ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sun May 10 12:04:05 2020 +0200| [7a92147f87129851c1cc2c15f4ba714b8cf23f71] | committer: Michael Niedermayer
avcodec/iff: Fix several integer overflows Fixes: negation of -2147483648 cannot be represented in type 'int32_t' (aka 'int'); cast to an unsigned type to negate this value to itself Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int32_t' (aka 'int') Fixes: 20492/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5764066459254784 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7a92147f87129851c1cc2c15f4ba714b8cf23f71 --- libavcodec/iff.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/libavcodec/iff.c b/libavcodec/iff.c index 75be844a95..b39bb2c312 100644 --- a/libavcodec/iff.c +++ b/libavcodec/iff.c @@ -1378,11 +1378,10 @@ static void decode_delta_d(uint8_t *dst, opcode--; } } else { - opcode = -opcode; while (opcode && bytestream2_get_bytes_left(&gb) > 0) { bytestream2_put_be32(&pb, bytestream2_get_be32(&gb)); bytestream2_skip_p(&pb, pitch - 4); - opcode--; + opcode++; } } entries--; _______________________________________________ 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".
