From: Ayush Sawal <ayush.sawal@chelsio.com>
Date: Wed, 6 Jan 2021 09:59:11 +0530
Subject: chtls: Added a check to avoid NULL pointer dereference
Patch-mainline: v5.11-rc3
Git-commit: eade1e0a4fb31d48eeb1589d9bb859ae4dd6181d
References: bsc#1104270 FATE#325931
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: cc35c88ae4db ("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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/crypto/chelsio/chtls/chtls_cm.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/crypto/chelsio/chtls/chtls_cm.c
+++ b/drivers/crypto/chelsio/chtls/chtls_cm.c
@@ -1407,6 +1407,11 @@ static int chtls_pass_establish(struct c
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);