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[FFmpeg-devel,4/6] avformat/mov: Do not zero memory that is written too or unused

Message ID 20210322205833.14541-4-michael@niedermayer.cc
State Accepted
Commit c1fe1114bc4c2f6da764f0eca792cf03c82c3422
Headers show
Series [FFmpeg-devel,1/6] avcodec/h264_slice: Check input SPS in ff_h264_update_thread_context() | expand

Checks

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andriy/x86_make_fate success Make fate finished
andriy/PPC64_make success Make finished
andriy/PPC64_make_fate success Make fate finished

Commit Message

Michael Niedermayer March 22, 2021, 8:58 p.m. UTC 
Fixes: OOM
Fixes: 31220/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6033383962574848

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mov.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Michael Niedermayer March 31, 2021, 6:47 p.m. UTC | #1 
On Mon, Mar 22, 2021 at 09:58:31PM +0100, Michael Niedermayer wrote:
> Fixes: OOM
> Fixes: 31220/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6033383962574848
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavformat/mov.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

will apply

[...]
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Patch

diff --git a/libavformat/mov.c b/libavformat/mov.c
index b90cec7173..5f8bcfbf22 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3018,7 +3018,7 @@  static int mov_read_sdtp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     av_freep(&sc->sdtp_data);
     sc->sdtp_count = 0;
 
-    sc->sdtp_data = av_mallocz(entries);
+    sc->sdtp_data = av_malloc(entries);
     if (!sc->sdtp_data)
         return AVERROR(ENOMEM);