From a9c1ef2626363fbc0987cc34e615e07052b9ba5a Mon Sep 17 00:00:00 2001 From: James Almer Date: Sat, 28 Jul 2018 00:51:57 -0300 Subject: [PATCH] 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 (cherry picked from commit 3258cc6507a2012d54889ce5f8efbde7e81d927d) --- libavcodec/bitstream_filters.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c index 840bb43e4d..462cacf02c 100644 --- a/libavcodec/bitstream_filters.c +++ b/libavcodec/bitstream_filters.c @@ -58,6 +58,9 @@ 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))