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From: Xin Long <lucien.xin@gmail.com>
Date: Tue, 30 Apr 2024 10:03:38 -0400
Subject: tipc: fix a possible memleak in tipc_buf_append
Origin: https://git.kernel.org/linus/97bf6f81b29a8efaf5d0983251a7450e5794370d
__skb_linearize() doesn't free the skb when it fails, so move
'*buf = NULL' after __skb_linearize(), so that the skb can be
freed on the err path.
Fixes: b7df21cf1b79 ("tipc: skb_linearize the head skb when reassembling msgs")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Link: https://lore.kernel.org/r/90710748c29a1521efac4f75ea01b3b7e61414cf.1714485818.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
net/tipc/msg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index 9a6e9bcbf694..76284fc538eb 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -142,9 +142,9 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
if (fragid == FIRST_FRAGMENT) {
if (unlikely(head))
goto err;
- *buf = NULL;
if (skb_has_frag_list(frag) && __skb_linearize(frag))
goto err;
+ *buf = NULL;
frag = skb_unshare(frag, GFP_ATOMIC);
if (unlikely(!frag))
goto err;
--
2.43.0
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