diff options
| author | Charlene Liu <Charlene.Liu@amd.com> | 2025-11-06 18:10:30 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-11-18 10:51:38 -0500 |
| commit | 8ffa289f90be1a9b5bf693aa61004a9411ffe93a (patch) | |
| tree | c30255e2916a65bfcf8ed5ca6be346e0d6da8639 | |
| parent | 79b3c037f972dcb13e325a8eabfb8da835764e15 (diff) | |
drm/amd/display: Add null pointer check in link_dpms
[why]
Check that the stream exists to add link->local_sink null pointer access
protection.
Reviewed-by: Harold Sun <harold.sun@amd.com>
Reviewed-by: Ethan Cheung <ethan.cheung@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c index 4ddcdc222913..2a70dcdd2e47 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c @@ -2226,7 +2226,11 @@ static enum dc_status enable_link( { enum dc_status status = DC_ERROR_UNEXPECTED; struct dc_stream_state *stream = pipe_ctx->stream; - struct dc_link *link = stream->link; + struct dc_link *link = NULL; + + if (stream == NULL) + return DC_ERROR_UNEXPECTED; + link = stream->link; /* There's some scenarios where driver is unloaded with display * still enabled. When driver is reloaded, it may cause a display |