From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D10321C174 for ; Wed, 26 Feb 2025 02:28:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536883; cv=none; b=VnhGRoGVkeuie0lrEbCzYPuhiKCuO87JRfEyW80W63LQV4rbMfca2REegjrcIppyNEnshagPJOhnGMThbODXXjYWtH/eybZFmnc86hqes0fUtFjxPjAMAXmknjvZhjJnjKf/BgnHCoLnkQfWd9MwTcsOtnahuCyO/FKY6E7//dY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536883; c=relaxed/simple; bh=skoRRozSH6nr5DAOZKgA4tVuO9okW3nx5Tjwv+8PxSU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=AwJXH0QCJC1P0iMKm77zWY5EYsAuTNsDg3EthM8jpg+bcnM+S/xRlnrUvVmCftb2BITnWOMhjXwywZbhbFfMpkRaDsSSOyS4mYwfpLZA+9OhOtQqsx4UzYtHZSA18u5cWZyNYVCuL+bo0PEj+1/6HOkkn5rwUY33WPNmZbl593E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=X9dTxeZJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="X9dTxeZJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FC1AC4CEDD; Wed, 26 Feb 2025 02:28:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740536883; bh=skoRRozSH6nr5DAOZKgA4tVuO9okW3nx5Tjwv+8PxSU=; h=From:To:Cc:Subject:Date:Reply-to:From; b=X9dTxeZJI4hJPhrxZdhaWO05OjiPn4qDLxSeLALz1U/6ekCa6dWJihXarlRoEdhph e7Vvo1sfOb9K5tRoceajbmceK5i0GAN4KbtU9QzLKUFAk00uS/nLM+1qQQo36NZKcb 6WP5MWJays/i/ahjiAomAEzGkPExlGmgyrAwsQkU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49723: drm/i915/reset: Fix error_state_read ptr + offset use Date: Wed, 26 Feb 2025 03:24:46 +0100 Message-ID: <2025022633-CVE-2022-49723-ac32@gregkh> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=6648; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=skoRRozSH6nr5DAOZKgA4tVuO9okW3nx5Tjwv+8PxSU=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7ql5qcBWb+CzTaFlYkxprzaVStO1P3eEbrRyLzR85J c+sTAnpiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIlc280wV/rHhuYNv7JPz/W5 kWYgceqkSgVXK8P8dCZVuZLmFTP+rmO6fkR6wQImTosgAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: drm/i915/reset: Fix error_state_read ptr + offset use Fix our pointer offset usage in error_state_read when there is no i915_gpu_coredump but buf offset is non-zero. This fixes a kernel page fault can happen when multiple tests are running concurrently in a loop and one is producing engine resets and consuming the i915 error_state dump while the other is forcing full GT resets. (takes a while to trigger). The dmesg call trace: [ 5590.803000] BUG: unable to handle page fault for address: ffffffffa0b0e000 [ 5590.803009] #PF: supervisor read access in kernel mode [ 5590.803013] #PF: error_code(0x0000) - not-present page [ 5590.803016] PGD 5814067 P4D 5814067 PUD 5815063 PMD 109de4067 PTE 0 [ 5590.803022] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 5590.803026] CPU: 5 PID: 13656 Comm: i915_hangman Tainted: G U 5.17.0-rc5-ups69-guc-err-capt-rev6+ #136 [ 5590.803033] Hardware name: Intel Corporation Alder Lake Client Platform/AlderLake-M LP4x RVP, BIOS ADLPFWI1.R00. 3031.A02.2201171222 01/17/2022 [ 5590.803039] RIP: 0010:memcpy_erms+0x6/0x10 [ 5590.803045] Code: fe ff ff cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe [ 5590.803054] RSP: 0018:ffffc90003a8fdf0 EFLAGS: 00010282 [ 5590.803057] RAX: ffff888107ee9000 RBX: ffff888108cb1a00 RCX: 0000000000000f8f [ 5590.803061] RDX: 0000000000001000 RSI: ffffffffa0b0e000 RDI: ffff888107ee9071 [ 5590.803065] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 [ 5590.803069] R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000019 [ 5590.803073] R13: 0000000000174fff R14: 0000000000001000 R15: ffff888107ee9000 [ 5590.803077] FS: 00007f62a99bee80(0000) GS:ffff88849f880000(0000) knlGS:0000000000000000 [ 5590.803082] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5590.803085] CR2: ffffffffa0b0e000 CR3: 000000010a1a8004 CR4: 0000000000770ee0 [ 5590.803089] PKRU: 55555554 [ 5590.803091] Call Trace: [ 5590.803093] [ 5590.803096] error_state_read+0xa1/0xd0 [i915] [ 5590.803175] kernfs_fop_read_iter+0xb2/0x1b0 [ 5590.803180] new_sync_read+0x116/0x1a0 [ 5590.803185] vfs_read+0x114/0x1b0 [ 5590.803189] ksys_read+0x63/0xe0 [ 5590.803193] do_syscall_64+0x38/0xc0 [ 5590.803197] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 5590.803201] RIP: 0033:0x7f62aaea5912 [ 5590.803204] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 5a b9 0c 00 e8 05 19 02 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 [ 5590.803213] RSP: 002b:00007fff5b659ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 5590.803218] RAX: ffffffffffffffda RBX: 0000000000100000 RCX: 00007f62aaea5912 [ 5590.803221] RDX: 000000000008b000 RSI: 00007f62a8c4000f RDI: 0000000000000006 [ 5590.803225] RBP: 00007f62a8bcb00f R08: 0000000000200010 R09: 0000000000101000 [ 5590.803229] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000006 [ 5590.803233] R13: 0000000000075000 R14: 00007f62a8acb010 R15: 0000000000200000 [ 5590.803238] [ 5590.803240] Modules linked in: i915 ttm drm_buddy drm_dp_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops prime_numbers nfnetlink br_netfilter overlay mei_pxp mei_hdcp x86_pkg_temp_thermal coretemp kvm_intel snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core snd_pcm mei_me mei fuse ip_tables x_tables crct10dif_pclmul e1000e crc32_pclmul ptp i2c_i801 ghash_clmulni_intel i2c_smbus pps_core [last unloa ded: ttm] [ 5590.803277] CR2: ffffffffa0b0e000 [ 5590.803280] ---[ end trace 0000000000000000 ]--- (cherry picked from commit 3304033a1e69cd81a2044b4422f0d7e593afb4e6) The Linux kernel CVE team has assigned CVE-2022-49723 to this issue. Affected and fixed versions =========================== Issue introduced in 5.0 with commit 0e39037b3165567660b0e03f67534da5269a0465 and fixed in 5.10.124 with commit 63b26fe0252f923e6aca373e3ad4b31202dcd331 Issue introduced in 5.0 with commit 0e39037b3165567660b0e03f67534da5269a0465 and fixed in 5.15.49 with commit f4c5eba87675a07a6c28cdaca7366aeb4258ec78 Issue introduced in 5.0 with commit 0e39037b3165567660b0e03f67534da5269a0465 and fixed in 5.18.6 with commit 606e5d565605e26bf61a0933a6d56940f339c080 Issue introduced in 5.0 with commit 0e39037b3165567660b0e03f67534da5269a0465 and fixed in 5.19 with commit c9b576d0c7bf55aeae1a736da7974fa202c4394d 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-2022-49723 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/i915/i915_sysfs.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/63b26fe0252f923e6aca373e3ad4b31202dcd331 https://git.kernel.org/stable/c/f4c5eba87675a07a6c28cdaca7366aeb4258ec78 https://git.kernel.org/stable/c/606e5d565605e26bf61a0933a6d56940f339c080 https://git.kernel.org/stable/c/c9b576d0c7bf55aeae1a736da7974fa202c4394d