ffmpeg | branch: release/4.3 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Jun 16 01:59:23 2024 +0200| [8b56b03028e0b85267e35f3795a48ec49f24ae60] | committer: Michael Niedermayer
swscale/output: Avoid undefined overflow in yuv2rgb_write_full() Fixes: signed integer overflow: -140140 * 16525 cannot be represented in type 'int' Fixes: 68859/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-4516387130245120 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit c221c7422f07f2245db5c4cdc958b42ca25eb2b7) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8b56b03028e0b85267e35f3795a48ec49f24ae60 --- libswscale/output.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libswscale/output.c b/libswscale/output.c index 23456ffe97..d53fb8c828 100644 --- a/libswscale/output.c +++ b/libswscale/output.c @@ -1850,9 +1850,9 @@ static av_always_inline void yuv2rgb_write_full(SwsContext *c, Y -= c->yuv2rgb_y_offset; Y *= c->yuv2rgb_y_coeff; Y += 1 << 21; - R = (unsigned)Y + V*c->yuv2rgb_v2r_coeff; - G = (unsigned)Y + V*c->yuv2rgb_v2g_coeff + U*c->yuv2rgb_u2g_coeff; - B = (unsigned)Y + U*c->yuv2rgb_u2b_coeff; + R = (unsigned)Y + V*(unsigned)c->yuv2rgb_v2r_coeff; + G = (unsigned)Y + V*(unsigned)c->yuv2rgb_v2g_coeff + U*(unsigned)c->yuv2rgb_u2g_coeff; + B = (unsigned)Y + U*(unsigned)c->yuv2rgb_u2b_coeff; if ((R | G | B) & 0xC0000000) { R = av_clip_uintp2(R, 30); G = av_clip_uintp2(G, 30); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
