Commit fac9b53c authored Jan 06, 2021 by Ayush Sawal Committed by Greg Kroah-Hartman Jan 17, 2021

chtls: Added a check to avoid NULL pointer dereference



[ 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: cc35c88a ("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>

parent 38768ea1

drivers/crypto/chelsio/chtls/chtls_cm.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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);