Commit-ID: b2aff96327545aa5ceb25e3116be69c8b06de703
Gitweb: http://git.kernel.org/tip/b2aff96327545aa5ceb25e3116be69c8b06de703
Author: Julia Lawall <julia@xxxxxxx>
AuthorDate: Tue, 24 Aug 2010 04:39:49 +0000
Committer: David S. Miller <davem@xxxxxxxxxxxxx>
CommitDate: Wed, 25 Aug 2010 16:36:50 -0700
net/netfilter/ipvs: Eliminate memory leak
__ip_vs_service_get and __ip_vs_svc_fwm_get increment a reference count, so
that reference count should be decremented before leaving the function in an
error case.
A simplified version of the semantic match that finds this problem is:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
local idexpression x;
expression E;
identifier f1;
iterator I;
@@
x = __ip_vs_service_get(...);
<... when != x
when != true (x == NULL || ...)
when != if (...) { <+...x...+> }
when != I (...) { <+...x...+> }
(
x == NULL
|
x == E
|
x->f1
)
...>
* return ...;
// </smpl>
Signed-off-by: Julia Lawall <julia@xxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
net/netfilter/ipvs/ip_vs_ctl.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 0f0c079..53a88af 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2155,7 +2155,7 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
if (cmd != IP_VS_SO_SET_ADD
&& (svc == NULL || svc->protocol != usvc.protocol)) {
ret = -ESRCH;
- goto out_unlock;
+ goto out_drop_service;
}
switch (cmd) {
@@ -2189,6 +2189,7 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
ret = -EINVAL;
}
+out_drop_service:
if (svc)
ip_vs_service_put(svc);
--
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