On Tue, Sep 27, 2022 at 03:12:00PM -0400, Hamza Mahfooz wrote: > Address the following error: > drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function ‘dc_stream_remove_writeback’: > drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:55: error: array subscript [0, 0] is outside array bounds of ‘struct dc_writeback_info[1]’ [-Werror=array-bounds] > 527 | stream->writeback_info[j] = stream->writeback_info[i]; > | ~~~~~~~~~~~~~~~~~~~~~~^~~ > In file included from ./drivers/gpu/drm/amd/amdgpu/../display/dc/dc.h:1269, > from ./drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:29, > from ./drivers/gpu/drm/amd/amdgpu/../display/dc/basics/dc_common.h:29, > from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:27: > ./drivers/gpu/drm/amd/amdgpu/../display/dc/dc_stream.h:241:34: note: while referencing ‘writeback_info’ > 241 | struct dc_writeback_info writeback_info[MAX_DWB_PIPES]; > | > > Currently, we aren't checking to see if j remains within > writeback_info[]'s bounds. So, add a check to make sure that we aren't > overflowing the buffer. > > Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx> With gcc 11.3, this patch doesn't fix a problem, it introduces one. Building csky:allmodconfig ... failed -------------- Error log: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_stream_remove_writeback': drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:83: error: array subscript 1 is above array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds] 527 | stream->writeback_info[j] = stream->writeback_info[i]; Building mips:allmodconfig ... failed -------------- Error log: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_stream_remove_writeback': drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:83: error: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds] 527 | stream->writeback_info[j] = stream->writeback_info[i]; Building arm:allmodconfig ... failed -------------- Error log: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_stream_remove_writeback': drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:83: error: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds] 527 | stream->writeback_info[j] = stream->writeback_info[i]; Guenter
