vf_format: check input validity

CC: libav-stable@libav.org

vf_format: check input validity
CC: libav-stable@libav.org
d1afd3e1 · Vittorio Giovara · 7b48bf95 · d1afd3e1
Commit d1afd3e1 authored Oct 18, 2014 by Vittorio Giovara
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vf_format.c libavfilter/vf_format.c +5 -0

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--- a/libavfilter/vf_format.c
+++ b/libavfilter/vf_format.c
@@ -59,6 +59,11 @@ static av_cold int init(AVFilterContext *ctx)
    int nb_formats = 1;
    int i;

+    if (!s->pix_fmts) {
+        av_log(ctx, AV_LOG_ERROR, "Empty output format string.\n");
+        return AVERROR(EINVAL);
+    }
+
    /* count the formats */
    cur = s->pix_fmts;
    while ((cur = strchr(cur, '|'))) {