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chtls: Added a check to avoid NULL pointer dereference

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[ Upstream commit eade1e0a4fb31d48eeb1589d9bb859ae4dd6181d ]

In case of server removal lookup_stid() may return NULL pointer, which
is used as listen_ctx. So added a check before accessing this pointer.

Fixes: cc35c88ae4 ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ayush Sawal 2021-01-06 09:59:11 +05:30 • committed by Greg Kroah-Hartman
commit fac9b53cfa
1 changed files with 5 additions and 0 deletions
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5
drivers/crypto/chelsio/chtls/chtls_cm.c
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@ -1453,6 +1453,11 @@ static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb)
sk_wake_async(sk, 0, POLL_OUT);
data = lookup_stid(cdev->tids, stid);
if (!data) {
/* listening server close */
kfree_skb(skb);
goto unlock;
}
lsk = ((struct listen_ctx *)data)->lsk;
bh_lock_sock(lsk);