| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49723: drm/i915/reset: Fix error_state_read ptr + offset use |
| |
| 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 <f3> 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] <TASK> |
| [ 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] </TASK> |
| [ 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 |
