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PUBLISHED

CVE-2024-26729

drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv

Reserved:2024-02-19
Published:2024-04-03
Updated:2024-04-04

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv Fixes potential null pointer dereference warnings in the dc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up() functions. In both functions, the 'dc_dmub_srv' variable was being dereferenced before it was checked for null. This could lead to a null pointer dereference if 'dc_dmub_srv' is null. The fix is to check if 'dc_dmub_srv' is null before dereferencing it. Thus moving the null checks for 'dc_dmub_srv' to the beginning of the functions to ensure that 'dc_dmub_srv' is not null when it is dereferenced. Found by smatch & thus fixing the below: drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check 'dc_dmub_srv' (see line 128) drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check 'dc_dmub_srv' (see line 1164)

Product status

Default status
unaffected

028bac583449 before 351080ba3414
affected

028bac583449 before d2b48f340d9e
affected

Default status
affected

6.7
affected

Any version before 6.7
unaffected

6.7.7
unaffected

6.8
unaffected

References

https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80

https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907

cve.org CVE-2024-26729

nvd.nist.gov CVE-2024-26729

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