netdev - [PATCH 2/2] netfilter: revert "conntrack: silent a memory leak warning"

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Message-Id: <20191008053507.252202-2-zenczykowski@gmail.com>
Date:   Mon,  7 Oct 2019 22:35:07 -0700
From:   Maciej Żenczykowski <zenczykowski@...il.com>
To:     Maciej Żenczykowski <maze@...gle.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Cong Wang <xiyou.wangcong@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Pablo Neira Ayuso <pablo@...filter.org>
Subject: [PATCH 2/2] netfilter: revert "conntrack: silent a memory leak warning"

From: Maciej Żenczykowski <maze@...gle.com>

This reverts commit 114aa35d06d4920c537b72f9fa935de5dd205260.

By my understanding of kmemleak the reasoning for this patch
is incorrect.  If kmemleak couldn't handle rcu we'd have it
reporting leaks all over the place.  My belief is that this
was instead papering over a real leak.

Cc: Cong Wang <xiyou.wangcong@...il.com>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Maciej Żenczykowski <maze@...gle.com>
---
 net/netfilter/nf_conntrack_extend.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index d4ed1e197921..fb208877338a 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -68,7 +68,6 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 	rcu_read_unlock();
 
 	alloc = max(newlen, NF_CT_EXT_PREALLOC);
-	kmemleak_not_leak(old);
 	new = __krealloc(old, alloc, gfp);
 	if (!new)
 		return NULL;
-- 
2.23.0.581.g78d2f28ef7-goog