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Protect against malloc failure corrupting errno, which is not 

permitted of these functions.
This commit is contained in:
kre 2020-03-25 16:10:17 +00:00
parent 05b122f3e6
commit 93b9d85a0a
1 changed files with 4 additions and 2 deletions
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6
lib/libc/string/strerror.c
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@ -1,4 +1,4 @@
/* $NetBSD: strerror.c,v 1.17 2015/01/20 18:31:25 christos Exp $ */
/* $NetBSD: strerror.c,v 1.18 2020/03/25 16:10:17 kre Exp $ */
/*
* Copyright (c) 1988 Regents of the University of California.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: strerror.c,v 1.17 2015/01/20 18:31:25 christos Exp $");
__RCSID("$NetBSD: strerror.c,v 1.18 2020/03/25 16:10:17 kre Exp $");
#define __SETLOCALE_SOURCE__
@ -78,7 +78,9 @@ strerror_l(int num, locale_t loc)
thr_once(&strerror_once, strerror_setup);
buf = thr_getspecific(strerror_key);
if (buf == NULL) {
error = errno;
buf = malloc(NL_TEXTMAX);
errno = error;
if (buf == NULL) {
static char fallback_buf[NL_TEXTMAX];
buf = fallback_buf;