CVE-2024-49914: drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe
This commit addresses a null pointer dereference issue in the
`dcn20_program_pipe` function. The issue could occur when
`pipe_ctx->plane_state` is null.
The fix adds a check to ensure `pipe_ctx->plane_state` is not null
before accessing. This prevents a null pointer dereference.
Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn20/dcn20_hwseq.c:1925 dcn20_program_pipe() error: we previously assumed 'pipe_ctx->plane_state' could be null (see line 1877)
Classification
CVE ID: CVE-2024-49914
CVSS Base Severity: LOW
CVSS Base Score: 0.0
Affected Products
Vendor: Linux
Product: Linux
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 5.06% (scored less or equal to compared to others)
EPSS Date: 2025-02-03 (when was this score calculated)
References
https://git.kernel.org/stable/c/68f75e6f08aad66069a629db8d7840919156c761https://git.kernel.org/stable/c/65a6fee22d5cfa645cb05489892dc9cd3d142fc2
https://git.kernel.org/stable/c/8e4ed3cf1642df0c4456443d865cff61a9598aa8