In order to apply (drm/amd/display: Fix && vs || typos) in full, we revert it, merge its precedent, and apply it back.
Dan Carpenter (1): drm/amd/display: Fix && vs || typos
Liao Chen (1): Revert "drm/amd/display: Fix && vs || typos"
Srinivasan Shanmugam (1): drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()'
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9DNF6 CVE: CVE-2024-26661
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This reverts commit 9d49a04dd37c7a795a226bb1966e7756cbd5e909.
This patch takes 886571d217d7 ("drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set _backlight_level()'") as a dependency, revert and merge its dependency first.
Fixes: fb5a3d037082 ("drm/amd/display: Add NULL test for 'timing generator' in 'dcn21_set_pip e()'") Fixes: 886571d217d7 ("drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight _level()'") Signed-off-by: Liao Chen liaochen4@huawei.com --- drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c index 56b8a9fc9267..14abe2ce5073 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c @@ -184,7 +184,7 @@ void dcn21_set_pipe(struct pipe_ctx *pipe_ctx) struct dmcu *dmcu = pipe_ctx->stream->ctx->dc->res_pool->dmcu; uint32_t otg_inst;
- if (!abm || !tg || !panel_cntl) + if (!abm && !tg && !panel_cntl) return;
otg_inst = tg->inst;
From: Srinivasan Shanmugam srinivasan.shanmugam@amd.com
mainline inclusion from mainline-v6.8-rc4 commit 886571d217d7cc4e0f96f68b21238e3e25694e74 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9DNF6 CVE: CVE-2024-26661
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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'panel_cntl' structure used to control the display panel could be null, dereferencing it could lead to a null pointer access.
Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn21/dcn21_hwseq.c:269 dcn21_set_backlight_level() error: we previously assumed 'panel_cntl' could be null (see line 250)
Fixes: 474ac4a875ca ("drm/amd/display: Implement some asic specific abm call backs.") Cc: Yongqiang Sun yongqiang.sun@amd.com Cc: Anthony Koo Anthony.Koo@amd.com Cc: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Cc: Aurabindo Pillai aurabindo.pillai@amd.com Signed-off-by: Srinivasan Shanmugam srinivasan.shanmugam@amd.com Reviewed-by: Anthony Koo Anthony.Koo@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com
Conflicts: drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c [lc: adjust context] Signed-off-by: Liao Chen liaochen4@huawei.com --- drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c index 14abe2ce5073..2e9c2ab7676f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c @@ -205,8 +205,14 @@ bool dcn21_set_backlight_level(struct pipe_ctx *pipe_ctx, union dmub_rb_cmd cmd; struct dc_context *dc = pipe_ctx->stream->ctx; struct abm *abm = pipe_ctx->stream_res.abm; - uint32_t otg_inst = pipe_ctx->stream_res.tg->inst; + struct timing_generator *tg = pipe_ctx->stream_res.tg; struct panel_cntl *panel_cntl = pipe_ctx->stream->link->panel_cntl; + uint32_t otg_inst; + + if (!abm && !tg && !panel_cntl) + return false; + + otg_inst = tg->inst;
if (dc->dc->res_pool->dmcu) { dce110_set_backlight_level(pipe_ctx, backlight_pwm_u16_16, frame_ramp);
From: Dan Carpenter dan.carpenter@linaro.org
mainline inclusion from mainline-v6.8-rc5 commit 17ba9cde11c2bfebbd70867b0a2ac4a22e573379 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9DNF6 CVE: CVE-2024-26661
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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These ANDs should be ORs or it will lead to a NULL dereference.
Fixes: fb5a3d037082 ("drm/amd/display: Add NULL test for 'timing generator' in 'dcn21_set_pipe()'") Fixes: 886571d217d7 ("drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()'") Reviewed-by: Anthony Koo anthony.koo@amd.com Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Signed-off-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com
Conflicts: drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c [lc: adjust context] Signed-off-by: Liao Chen liaochen4@huawei.com --- drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c index 2e9c2ab7676f..c766666a3160 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c @@ -184,7 +184,7 @@ void dcn21_set_pipe(struct pipe_ctx *pipe_ctx) struct dmcu *dmcu = pipe_ctx->stream->ctx->dc->res_pool->dmcu; uint32_t otg_inst;
- if (!abm && !tg && !panel_cntl) + if (!abm || !tg || !panel_cntl) return;
otg_inst = tg->inst; @@ -209,7 +209,7 @@ bool dcn21_set_backlight_level(struct pipe_ctx *pipe_ctx, struct panel_cntl *panel_cntl = pipe_ctx->stream->link->panel_cntl; uint32_t otg_inst;
- if (!abm && !tg && !panel_cntl) + if (!abm || !tg || !panel_cntl) return false;
otg_inst = tg->inst;
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