From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avformat/mxfdec: Check edit unit for overflow in mxf_set_current_edit_unit()
Date: Wed, 5 Feb 2025 12:56:35 +0100
Message-ID: <20250205115635.2981829-1-michael@niedermayer.cc> (raw)
Fixes: signed integer overflow: 9223372036854775807 + 1 cannot be represented in type 'long'
Fixes: 392672068/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-6232335892152320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/mxfdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 6bc8980d9c1..3b87063c3f2 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -3956,7 +3956,7 @@ static int64_t mxf_set_current_edit_unit(MXFContext *mxf, AVStream *st, int64_t
int64_t new_edit_unit;
MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
- if (!t || track->wrapping == UnknownWrapped)
+ if (!t || track->wrapping == UnknownWrapped || edit_unit > INT64_MAX - track->edit_units_per_packet)
return -1;
if (mxf_edit_unit_absolute_offset(mxf, t, edit_unit + track->edit_units_per_packet, track->edit_rate, NULL, &next_ofs, NULL, 0) < 0 &&
--
2.48.1
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next reply other threads:[~2025-02-05 11:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-05 11:56 Michael Niedermayer [this message]
2025-02-05 14:53 ` Tomas Härdin
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