ffmpeg | branch: release/7.1 | Michael Niedermayer <mich...@niedermayer.cc> | Fri Feb 7 01:24:37 2025 +0100| [6acfaa1084fb71e1e1014dfc3cd8f98ca88b304a] | committer: Michael Niedermayer
avformat/wavdec: Fix overflow of intermediate in block_align check Fixes: signed integer overflow: -251517880 * 32 cannot be represented in type 'int' Fixes: 385224934/clusterfuzz-testcase-minimized-ffmpeg_dem_W64_fuzzer-4909298151915520 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 1afbc40875069312dd729b5959fb04950c3938db) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6acfaa1084fb71e1e1014dfc3cd8f98ca88b304a --- libavformat/wavdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c index 78e37b88d7..ae6ff0e022 100644 --- a/libavformat/wavdec.c +++ b/libavformat/wavdec.c @@ -912,10 +912,10 @@ static int w64_read_header(AVFormatContext *s) if (st->codecpar->block_align && st->codecpar->ch_layout.nb_channels < FF_SANE_NB_CHANNELS && st->codecpar->bits_per_coded_sample < 128) { - int block_align = st->codecpar->block_align; + int64_t block_align = st->codecpar->block_align; block_align = FFMAX(block_align, - ((st->codecpar->bits_per_coded_sample + 7) / 8) * + ((st->codecpar->bits_per_coded_sample + 7LL) / 8) * st->codecpar->ch_layout.nb_channels); if (block_align > st->codecpar->block_align) { av_log(s, AV_LOG_WARNING, "invalid block_align: %d, broken file.\n", _______________________________________________ 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".
