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[FFmpeg-devel,2/4] avformat/genh: Check sample rate

Message ID 20220411212120.15692-2-michael@niedermayer.cc
State Accepted
Commit a3d790f1977ed6c326eb93bb61757297a7905dcc
Headers show
Series [FFmpeg-devel,1/4] avformat/demux: Use unsigned to check duration vs duration_text | expand

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yinshiyou/make_loongarch64 success Make finished
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andriy/make_x86 success Make finished
andriy/make_fate_x86 success Make fate finished

Commit Message

Michael Niedermayer April 11, 2022, 9:21 p.m. UTC 
Fixes: signed integer overflow: -2515507630940093440 * 4 cannot be represented in type 'long'
Fixes: 46318/clusterfuzz-testcase-minimized-ffmpeg_dem_GENH_fuzzer-5009637474172928

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/genh.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/libavformat/genh.c b/libavformat/genh.c
index b1c20718f6..a25d4d625a 100644
--- a/libavformat/genh.c
+++ b/libavformat/genh.c
@@ -67,6 +67,9 @@  static int genh_read_header(AVFormatContext *s)
         return AVERROR_INVALIDDATA;
     st->codecpar->block_align = align * st->codecpar->ch_layout.nb_channels;
     st->codecpar->sample_rate = avio_rl32(s->pb);
+    if (st->codecpar->sample_rate < 0)
+        return AVERROR_INVALIDDATA;
+
     avio_skip(s->pb, 4);
     st->duration = avio_rl32(s->pb);