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Patch "netfilter: nfnl_cthelper: Fix memory leak" has been added to the 3.18-stable tree

PATCH [email protected] 1 participant 1 message Dec 21, 2017

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This is a note to let you know that I've just added the patch titled

netfilter: nfnl_cthelper: Fix memory leak

to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
netfilter-nfnl_cthelper-fix-memory-leak.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Thu Dec 21 10:55:04 CET 2017

From: Jeffy Chen <[email protected]>
Date: Tue, 21 Mar 2017 15:07:10 +0800
Subject: netfilter: nfnl_cthelper: Fix memory leak

From: Jeffy Chen <[email protected]>

[ Upstream commit f83bf8da1135ca635aac8f062cad3f001fcf3a26 ]

We have memory leaks of nf_conntrack_helper & expect_policy.

Signed-off-by Jeffy Chen <[email protected]>
Signed-off-by Pablo Neira Ayuso <[email protected]>
Signed-off-by Sasha Levin <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 net/netfilter/nfnetlink_cthelper.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
net/netfilter/nfnetlink_cthelper.c +9 -3
@@ -216,7 +216,7 @@ nfnl_cthelper_create(const struct nlattr
 
 	ret = nfnl_cthelper_parse_expect_policy(helper, tb[NFCTH_POLICY]);
 	if (ret < 0)
-		goto err;
+		goto err1;
 
 	strncpy(helper->name, nla_data(tb[NFCTH_NAME]), NF_CT_HELPER_NAME_LEN);
 	helper->data_len = ntohl(nla_get_be32(tb[NFCTH_PRIV_DATA_LEN]));

@@ -247,10 +247,12 @@ nfnl_cthelper_create(const struct nlattr
 
 	ret = nf_conntrack_helper_register(helper);
 	if (ret < 0)
-		goto err;
+		goto err2;
 
 	return 0;
-err:
+err2:
+	kfree(helper->expect_policy);
+err1:
 	kfree(helper);
 	return ret;
 }

@@ -696,6 +698,8 @@ nfnl_cthelper_del(struct sock *nfnl, str
 
 			found = true;
 			nf_conntrack_helper_unregister(cur);
+			kfree(cur->expect_policy);
+			kfree(cur);
 		}
 	}
 	/* Make sure we return success if we flush and there is no helpers */

@@ -759,6 +763,8 @@ static void __exit nfnl_cthelper_exit(vo
 				continue;
 
 			nf_conntrack_helper_unregister(cur);
+			kfree(cur->expect_policy);
+			kfree(cur);
 		}
 	}
 }

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/netfilter-nfnl_cthelper-fix-memory-leak.patch