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net/x25: Fix skb leak in x25_lapb_receive_frame()

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[ Upstream commit 2929cceb2f ]

x25_lapb_receive_frame() using skb_copy() to get a private copy of
skb, the new skb should be freed in the undersized/fragmented skb
error handling path. Otherwise there is a memory leak.

Fixes: cb101ed2c3 ("x25: Handle undersized/fragmented skbs")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Link: https://lore.kernel.org/r/20221114110519.514538-1-weiyongjun@huaweicloud.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wei Yongjun
2022-11-14 11:05:19 +00:00
committed by Greg Kroah-Hartman
parent 94822d2331
commit 9f00da9c86
1 changed files with 1 additions and 1 deletions
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2
net/x25/x25_dev.c
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@@ -117,7 +117,7 @@ int x25_lapb_receive_frame(struct sk_buff *skb, struct net_device *dev,
if (!pskb_may_pull(skb, 1)) { if (!pskb_may_pull(skb, 1)) {
x25_neigh_put(nb); x25_neigh_put(nb);
return 0; goto drop;
} }
switch (skb->data[0]) { switch (skb->data[0]) {