From: Josip Pavic <[email protected]> [Why] Failing to allocate a transfer function during stream construction leads to a null pointer dereference
[How] Handle the failed allocation by failing the stream construction Cc: [email protected] Signed-off-by: Josip Pavic <[email protected]> Reviewed-by: Aric Cyr <[email protected]> Acked-by: Rodrigo Siqueira <[email protected]> --- .../gpu/drm/amd/display/dc/core/dc_stream.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c index 3b897372ed27..d6989d115c5c 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c @@ -56,7 +56,7 @@ void update_stream_signal(struct dc_stream_state *stream, struct dc_sink *sink) } } -static void dc_stream_construct(struct dc_stream_state *stream, +static bool dc_stream_construct(struct dc_stream_state *stream, struct dc_sink *dc_sink_data) { uint32_t i = 0; @@ -118,11 +118,17 @@ static void dc_stream_construct(struct dc_stream_state *stream, update_stream_signal(stream, dc_sink_data); stream->out_transfer_func = dc_create_transfer_func(); + if (stream->out_transfer_func == NULL) { + dc_sink_release(dc_sink_data); + return false; + } stream->out_transfer_func->type = TF_TYPE_BYPASS; stream->out_transfer_func->ctx = stream->ctx; stream->stream_id = stream->ctx->dc_stream_id_count; stream->ctx->dc_stream_id_count++; + + return true; } static void dc_stream_destruct(struct dc_stream_state *stream) @@ -164,13 +170,20 @@ struct dc_stream_state *dc_create_stream_for_sink( stream = kzalloc(sizeof(struct dc_stream_state), GFP_KERNEL); if (stream == NULL) - return NULL; + goto alloc_fail; - dc_stream_construct(stream, sink); + if (dc_stream_construct(stream, sink) == false) + goto construct_fail; kref_init(&stream->refcount); return stream; + +construct_fail: + kfree(stream); + +alloc_fail: + return NULL; } struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream) -- 2.27.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
