linux-cve-announce - CVE-2022-49335: drm/amdgpu/cs: make commands with 0 chunks illegal behaviour.

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Message-ID: <2025022640-CVE-2022-49335-ae62@gregkh>
Date: Wed, 26 Feb 2025 03:10:09 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49335: drm/amdgpu/cs: make commands with 0 chunks illegal behaviour.

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

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

drm/amdgpu/cs: make commands with 0 chunks illegal behaviour.

Submitting a cs with 0 chunks, causes an oops later, found trying
to execute the wrong userspace driver.

MESA_LOADER_DRIVER_OVERRIDE=v3d glxinfo

[172536.665184] BUG: kernel NULL pointer dereference, address: 00000000000001d8
[172536.665188] #PF: supervisor read access in kernel mode
[172536.665189] #PF: error_code(0x0000) - not-present page
[172536.665191] PGD 6712a0067 P4D 6712a0067 PUD 5af9ff067 PMD 0
[172536.665195] Oops: 0000 [#1] SMP NOPTI
[172536.665197] CPU: 7 PID: 2769838 Comm: glxinfo Tainted: P           O      5.10.81 #1-NixOS
[172536.665199] Hardware name: To be filled by O.E.M. To be filled by O.E.M./CROSSHAIR V FORMULA-Z, BIOS 2201 03/23/2015
[172536.665272] RIP: 0010:amdgpu_cs_ioctl+0x96/0x1ce0 [amdgpu]
[172536.665274] Code: 75 18 00 00 4c 8b b2 88 00 00 00 8b 46 08 48 89 54 24 68 49 89 f7 4c 89 5c 24 60 31 d2 4c 89 74 24 30 85 c0 0f 85 c0 01 00 00 <48> 83 ba d8 01 00 00 00 48 8b b4 24 90 00 00 00 74 16 48 8b 46 10
[172536.665276] RSP: 0018:ffffb47c0e81bbe0 EFLAGS: 00010246
[172536.665277] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[172536.665278] RDX: 0000000000000000 RSI: ffffb47c0e81be28 RDI: ffffb47c0e81bd68
[172536.665279] RBP: ffff936524080010 R08: 0000000000000000 R09: ffffb47c0e81be38
[172536.665281] R10: ffff936524080010 R11: ffff936524080000 R12: ffffb47c0e81bc40
[172536.665282] R13: ffffb47c0e81be28 R14: ffff9367bc410000 R15: ffffb47c0e81be28
[172536.665283] FS:  00007fe35e05d740(0000) GS:ffff936c1edc0000(0000) knlGS:0000000000000000
[172536.665284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[172536.665286] CR2: 00000000000001d8 CR3: 0000000532e46000 CR4: 00000000000406e0
[172536.665287] Call Trace:
[172536.665322]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
[172536.665332]  drm_ioctl_kernel+0xaa/0xf0 [drm]
[172536.665338]  drm_ioctl+0x201/0x3b0 [drm]
[172536.665369]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
[172536.665372]  ? selinux_file_ioctl+0x135/0x230
[172536.665399]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[172536.665403]  __x64_sys_ioctl+0x83/0xb0
[172536.665406]  do_syscall_64+0x33/0x40
[172536.665409]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2018

The Linux kernel CVE team has assigned CVE-2022-49335 to this issue.


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

	Fixed in 4.9.318 with commit 8189f44270db1be78169e11eec51a3eeb980bc63
	Fixed in 4.14.283 with commit aa25acbe96692e4bf8482311c293f72d8c6034c0
	Fixed in 4.19.247 with commit 15c3bcc9b5349d40207e5f8d4d799b8b4b7d13b8
	Fixed in 5.4.198 with commit c12984cdb077b9042d2dc20ca18cb16a87bcc774
	Fixed in 5.10.121 with commit be585921f29df5422a39c952d188b418ad48ffab
	Fixed in 5.15.46 with commit 70276460e914d560e96bfc208695a872fe9469c9
	Fixed in 5.17.14 with commit 20b947e5a3c74c5084d661c097517a554989d462
	Fixed in 5.18.3 with commit 7086a23890d255bb5761604e39174b20d06231a4
	Fixed in 5.19 with commit 31ab27b14daaa75541a415c6794d6f3567fea44a

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-2022-49335
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/gpu/drm/amd/amdgpu/amdgpu_cs.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/8189f44270db1be78169e11eec51a3eeb980bc63
	https://git.kernel.org/stable/c/aa25acbe96692e4bf8482311c293f72d8c6034c0
	https://git.kernel.org/stable/c/15c3bcc9b5349d40207e5f8d4d799b8b4b7d13b8
	https://git.kernel.org/stable/c/c12984cdb077b9042d2dc20ca18cb16a87bcc774
	https://git.kernel.org/stable/c/be585921f29df5422a39c952d188b418ad48ffab
	https://git.kernel.org/stable/c/70276460e914d560e96bfc208695a872fe9469c9
	https://git.kernel.org/stable/c/20b947e5a3c74c5084d661c097517a554989d462
	https://git.kernel.org/stable/c/7086a23890d255bb5761604e39174b20d06231a4
	https://git.kernel.org/stable/c/31ab27b14daaa75541a415c6794d6f3567fea44a