.

uif_init will race with ubi_cdev_ioctl as in the following stack.
           cpu1                   cpu2                  cpu3
_______________________|________________________|______________________
ctrl_cdev_ioctl
 ubi_attach_mtd_dev
  uif_init
                           ubi_cdev_ioctl
                            ubi_create_volume
                             cdev_device_add
   ubi_add_volume
   // sysfs exist
   kill_volumes
                                                    ubi_cdev_ioctl
                                                     ubi_remove_volume
                                                      cdev_device_del
                                                       // first free
    ubi_free_volume
     cdev_del
     // double free
   cdev_device_del

And uif_close will race with ubi_cdev_ioctl as in the following stack.
           cpu1                   cpu2                  cpu3
_______________________|________________________|______________________
ctrl_cdev_ioctl
 ubi_attach_mtd_dev
  uif_init
                           ubi_cdev_ioctl
                            ubi_create_volume
                             cdev_device_add
  ubi_debugfs_init_dev
  //error goto out_uif;
  uif_close
   kill_volumes
                                                    ubi_cdev_ioctl
                                                     ubi_remove_volume
                                                      cdev_device_del
                                                       // first free
    ubi_free_volume
    // double free

The cause of this problem is that commit 714fb87e8b make device
"available" before it becomes accessible via sysfs. Therefore, we
roll back the modification. We will fix the race condition between
ubi device creation and udev by removing ubi_get_device in
vol_attribute_show and dev_attribute_show.This avoids accessing
uninitialized ubi_devices[ubi_num].

ubi_get_device is used to prevent devices from being deleted during
sysfs execution. However, now kernfs ensures that devices will not
be deleted before all reference counting are released.
The key process is shown in the following stack.

device_del
  device_remove_attrs
    device_remove_groups
      sysfs_remove_groups
        sysfs_remove_group
          remove_files
            kernfs_remove_by_name
              kernfs_remove_by_name_ns
                __kernfs_remove
                  kernfs_drain

Fixes: 714fb87e8b ("ubi: Fix race condition between ubi device creation and udev")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-01-09 21:13:28 +01:00
Jisheng Zhang
51f23e5318
riscv: head: remove useless __PAGE_ALIGNED_BSS and .balign
After commit 83e7b8769a ("RISC-V: move empty_zero_page definition to
C and export it"), the empty_zero_page has been moved outside head.S,
the __PAGE_ALIGNED_BSS and .balign LoCs are useless, clean up them.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 11:02:49 -08:00
Jisheng Zhang
1546541fbc
riscv: errata: alternative: mark vendor_patch_func __initdata
The function pointer vendor_patch_func is only used during init, so
mark it as __initdata.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 11:02:46 -08:00
Jisheng Zhang
153c46faf6
riscv: head: make secondary_start_common() static
There are no users outside head.S so make secondary_start_common()
static.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 11:02:42 -08:00
Jisheng Zhang
7f3de1adb3
riscv: remove cpu_stop()
Except arch_cpu_idle_dead(), no users of this function. So remove
cpu_stop() and fold its code into arch_cpu_idle_dead().

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 11:02:39 -08:00
Linus Torvalds
e900deb248 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fix from Dmitry Torokhov:
 "A small fixup to the Zinitix touchscreen driver to avoid enabling the
  IRQ line before we successfully requested it"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: zinitix - make sure the IRQ is allocated before it gets enabled
2022-01-09 10:49:12 -08:00
Linus Torvalds
95350123bb SoC: One more fix for 5.16
I had missed one patch when I sent up what I thought was the last batch
 of fixes for this release. This one fixes issues on the Raspberry Pi
 platforms due to gpio init changes this release, so hopefully we can get
 it merged before final release is cut.
 -----BEGIN PGP SIGNATURE-----
 
 iQJDBAABCgAtFiEElf+HevZ4QCAJmMQ+jBrnPN6EHHcFAmHajUQPHG9sb2ZAbGl4
 b20ubmV0AAoJEIwa5zzehBx3vPwP/0YAs8IS7TcSzSNa4c5OTYxCg3Ly+AFYoUjg
 49Fe7NDhZu1Msp7uQNy8KqwoafMJglr45ZkM28i2CgfjvI0Tm98XxvUPUQra26Rb
 30RkrF2o2hTrfEIgliJAn9+jJKk9NRiToQpigos/1f94f9jSKD+ZjwLRz1mDraPs
 pzLqNlLtxl4AAByHPdA7L0XM83j1W32hhHjyaf1DsS1edM99CdlZtVtRGRhDFkDx
 /maMZj1frY11d7XrJK2blTgvdmH9p8VaGW0SsqhqOUyxhSGV1H8a05it55Jsud7R
 7ZvSuXCas93Zf6y48KHKewyNCHlBsW4rtn0IVcEi9zhU/hhCvJrjDJ8fEiJOIoxq
 9M2AU6fkZ1mXlX3jHf3w/7pJH6nuzg/1g9xiXS2w7IIyTLSbU9bIC7CrXqZBY7WA
 WStP/H0Yro7tQoLk0IG/RkiqGyw+ohIELpnOOCvtfAYja71kI0ns8ubEFZpuunPe
 h/ohPH2Y3+EzMmM7HcVrk7dtVMmjjhUovKn6Ms+RHoyIifZsi85F3wjxbG4CATYb
 NdUriI7JxzJV2UYF1vijyq8mTrrYjmW398KLz1CXS6UGiX0pwAoENHd8tmA4Rmgc
 GyuuRc9ROXHBEM31cvBxCKRNJnk+LaDYyLJUGi2oAexVnoA23JhJcJQXvSTBFrhL
 a2jtpoL+
 =8fGJ
 -----END PGP SIGNATURE-----

Merge tag 'soc-fixes-5.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC fix from Olof Johansson:
 "One more fix for 5.16

  I had missed one patch when I sent up what I thought was the last
  batch of fixes for this release. This one fixes issues on the
  Raspberry Pi platforms due to gpio init changes this release, so
  hopefully we can get it merged before final release is cut"

* tag 'soc-fixes-5.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: dts: gpio-ranges property is now required
2022-01-09 10:43:16 -08:00
Nick Kossifidis
decf89f86e
riscv: try to allocate crashkern region from 32bit addressible memory
When allocating crash kernel region without explicitly specifying its
base address/size, memblock_phys_alloc_range will attempt to allocate
memory top to bottom (memblock.bottom_up is false), so the crash
kernel region will end up in highmem on 64bit systems. This way
swiotlb can't work on the crash kernel, since there won't be any
32bit addressible memory available for the bounce buffers.

Try to allocate 32bit addressible memory if available, for the
crash kernel by restricting the top search address to be less
than SZ_4G. If that fails fallback to the previous behavior.

I tested this on HiFive Unmatched where the pci-e controller needs
swiotlb to work, with this patch it's possible to access the pci-e
controller on crash kernel and mount the rootfs from the nvme.

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Fixes: e53d28180d ("RISC-V: Add kdump support")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:40:14 -08:00
Nick Kossifidis
0e105f1d00
riscv: use hart id instead of cpu id on machine_kexec
raw_smp_processor_id() doesn't return the hart id as stated in
arch/riscv/include/asm/smp.h, use smp_processor_id() instead
to get the cpu id, and cpuid_to_hartid_map() to pass the hart id
to the next kernel. This fixes kexec on HiFive Unleashed/Unmatched
where cpu ids and hart ids don't match (on qemu-virt they match).

Fixes: fba8a8674f ("RISC-V: Add kexec support")
Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:40:00 -08:00
Nick Kossifidis
a11c07f032
riscv: Don't use va_pa_offset on kdump
On kdump instead of using an intermediate step to relocate the kernel,
that lives in a "control buffer" outside the current kernel's mapping,
we jump to the crash kernel directly by calling riscv_kexec_norelocate().
The current implementation uses va_pa_offset while switching to physical
addressing, however since we moved the kernel outside the linear mapping
this won't work anymore since riscv_kexec_norelocate() is part of the
kernel mapping and we should use kernel_map.va_kernel_pa_offset, and also
take XIP kernel into account.

We don't really need to use va_pa_offset on riscv_kexec_norelocate, we
can just set STVEC to the physical address of the new kernel instead and
let the hart jump to the new kernel on the next instruction after setting
SATP to zero. This fixes kdump and is also simpler/cleaner.

I tested this on the latest qemu and HiFive Unmatched and works as
expected.

Fixes: 2bfc6cd81b ("riscv: Move kernel mapping outside of linear mapping")
Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:38:06 -08:00
Linus Torvalds
9a12a5aa17 perf tools fixes for v5.16: 6th batch
- Revert "libtraceevent: Increase libtraceevent logging when verbose", breaks the build
   with libtraceevent-1.3.0, i.e. when building with 'LIBTRACEEVENT_DYNAMIC=1'.
 
 - Avoid early exit in 'perf trace' due to running SIGCHLD handler before it
   makes sense to.  It can happen when using a BPF source code event that have
   to be first built into an object file.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCYdrrXQAKCRCyPKLppCJ+
 J1KLAPwKLu7Mxj5sc0EMB3WJr48PUTaAzNt9GYhfxuok3x6bBgEAvXQL5olib/0A
 9sLhZrKVHqeQKApgFtkzOVT6DoNVwwg=
 =0r49
 -----END PGP SIGNATURE-----

Merge tag 'perf-tools-fixes-for-v5.16-2022-01-09' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Revert "libtraceevent: Increase libtraceevent logging when verbose",
   breaks the build with libtraceevent-1.3.0, i.e. when building with
   'LIBTRACEEVENT_DYNAMIC=1'.

 - Avoid early exit in 'perf trace' due to running SIGCHLD handler
   before it makes sense to. It can happen when using a BPF source code
   event that have to be first built into an object file.

* tag 'perf-tools-fixes-for-v5.16-2022-01-09' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  Revert "libtraceevent: Increase libtraceevent logging when verbose"
  perf trace: Avoid early exit due to running SIGCHLD handler before it makes sense to
2022-01-09 10:37:07 -08:00
Len Brown
df5bc0aa7f Revert "drm/amdgpu: stop scheduler when calling hw_fini (v2)"
This reverts commit f7d6779df6.

This bisected regression has impacted suspend-resume stability
since 5.15-rc1. It regressed -stable via 5.14.10.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215315
Fixes: f7d6779df6 ("drm/amdgpu: stop scheduler when calling hw_fini (v2)")
Cc: Guchun Chen <guchun.chen@amd.com>
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: <stable@vger.kernel.org> # 5.14+
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-09 10:32:16 -08:00
Arnd Bergmann
0ea9fc15b1 fs/locks: fix fcntl_getlk64/fcntl_setlk64 stub prototypes
My patch to rework oabi fcntl64() introduced a harmless
sparse warning when file locking is disabled:

   arch/arm/kernel/sys_oabi-compat.c:251:51: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected struct flock64 [noderef] __user *user @@     got struct flock64 * @@
   arch/arm/kernel/sys_oabi-compat.c:251:51: sparse:     expected struct flock64 [noderef] __user *user
   arch/arm/kernel/sys_oabi-compat.c:251:51: sparse:     got struct flock64 *
   arch/arm/kernel/sys_oabi-compat.c:265:55: sparse: sparse: incorrect type in argument 4 (different address spaces) @@     expected struct flock64 [noderef] __user *user @@     got struct flock64 * @@
   arch/arm/kernel/sys_oabi-compat.c:265:55: sparse:     expected struct flock64 [noderef] __user *user
   arch/arm/kernel/sys_oabi-compat.c:265:55: sparse:     got struct flock64 *

When file locking is enabled, everything works correctly and the
right data gets passed, but the stub declarations in linux/fs.h
did not get modified when the calling conventions changed in an
earlier patch.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 7e2d8c29ec ("ARM: 9111/1: oabi-compat: rework fcntl64() emulation")
Fixes: a75d30c772 ("fs/locks: pass kernel struct flock to fcntl_getlk/setlk")
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2022-01-09 13:23:00 -05:00
Geert Uytterhoeven
893eae9ac7
riscv: dts: sifive: fu540-c000: Fix PLIC node
Fix the device node for the Platform-Level Interrupt Controller (PLIC):
  - Add missing "#address-cells" property,
  - Sort properties according to DT bindings.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:44 -08:00
Geert Uytterhoeven
8fc6e62a54
riscv: dts: sifive: fu540-c000: Drop bogus soc node compatible values
"make dtbs_check":

    arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dt.yaml: soc: $nodename:0: '/' was expected
    	From schema: Documentation/devicetree/bindings/riscv/sifive.yaml
    arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dt.yaml: soc: compatible: 'oneOf' conditional failed, one must be fixed:
    	'sifive,fu540-c000' is not one of ['sifive,hifive-unleashed-a00']
    	'sifive,fu540-c000' is not one of ['sifive,hifive-unmatched-a00']
    	'sifive,fu540-c000' was expected
    	'sifive,fu740-c000' was expected
    	'sifive,fu540' was expected
    	'sifive,fu740' was expected
    	From schema: Documentation/devicetree/bindings/riscv/sifive.yaml

This happens because the "soc" subnode declares compatibility with
"sifive,fu540-c000" and "sifive,fu540", while these are only intended
for the root node.

Fix this by removing the bogus compatible values from the "soc" node.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:40 -08:00
Geert Uytterhoeven
8e9b1c9555
riscv: dts: sifive: Group tuples in register properties
To improve human readability and enable automatic validation, the tuples
in "reg" properties containing register blocks should be grouped using
angle brackets.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:36 -08:00
Geert Uytterhoeven
cc79be0e0c
riscv: dts: sifive: Group tuples in interrupt properties
To improve human readability and enable automatic validation, the tuples
in the various properties containing interrupt specifiers should be
grouped.

Fix this by grouping the tuples of "interrupts" and
"interrupts-extended" properties using angle brackets.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:32 -08:00
Geert Uytterhoeven
e35b07a7df
riscv: dts: microchip: mpfs: Group tuples in interrupt properties
To improve human readability and enable automatic validation, the tuples
in the various properties containing interrupt specifiers should be
grouped.

Fix this by grouping the tuples of "interrupts" and
"interrupts-extended" properties using angle brackets.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:28 -08:00
Geert Uytterhoeven
9e85020ccf
riscv: dts: microchip: mpfs: Fix clock controller node
Fix the device node for the clock controller:
  - Remove bogus "reg-names" property,
  - Remove unneeded "clock-output-names" property.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-01-09 10:11:22 -08:00