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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-10 21:10:16 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-17 15:57:27 +0200 |
| commit | 19045efd0573b1c54d10db04c7f5426a2741bf14 (patch) | |
| tree | 0c0dd6e3fb868f9390ecb0c01c5029500c8bbb29 | |
| parent | 33e67eb80cf2d67198828f9430815ef319ffae6e (diff) | |
| download | ffmpeg-19045efd0573b1c54d10db04c7f5426a2741bf14.tar.gz | |
avcodec/shorten: Move buffer allocation and offset init to end of read_header()
They are time consuming operations, performing them after the other checks
improves the speed with damaged input dramatically.
Fixes: Timeout
Fixes: 2928/clusterfuzz-testcase-4992812120539136
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 380659604f2692b625928a3a76a1c046f473c9f6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/shorten.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index a36a77210e..b56d205932 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -453,12 +453,6 @@ static int read_header(ShortenContext *s) } s->nwrap = FFMAX(NWRAP, maxnlpc); - if ((ret = allocate_buffers(s)) < 0) - return ret; - - if ((ret = init_offset(s)) < 0) - return ret; - if (s->version > 1) s->lpcqoffset = V2LPCQOFFSET; @@ -494,6 +488,13 @@ static int read_header(ShortenContext *s) } end: + + if ((ret = allocate_buffers(s)) < 0) + return ret; + + if ((ret = init_offset(s)) < 0) + return ret; + s->cur_chan = 0; s->bitshift = 0; |