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linux/drivers/gpu
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Srinivasan Shanmugam 68f75e6f08 drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe 
[ Upstream commit 8e4ed3cf16 ]

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)

Cc: Tom Chung <chiahsuan.chung@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Roman Li <roman.li@amd.com>
Cc: Alex Hung <alex.hung@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[Xiangyu: BP to fix CVE: CVE-2024-49914, modified the file path from
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn20/dcn20_hwseq.c to
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_hwseq.c
and minor conflict resolution]
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-09 10:31:42 +01:00
..
drm drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe 2024-12-09 10:31:42 +01:00
host1x gpu: host1x: Do not setup DMA for virtual devices 2024-05-17 12:02:15 +02:00
ipu-v3 drm for 6.6-rc1 2023-08-30 13:34:34 -07:00
trace gpu/trace: add a gpu total memory usage tracepoint 2020-03-03 17:52:41 -05:00
vga PCI/VGA: Move vgaarb to drivers/pci 2022-03-09 18:30:46 -06:00
Makefile gpu: host1x: Add context bus 2022-06-01 11:50:42 +02:00