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avdevice/lavfi: check that pointer is set 

Fixes NULL pointer dereference later.
This commit is contained in:
Paul B Mahol 2023-05-10 12:38:28 +02:00
parent dc1d4a8ece
commit 5ce76506de
1 changed files with 4 additions and 0 deletions
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4
libavdevice/lavfi.c
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@ -174,6 +174,10 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
* create a mapping between them and the streams */
for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
int stream_idx = 0, suffix = 0, use_subcc = 0;
if (!inout->name) {
av_log(avctx, AV_LOG_ERROR, "Missing %d outpad name\n", i);
FAIL(AVERROR(EINVAL));
}
sscanf(inout->name, "out%n%d%n", &suffix, &stream_idx, &suffix);
if (!suffix) {
av_log(avctx, AV_LOG_ERROR,