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From 77a34079d8f3d63b61543bf3af93043f8674e4c4 Mon Sep 17 00:00:00 2001
From: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Tue, 3 Aug 2021 21:11:03 +0530
Subject: [PATCH] gaiconf_init: Avoid double-free in label and precedence lists
labellist and precedencelist could get freed a second time if there
are allocation failures, so set them to NULL to avoid a double-free.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
---
sysdeps/posix/getaddrinfo.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 838a68f..43dfc67 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -2008,6 +2008,7 @@ gaiconf_init (void)
l = l->next;
}
free_prefixlist (labellist);
+ labellist = NULL;
/* Sort the entries so that the most specific ones are at
the beginning. */
@@ -2046,6 +2047,7 @@ gaiconf_init (void)
l = l->next;
}
free_prefixlist (precedencelist);
+ precedencelist = NULL;
/* Sort the entries so that the most specific ones are at
the beginning. */
--
1.8.3.1
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