From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avcodec/vp9_superframe_split_bsf: Check in size
Date: Fri, 18 Mar 2022 18:46:21 +0100
Message-ID: <20220318174621.26974-1-michael@niedermayer.cc> (raw)
Fixes: Out of array read
Fixes: 45137/clusterfuzz-testcase-minimized-ffmpeg_BSF_VP9_SUPERFRAME_SPLIT_fuzzer-4984270639202304
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/vp9_superframe_split_bsf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/vp9_superframe_split_bsf.c b/libavcodec/vp9_superframe_split_bsf.c
index ed0444561a..481484a4f0 100644
--- a/libavcodec/vp9_superframe_split_bsf.c
+++ b/libavcodec/vp9_superframe_split_bsf.c
@@ -51,7 +51,7 @@ static int vp9_superframe_split_filter(AVBSFContext *ctx, AVPacket *out)
return ret;
in = s->buffer_pkt;
- marker = in->data[in->size - 1];
+ marker = in->size ? in->data[in->size - 1] : 0;
if ((marker & 0xe0) == 0xc0) {
int length_size = 1 + ((marker >> 3) & 0x3);
int nb_frames = 1 + (marker & 0x7);
--
2.17.1
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next reply other threads:[~2022-03-18 17:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-18 17:46 Michael Niedermayer [this message]
2022-03-18 17:56 ` Andreas Rheinhardt
2022-03-19 17:38 ` Michael Niedermayer
2022-03-21 18:54 ` Michael Niedermayer
2022-03-21 20:59 ` Andreas Rheinhardt
2022-03-21 21:12 ` Michael Niedermayer
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