From: Alex Hung alex.hung@amd.com

stable inclusion from stable-v5.10.227 commit f4149eec960110ffd5bcb161075dd9f1d7773075 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAZM9Wi CVE: CVE-2024-50049

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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[ Upstream commit ff599ef6970ee000fa5bc38d02fa5ff5f3fc7575 ]

[WHAT & HOW] se is null checked previously in the same function, indicating it might be null; therefore, it must be checked when used again.

This fixes 1 FORWARD_NULL issue reported by Coverity.

Acked-by: Alex Hung alex.hung@amd.com Reviewed-by: Rodrigo Siqueira rodrigo.siqueira@amd.com Signed-off-by: Alex Hung alex.hung@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Xiaomeng Zhang zhangxiaomeng13@huawei.com --- drivers/gpu/drm/amd/display/dc/core/dc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index ddbfce8390bb..3c350c76790a 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1251,7 +1251,7 @@ bool dc_validate_seamless_boot_timing(const struct dc *dc, if (crtc_timing->pix_clk_100hz != pix_clk_100hz) return false;

- if (!se->funcs->dp_get_pixel_format) + if (!se || !se->funcs->dp_get_pixel_format) return false;

if (!se->funcs->dp_get_pixel_format(