Commit 19045efd authored by Michael Niedermayer's avatar Michael Niedermayer

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/ffmpegReviewed-by: 's avatarPaul B Mahol <onemda@gmail.com>
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 38065960)
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent 33e67eb8
......@@ -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;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment