ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Aug 1 18:38:31 2021 +0200| [fbf576417aa7701fad87d27c998ab0fe2ec6ba84] | committer: Michael Niedermayer
avcodec/exr: Check ac_count Fixes: signed integer overflow: -9223372036854775808 * 2 cannot be represented in type 'long long' Fixes: 36244/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-6090656186499072 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 9bc32d7c4bed836086199ce55cf4a5ddd5217f3e) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fbf576417aa7701fad87d27c998ab0fe2ec6ba84 --- libavcodec/exr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 27c243c12c..21b3b179ab 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1014,7 +1014,9 @@ static int dwa_uncompress(EXRContext *s, const uint8_t *src, int compressed_size dc_count = AV_RL64(src + 72); ac_compression = AV_RL64(src + 80); - if (compressed_size < (uint64_t)(lo_size | ac_size | dc_size | rle_csize) || compressed_size < 88LL + lo_size + ac_size + dc_size + rle_csize) + if ( compressed_size < (uint64_t)(lo_size | ac_size | dc_size | rle_csize) || compressed_size < 88LL + lo_size + ac_size + dc_size + rle_csize + || ac_count > (uint64_t)INT_MAX/2 + ) return AVERROR_INVALIDDATA; bytestream2_init(&gb, src + 88, compressed_size - 88); _______________________________________________ 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".
