From: Andreas Schwab <schwab@redhat.com>
To: libc-hacker@sourceware.org
Subject: [PATCH] Don't free non-malloced memory and fix memory leak
Date: Tue, 31 May 2011 11:35:00 -0000 [thread overview]
Message-ID: <m34o4bhzmy.fsf@redhat.com> (raw)
2011-05-31 Andreas Schwab <schwab@redhat.com>
* nscd/nscd_getserv_r.c (nscd_getserv_r): Don't free non-malloced
memory. Use alloca_account. Fix memory leak when retrying.
---
nscd/nscd_getserv_r.c | 16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/nscd/nscd_getserv_r.c b/nscd/nscd_getserv_r.c
index de96a57..f9ef056 100644
--- a/nscd/nscd_getserv_r.c
+++ b/nscd/nscd_getserv_r.c
@@ -124,6 +124,7 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
s_name = (char *) (&found->data[0].servdata + 1);
serv_resp = found->data[0].servdata;
s_proto = s_name + serv_resp.s_name_len;
+ alloca_aliases_len = 1;
aliases_len = (uint32_t *) (s_proto + serv_resp.s_proto_len);
aliases_list = ((char *) aliases_len
+ serv_resp.s_aliases_cnt * sizeof (uint32_t));
@@ -154,7 +155,9 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
+ (serv_resp.s_aliases_cnt
* sizeof (uint32_t)));
if (alloca_aliases_len)
- tmp = __alloca (serv_resp.s_aliases_cnt * sizeof (uint32_t));
+ tmp = alloca_account (serv_resp.s_aliases_cnt
+ * sizeof (uint32_t),
+ alloca_used);
else
{
tmp = malloc (serv_resp.s_aliases_cnt * sizeof (uint32_t));
@@ -249,8 +252,9 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
+ (serv_resp.s_aliases_cnt
* sizeof (uint32_t)));
if (alloca_aliases_len)
- aliases_len = alloca (serv_resp.s_aliases_cnt
- * sizeof (uint32_t));
+ aliases_len = alloca_account (serv_resp.s_aliases_cnt
+ * sizeof (uint32_t),
+ alloca_used);
else
{
aliases_len = malloc (serv_resp.s_aliases_cnt
@@ -368,7 +372,11 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
}
if (retval != -1)
- goto retry;
+ {
+ if (!alloca_aliases_len)
+ free (aliases_len);
+ goto retry;
+ }
}
if (!alloca_aliases_len)
--
1.7.4.4
--
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E
"And now for something completely different."
reply other threads:[~2011-05-31 11:35 UTC|newest]
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