ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | Sat Sep 10 23:54:17 2022 +0200| [446de009f922014d77b801bb0a44ba6e3cc3aac4] | committer: Michael Niedermayer
avcodec/exr: Check preview psize Fixes: signed integer overflow: 17121181824 * 538976288 cannot be represented in type 'long long' Fixes: 48798/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5915330316206080 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 ac26712e35f5ebc726d1be14bb4a420949e66604) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=446de009f922014d77b801bb0a44ba6e3cc3aac4 --- libavcodec/exr.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 642a86ae6d..e3effad2e7 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1947,9 +1947,12 @@ static int decode_header(EXRContext *s, AVFrame *frame) "preview", 16)) >= 0) { uint32_t pw = bytestream2_get_le32(gb); uint32_t ph = bytestream2_get_le32(gb); - int64_t psize = 4LL * pw * ph; + uint64_t psize = pw * ph; + if (psize > INT64_MAX / 4) + return AVERROR_INVALIDDATA; + psize *= 4; - if (psize >= bytestream2_get_bytes_left(gb)) + if ((int64_t)psize >= bytestream2_get_bytes_left(gb)) return AVERROR_INVALIDDATA; bytestream2_skip(gb, psize); _______________________________________________ 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".
