CVE-2024-47683: drm/amd/display: Skip Recompute DSC Params if no Stream on Link
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Skip Recompute DSC Params if no Stream on Link [why] Encounter NULL pointer dereference uner mst + dsc setup. BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 4 PID: 917 Comm: sway Not tainted 6.3.9-arch1-1 #1 124dc55df4f5272ccb409f39ef4872fc2b3376a2 Hardware name: LENOVO 20NKS01Y00/20NKS01Y00, BIOS R12ET61W(1.31 ) 07/28/2022 RIP: 0010:drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper] Code: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 00 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 <48> 8> RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224 RDX: ffff8afb9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280 RBP: ffff8afb83d67000 R08: 0000000000000001 R09: ffff8afb9652f850 R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8afb8d7688a0 R14: ffff8afb8da1a578 R15: 0000000000000224 FS: 00007f4dac35ce00(0000) GS:ffff8afe30b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000010ddc6000 CR4: 00000000003506e0 Call Trace: <TASK> ? __die+0x23/0x70 ? page_fault_oops+0x171/0x4e0 ? plist_add+0xbe/0x100 ? exc_page_fault+0x7c/0x180 ? asm_exc_page_fault+0x26/0x30 ? drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026] ? drm_dp_atomic_find_time_slots+0x28/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026] compute_mst_dsc_configs_for_link+0x2ff/0xa40 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] ? fill_plane_buffer_attributes+0x419/0x510 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] compute_mst_dsc_configs_for_state+0x1e1/0x250 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] amdgpu_dm_atomic_check+0xecd/0x1190 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] drm_atomic_check_only+0x5c5/0xa40 drm_mode_atomic_ioctl+0x76e/0xbc0 [how] dsc recompute should be skipped if no mode change detected on the new request. If detected, keep checking whether the stream is already on current state or not.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.1.105 | |
| Linux Linux kernel | >6.1.105<6.1.113 | |
| Linux Linux kernel | >=6.2<6.6.46 | |
| Linux Linux kernel | >6.6.46<6.6.54 | |
| Linux Linux kernel | >=6.7<6.10.5 | |
| Linux Linux kernel | >6.10.5<6.10.13 | |
| Linux Linux kernel | >=6.11<6.11.2 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/282f0a482ee61d5e863512f3c4fcec90216c20d9
- https://git.kernel.org/stable/c/6f9c39e8169384d2a5ca9bf323a0c1b81b3d0f3a
- https://git.kernel.org/stable/c/70275bb960c71d313254473d38c14e7101cee5ad
- https://git.kernel.org/stable/c/718d83f66fb07b2cab89a1fc984613a00e3db18f
- https://git.kernel.org/stable/c/7c887efda1201110211fed8921a92a713e0b6bcd
- https://git.kernel.org/stable/c/8151a6c13111b465dbabe07c19f572f7cbd16fef
- https://git.kernel.org/stable/c/a53841b074cc196c3caaa37e1f15d6bc90943b97
- https://git.kernel.org/stable/c/d45c64d933586d409d3f1e0ecaca4da494b1d9c6
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47683
- https://nvd.nist.gov/vuln/detail/CVE-2024-47683
- https://launchpad.net/bugs/cve/CVE-2024-47683
- https://security-tracker.debian.org/tracker/CVE-2024-47683
- https://ubuntu.com/security/CVE-2024-47683
- https://git.kernel.org/linus/8151a6c13111b465dbabe07c19f572f7cbd16fef
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