avfilter/af_acrossover: Check sscanf() return value

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

avfilter/af_acrossover: Check sscanf() return value
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
403bee30 · Limin Wang · Paul B Mahol · 24db9372 · 403bee30
Commit 403bee30 authored Mar 29, 2020 by Limin Wang Committed by Paul B Mahol Apr 17, 2020
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af_acrossover.c libavfilter/af_acrossover.c +4 -1

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--- a/libavfilter/af_acrossover.c
+++ b/libavfilter/af_acrossover.c
@@ -99,7 +99,10 @@ static av_cold int init(AVFilterContext *ctx)
        p = NULL;
-        av_sscanf(arg, "%f", &freq);
+        if (av_sscanf(arg, "%f", &freq) != 1) {
+            av_log(ctx, AV_LOG_ERROR, "Invalid syntax for frequency[%d].\n", i);
+            return AVERROR(EINVAL);
+        }
        if (freq <= 0) {
            av_log(ctx, AV_LOG_ERROR, "Frequency %f must be positive number.\n", freq);
            return AVERROR(EINVAL);