Otherwise p->linesize[0] * y will be evaluated as an unsigned which leads to segfaults in case linesize is negative. This happens in the apng-dispose-previous FATE-test in case one makes get_buffer return pictures with negative linesizes.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> --- libavcodec/pngdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 582953d17b..3c3eca601e 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -1387,7 +1387,7 @@ exit_loop: if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { size_t byte_depth = s->bit_depth > 8 ? 2 : 1; size_t raw_bpp = s->bpp - byte_depth; - unsigned x, y; + ptrdiff_t x, y; av_assert0(s->bit_depth > 1); -- 2.34.1 _______________________________________________ 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".