Quoting Michael Niedermayer (2022-11-18 22:09:15) > Fixes: out of array access > Fixes: > 52427/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-4849108968144896 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/tiff.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c > index cde318d5e5..b962dce5a2 100644 > --- a/libavcodec/tiff.c > +++ b/libavcodec/tiff.c > @@ -994,7 +994,7 @@ static int dng_decode_tiles(AVCodecContext *avctx, > AVFrame *frame, > tile_count_y = (s->height + s->tile_length - 1) / s->tile_length; > > /* Iterate over the number of tiles */ > - for (tile_idx = 0; tile_idx < s->tile_count; tile_idx++) { > + for (tile_idx = 0; tile_idx < tile_count_x * tile_count_y; tile_idx++) {
Then why store tile_count at all? Seems to be it will just confuse future readers. If I'm reading the code correctly, the only other use of tile_count is in setting has_tile_bits, but that also checks is_tiled, which is set together with tile_count. -- Anton Khirnov _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
