linux-cve-announce - CVE-2025-22028: media: vimc: skip .s

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Message-ID: <2025041655-CVE-2025-22028-2ab5@gregkh>
Date: Wed, 16 Apr 2025 16:11:59 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22028: media: vimc: skip .s_stream() for stopped entities

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

media: vimc: skip .s_stream() for stopped entities

Syzbot reported [1] a warning prompted by a check in call_s_stream()
that checks whether .s_stream() operation is warranted for unstarted
or stopped subdevs.

Add a simple fix in vimc_streamer_pipeline_terminate() ensuring that
entities skip a call to .s_stream() unless they have been previously
properly started.

[1] Syzbot report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5933 at drivers/media/v4l2-core/v4l2-subdev.c:460 call_s_stream+0x2df/0x350 drivers/media/v4l2-core/v4l2-subdev.c:460
Modules linked in:
CPU: 0 UID: 0 PID: 5933 Comm: syz-executor330 Not tainted 6.13.0-rc2-syzkaller-00362-g2d8308bf5b67 #0
...
Call Trace:
 <TASK>
 vimc_streamer_pipeline_terminate+0x218/0x320 drivers/media/test-drivers/vimc/vimc-streamer.c:62
 vimc_streamer_pipeline_init drivers/media/test-drivers/vimc/vimc-streamer.c:101 [inline]
 vimc_streamer_s_stream+0x650/0x9a0 drivers/media/test-drivers/vimc/vimc-streamer.c:203
 vimc_capture_start_streaming+0xa1/0x130 drivers/media/test-drivers/vimc/vimc-capture.c:256
 vb2_start_streaming+0x15f/0x5a0 drivers/media/common/videobuf2/videobuf2-core.c:1789
 vb2_core_streamon+0x2a7/0x450 drivers/media/common/videobuf2/videobuf2-core.c:2348
 vb2_streamon drivers/media/common/videobuf2/videobuf2-v4l2.c:875 [inline]
 vb2_ioctl_streamon+0xf4/0x170 drivers/media/common/videobuf2/videobuf2-v4l2.c:1118
 __video_do_ioctl+0xaf0/0xf00 drivers/media/v4l2-core/v4l2-ioctl.c:3122
 video_usercopy+0x4d2/0x1620 drivers/media/v4l2-core/v4l2-ioctl.c:3463
 v4l2_ioctl+0x1ba/0x250 drivers/media/v4l2-core/v4l2-dev.c:366
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2b85c01b19
...

The Linux kernel CVE team has assigned CVE-2025-22028 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.1 with commit adc589d2a20808fb99d46a78175cd023f2040338 and fixed in 6.12.23 with commit 845e9286ff99ee88cfdeb2b748f730003a512190
	Issue introduced in 5.1 with commit adc589d2a20808fb99d46a78175cd023f2040338 and fixed in 6.13.11 with commit 6f6064dab4dcfb7e34a395040a0c9dc22cc8765d
	Issue introduced in 5.1 with commit adc589d2a20808fb99d46a78175cd023f2040338 and fixed in 6.14.2 with commit 7a58d4c4cf8ff60ab1f93399deefaf6057da91c7
	Issue introduced in 5.1 with commit adc589d2a20808fb99d46a78175cd023f2040338 and fixed in 6.15-rc1 with commit 36cef585e2a31e4ddf33a004b0584a7a572246de
	Issue introduced in 4.14.108 with commit 77fbb561bb09f56877dd84318212da393909975f
	Issue introduced in 4.19.31 with commit 73236bf581e96eb48808fea522351ed81e24c9cc
	Issue introduced in 5.0.4 with commit e7ae48ae47227c0302b9f4b15a5bf45934a55673

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-22028
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/media/test-drivers/vimc/vimc-streamer.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/845e9286ff99ee88cfdeb2b748f730003a512190
	https://git.kernel.org/stable/c/6f6064dab4dcfb7e34a395040a0c9dc22cc8765d
	https://git.kernel.org/stable/c/7a58d4c4cf8ff60ab1f93399deefaf6057da91c7
	https://git.kernel.org/stable/c/36cef585e2a31e4ddf33a004b0584a7a572246de