Bigger sizes are misinterpreted as negative numbers by the API Fixes: infinite loop Fixes: 26611/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-4890614975692800
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/iff.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/iff.c b/libavformat/iff.c index 04fe8be4eb..5eee2474ca 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -223,6 +223,9 @@ static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof) uint64_t orig_pos = avio_tell(pb); const char * metadata_tag = NULL; + if (size >= INT64_MAX) + return AVERROR_INVALIDDATA; + switch(tag) { case MKTAG('D','I','A','R'): metadata_tag = "artist"; break; case MKTAG('D','I','T','I'): metadata_tag = "title"; break; -- 2.17.1 _______________________________________________ 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".
