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Fail the sbuf if vsnprintf(3) fails.

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This commit is contained in:
Poul-Henning Kamp 2015-10-02 09:23:14 +00:00
parent 0bc8063012
commit d58b610faa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=288484
1 changed files with 4 additions and 0 deletions
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4
sys/kern/subr_sbuf.c
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@ -623,6 +623,10 @@ sbuf_vprintf(struct sbuf *s, const char *fmt, va_list ap)
va_copy(ap_copy, ap);
len = vsnprintf(&s->s_buf[s->s_len], SBUF_FREESPACE(s) + 1,
fmt, ap_copy);
if (len < 0) {
s->s_error = errno;
return (-1);
}
va_end(ap_copy);
if (SBUF_FREESPACE(s) >= len)