diff options
| author | Hersen Wu <hersenxs.wu@amd.com> | 2024-04-23 17:57:37 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-04-27 00:22:44 +0300 |
| commit | f1fd8a0a54e6d23a6d16ee29159f247862460fd1 (patch) | |
| tree | 0d206f2dc12cbab3e10c26d49016887e59902ef9 /drivers/gpu | |
| parent | 1357b2165d9ad94faa4c4a20d5e2ce29c2ff29c3 (diff) | |
| download | linux-f1fd8a0a54e6d23a6d16ee29159f247862460fd1.tar.xz | |
drm/amd/display: Fix overlapping copy within dml_core_mode_programming
[WHY]
&mode_lib->mp.Watermark and &locals->Watermark are
the same address. memcpy may lead to unexpected behavior.
[HOW]
memmove should be used.
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c index 6255101737b5..3e919f5c00ca 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c @@ -9460,8 +9460,10 @@ void dml_core_mode_programming(struct display_mode_lib_st *mode_lib, const struc /* Copy the calculated watermarks to mp.Watermark as the getter functions are * implemented by the DML team to copy the calculated values from the mp.Watermark interface. + * &mode_lib->mp.Watermark and &locals->Watermark are the same address, memcpy may lead to + * unexpected behavior. memmove should be used. */ - memcpy(&mode_lib->mp.Watermark, CalculateWatermarks_params->Watermark, sizeof(struct Watermarks)); + memmove(&mode_lib->mp.Watermark, CalculateWatermarks_params->Watermark, sizeof(struct Watermarks)); for (k = 0; k < mode_lib->ms.num_active_planes; ++k) { if (mode_lib->ms.cache_display_cfg.writeback.WritebackEnable[k] == true) { |