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 2f86e7b1 parent ffd39f91 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	return ret;	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	snprintf(tmp_args, sizeof(tmp_args), "%s:%s",	125	snprintf(tmp_args, sizeof(tmp_args), "%s:%s",
126	args, ctx->scale_sws_opts);	126	args, ctx->scale_sws_opts);
127	args = tmp_args;	127	args = tmp_args;

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