From 0d5e3f5a4034b6c9312b7c621e25aa4303a00b6f Mon Sep 17 00:00:00 2001
From: Marton Balint <cus@passwd.hu>
Date: Mon, 17 Jun 2024 22:30:26 +0200
Subject: [PATCH] avutil/timestamp: avoid possible FPE when 0 is passed to
av_ts_make_time_string2()
Signed-off-by: Marton Balint <cus@passwd.hu>
---
libavutil/timestamp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/timestamp.c b/libavutil/timestamp.c
index 2a3e3012a4..6c231a517d 100644
--- a/libavutil/timestamp.c
+++ b/libavutil/timestamp.c
@@ -24,7 +24,7 @@ char *av_ts_make_time_string2(char *buf, int64_t ts, AVRational tb)
snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
} else {
double val = av_q2d(tb) * ts;
- double log = floor(log10(fabs(val)));
+ double log = (fpclassify(val) == FP_ZERO ? -INFINITY : floor(log10(fabs(val))));
int precision = (isfinite(log) && log < 0) ? -log + 5 : 6;
int last = snprintf(buf, AV_TS_MAX_STRING_SIZE, "%.*f", precision, val);
last = FFMIN(last, AV_TS_MAX_STRING_SIZE - 1) - 1;