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6271b746e4
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Mario Limonciello 6271b746e4
ASoC: dmic: Fix NULL pointer dereference 
Regulator support was introduced in commit d3321a20b5 ("ASoC: dmic: add
regulator support"). During probe `dmic->vref` is initialized with
devm_regulator_get_optional() but in the error flow doesn't get cleared in
the case that PTR_ERR(dmic->vref) is -ENODEV. This leads to the following
NULL pointer deref.

```
Oops: Oops: 0000 [#1] SMP NOPTI
CPU: 7 UID: 1000 PID: 1587 Comm: wireplumber Not tainted 6.14.0-rc7-next-20250318 #1 PREEMPT(voluntary)
RIP: 0010:regulator_enable+0x17/0x70
RSP: 0018:ffffcc10c1fe7a38 EFLAGS: 00010282
RAX: ffff8bccc1c25010 RBX: ffffffffffffffed RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffcc10c1fe7a38 RDI: ffffffffffffffed
RBP: ffffcc10c1fe7a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8bcccd51f800
R13: ffffffffc1086e88 R14: 0000000000000001 R15: 0000000000000001
FS:  00007f927bc35800(0000) GS:ffff8bd44f09f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000065 CR3: 00000001332c6000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 <TASK>
 ? show_regs+0x6c/0x80
 ? __die+0x24/0x80
 ? page_fault_oops+0x154/0x570
 ? hrtimer_start_range_ns+0x142/0x4e0
 ? timerqueue_del+0x31/0x50
 ? do_user_addr_fault+0x4ac/0x880
 ? exc_page_fault+0x82/0x1d0
 ? asm_exc_page_fault+0x27/0x30
 ? regulator_enable+0x17/0x70
 ? __schedule+0x491/0x16b0
 dmic_aif_event+0x82/0xa0 [snd_soc_dmic]
```

Adjust the error flow to explicitly set it back to NULL to avoid calling
regulator_enable() with garbage data.

Reported-by: Akshata V Unkal <Akshata.VUnkal@amd.com>
Fixes: d3321a20b5 ("ASoC: dmic: add regulator support")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20250319145636.2401680-1-superm1@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2025-03-20 18:56:49 +00:00
arch ASoC: wm8904: Add DMIC and DRC support 2025-03-20 15:35:26 +00:00
block block-6.14-20250306 2025-03-07 11:12:33 -10:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
Documentation ASoC: wm8904: Add DMIC and DRC support 2025-03-20 15:35:26 +00:00
drivers ASoC: wm8904: Add DMIC and DRC support 2025-03-20 15:35:26 +00:00
fs \n 2025-03-15 08:32:16 -10:00
include ASoC: wm8904: Add DMIC and DRC support 2025-03-20 15:35:26 +00:00
init rust: Disallow BTF generation with Rust + LTO 2025-03-11 20:11:09 +01:00
io_uring io_uring-6.14-20250306 2025-03-07 11:09:33 -10:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel Fix ref count of trace_array in error path of histogram file open 2025-03-16 09:05:00 -10:00
lib 33 hotfixes. 24 are cc:stable and the remainder address post-6.13 issues 2025-03-08 14:34:06 -10:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm Revert "fanotify: disable readahead if we have pre-content watches" 2025-03-13 16:31:12 +01:00
net netfilter pull request 25-03-13 2025-03-13 15:07:39 +01:00
rust Rust fixes for v6.14 (3rd) 2025-03-15 15:40:42 -10:00
samples Driver core api addition for 6.14-rc3 2025-02-16 12:54:42 -08:00
scripts Rust fixes for v6.14 (3rd) 2025-03-15 15:40:42 -10:00
security Landlock fix for v6.14-rc5 2025-02-26 11:55:44 -08:00
sound ASoC: dmic: Fix NULL pointer dereference 2025-03-20 18:56:49 +00:00
tools Including fixes from netfilter, bluetooth and wireless. 2025-03-13 07:58:48 -10:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-05 04:06:45 +09:00
virt KVM: remove kvm_arch_post_init_vm 2025-02-04 11:27:45 -05:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-01-10 00:17:25 +01:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: use host dylib naming convention to support macOS 2025-01-10 01:01:24 +01:00
.mailmap platform-drivers-x86 for v6.14-5 2025-03-14 10:57:28 -10:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING
CREDITS MAINTAINERS: Move Pavel to kernel.org address 2025-02-07 09:12:33 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS ASoC: wm8904: Add DMIC and DRC support 2025-03-20 15:35:26 +00:00
Makefile Linux 6.14-rc7 2025-03-16 12:55:17 -10:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.