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ffmpeg: Check read_ffserver_streams() return value 

The function avformat_alloc_context() will return a NULL pointer on
failure. However, in function read_ffserver_streams(), its return value
is not validated and the subsequent dereference may result in a bad
memory access bug. Check its return value against NULL and avoid
potential NULL dereference.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Pan Bian 2017-11-27 09:12:54 +08:00 committed by Michael Niedermayer
parent 5b4baf1506
commit 2ba6d7cb82
1 changed files with 2 additions and 0 deletions
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2
fftools/ffmpeg_opt.c
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@ -2000,6 +2000,8 @@ static int read_ffserver_streams(OptionsContext *o, AVFormatContext *s, const ch
{ {
int i, err; int i, err;
AVFormatContext *ic = avformat_alloc_context(); AVFormatContext *ic = avformat_alloc_context();
if (!ic)
return AVERROR(ENOMEM);
ic->interrupt_callback = int_cb; ic->interrupt_callback = int_cb;
err = avformat_open_input(&ic, filename, NULL, NULL); err = avformat_open_input(&ic, filename, NULL, NULL);