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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-36969

drm/amd/display: Fix division by zero in setup_dsc_config

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix division by zero in setup_dsc_config When slice_height is 0, the division by slice_height in the calculation of the number of slices will cause a division by zero driver crash. This leaves the kernel in a state that requires a reboot. This patch adds a check to avoid the division by zero. The stack trace below is for the 6.8.4 Kernel. I reproduced the issue on a Z16 Gen 2 Lenovo Thinkpad with a Apple Studio Display monitor connected via Thunderbolt. The amdgpu driver crashed with this exception when I rebooted the system with the monitor connected. kernel: ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) kernel: ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? exc_divide_error (arch/x86/kernel/traps.c:194 (discriminator 2)) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: ? asm_exc_divide_error (./arch/x86/include/asm/idtentry.h:548) kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu kernel: dc_dsc_compute_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1109) amdgpu After applying this patch, the driver no longer crashes when the monitor is connected and the system is rebooted. I believe this is the same issue reported for 3113.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < a32c8f951c8a456c1c251e1dcdf21787f8066445affected
  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 91402e0e5de9124a3108db7a14163fcf9a6d322faffected
  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 7e4f50dfc98c49b3dc6875a35c3112522fb25639affected
  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < f187fcbbb8f8bf10c6687f0beae22509369f7563affected
  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 308de6be0c9c7ba36915c0d398e771725c0ea911affected
  • 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 130afc8a886183a94cf6eab7d24f300014ff87baaffected

Linux Linux

Default version status: affected

  • 4.15affected
  • 0 to < 4.15unaffected
  • 5.15.160 to ≤ 5.15.*unaffected
  • 6.1.92 to ≤ 6.1.*unaffected
  • 6.6.32 to ≤ 6.6.*unaffected
  • 6.8.11 to ≤ 6.8.*unaffected
  • 6.9.2 to ≤ 6.9.*unaffected
  • 6.10 to ≤ *unaffected

References