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avcodec/bitstream_filters: check the input argument of av_bsf_get_by_name() for NULL

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Fixes crashes like "ffmpeg -h bsf" caused by passing NULL to strcmp()

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-07-28 00:51:57 -03:00
parent bed125b710
commit 3258cc6507
1 changed files with 3 additions and 0 deletions
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3
libavcodec/bitstream_filters.c
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@ -78,6 +78,9 @@ const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
const AVBitStreamFilter *f = NULL;
void *i = 0;
if (!name)
return NULL;
while ((f = av_bsf_iterate(&i))) {
if (!strcmp(f->name, name))
return f;