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

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

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 3258cc6507)
This commit is contained in:
James Almer 2018-07-28 00:51:57 -03:00
parent 8df2c7dde6
commit bc2301429e

View File

@ -62,6 +62,9 @@ const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
{
int i;
if (!name)
return NULL;
for (i = 0; bitstream_filters[i]; i++) {
const AVBitStreamFilter *f = bitstream_filters[i];
if (!strcmp(f->name, name))