graphparser: add a NULL check on the argument passed to strstr

Fix crash in create_filter() which occurrs if a scale filter with no args is provided.

Stefano Sabatini committed 15 years ago

Commit f80b3811 parent c61bfc11 file · +1 −1Browse files

Showing the changes to libavfilter/graphparser.c (1 of 1 file). Show all

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@@ -121,7 +121,7 @@ static int create_filter(AVFilterContext *filt_ctx, AVFilterGraph ctx, int ind · 120 unmodified lines
121	121	return ret;
122	122	}
123	123
124		− if (!strcmp(filt_name, "scale") && !strstr(args, "flags")) {
	124	+ if (!strcmp(filt_name, "scale") && args && !strstr(args, "flags")) {
125	125	snprintf(tmp_args, sizeof(tmp_args), "%s:%s",
126	126	args, ctx->scale_sws_opts);
127	127	args = tmp_args;

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