From b0159af6bc76553b1ab7546d821bb8c16a666cfd Mon Sep 17 00:00:00 2001 From: James Almer Date: Sat, 19 Jul 2025 00:36:51 -0300 Subject: [PATCH] avfilter/f_metadata: use the return value of vsnprintf() to write the argument list Should fix use-of-uninitialized-value under MSAN. Signed-off-by: James Almer --- libavfilter/f_metadata.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavfilter/f_metadata.c b/libavfilter/f_metadata.c index f4e4aa312d..a9036ab475 100644 --- a/libavfilter/f_metadata.c +++ b/libavfilter/f_metadata.c @@ -201,8 +201,8 @@ static void print_file(AVFilterContext *ctx, const char *msg, ...) va_start(argument_list, msg); if (msg) { char buf[128]; - vsnprintf(buf, sizeof(buf), msg, argument_list); - avio_write(s->avio_context, buf, av_strnlen(buf, sizeof(buf))); + int ret = vsnprintf(buf, sizeof(buf), msg, argument_list); + avio_write(s->avio_context, buf, ret); } va_end(argument_list); }