From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 9/9] avformat/jacosubdec: Fix overflow in get_shift()
Date: Sat, 17 Sep 2022 23:15:57 +0200
Message-ID: <20220917211557.11547-9-michael@niedermayer.cc> (raw)
In-Reply-To: <20220917211557.11547-1-michael@niedermayer.cc>
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-6722544461283328
Fixes: signed integer overflow: 48214448 * 60 cannot be represented in type 'int'
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/jacosubdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/jacosubdec.c b/libavformat/jacosubdec.c
index 0ee4820f62a..61b1316dc9b 100644
--- a/libavformat/jacosubdec.c
+++ b/libavformat/jacosubdec.c
@@ -144,7 +144,7 @@ static int get_shift(int timeres, const char *buf)
ret = 0;
switch (n) {
case 4:
- ret = sign * (((int64_t)a*3600 + b*60 + c) * timeres + d);
+ ret = sign * (((int64_t)a*3600 + (int64_t)b*60 + c) * timeres + d);
break;
case 3:
ret = sign * (( (int64_t)a*60 + b) * timeres + c);
--
2.17.1
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next prev parent reply other threads:[~2022-09-17 21:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-17 21:15 [FFmpeg-devel] [PATCH 1/9] avformat/ape: Check frames size Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 2/9] avformat/apm: Use 64bit for bit_rate computation Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 3/9] avformat/asfdec_o: Limit packet offset Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 4/9] avformat/cafdec: Check that nb_frasmes fits within 64bit Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 5/9] avformat/dhav: Use 64bit seek_back Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 6/9] avformat/dxa: avoid bpc overflows Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 7/9] avformat/genh: Check nb_channels for IMA ADPCM Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 8/9] avformat/icodec: Check nb_pal Michael Niedermayer
2022-09-17 23:11 ` Peter Ross
2022-09-17 21:15 ` Michael Niedermayer [this message]
2022-09-23 21:03 ` [FFmpeg-devel] [PATCH 1/9] avformat/ape: Check frames size Michael Niedermayer
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