From: Harshvardhan Jha <harshvardhan.jha@oracle.com>
Date: Sun, 25 Jul 2021 17:53:55 +0000 (+0530)
Subject: net: xfrm: Fix end of loop tests for list_for_each_entry
X-Git-Tag: v5.14-rc5~25^2~7^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=480e93e12aa04d857f7cc2e6fcec181c0d690404;p=thirdparty%2Fkernel%2Flinux.git

net: xfrm: Fix end of loop tests for list_for_each_entry

The list_for_each_entry() iterator, "pos" in this code, can never be
NULL so the warning will never be printed.

Signed-off-by: Harshvardhan Jha <harshvardhan.jha@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---

diff --git a/net/xfrm/xfrm_ipcomp.c b/net/xfrm/xfrm_ipcomp.c
index 2e8afe078d612..cb40ff0ff28da 100644
--- a/net/xfrm/xfrm_ipcomp.c
+++ b/net/xfrm/xfrm_ipcomp.c
@@ -241,7 +241,7 @@ static void ipcomp_free_tfms(struct crypto_comp * __percpu *tfms)
 			break;
 	}
 
-	WARN_ON(!pos);
+	WARN_ON(list_entry_is_head(pos, &ipcomp_tfms_list, list));
 
 	if (--pos->users)
 		return;