On 07/20/2016 02:15 PM, Steffen Klassert wrote:
On Wed, Jul 20, 2016 at 10:32:35AM +0200, Vegard Nossum wrote:
AFAICT this message is just printed whenever input validation fails.
This is a normal failure and we shouldn't be dumping the stack over it.

Looks like it was originally a printk that was maybe incorrectly
upgraded to a WARN:

commit 62db5cfd70b1ef53aa21f144a806fe3b78c84fab
Author: stephen hemminger <shemmin...@vyatta.com>
Date:   Wed May 12 06:37:06 2010 +0000

     xfrm: add severity to printk

Cc: Stephen Hemminger <step...@networkplumber.org>
Signed-off-by: Vegard Nossum <vegard.nos...@oracle.com>
---
  net/xfrm/xfrm_user.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 4fb04ce..0b81bfc 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -2150,7 +2150,7 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct 
nlmsghdr *nlh,
        return 0;

  bad_policy:
-       WARN(1, "BAD policy passed\n");
+       printk(KERN_WARNING "xfrm_user: bad policy passed\n");

Why should we print here anything at all? If it is a normal
configuration error, we should remove the printing.


New patch attached. Thanks,


Vegard
>From 5bc56901bfea60e8d521f859ce73180796df0e56 Mon Sep 17 00:00:00 2001
From: Vegard Nossum <vegard.nos...@oracle.com>
Date: Tue, 19 Jul 2016 23:41:16 -0700
Subject: [PATCH] xfrm: get rid of incorrect WARN

AFAICT this message is just printed whenever input validation fails.
This is a normal failure and we shouldn't be dumping the stack over it.

Looks like it was originally a printk that was maybe incorrectly
upgraded to a WARN:

commit 62db5cfd70b1ef53aa21f144a806fe3b78c84fab
Author: stephen hemminger <shemmin...@vyatta.com>
Date:   Wed May 12 06:37:06 2010 +0000

    xfrm: add severity to printk

Cc: Stephen Hemminger <step...@networkplumber.org>
Cc: Steffen Klassert <steffen.klass...@secunet.com>
Signed-off-by: Vegard Nossum <vegard.nos...@oracle.com>
---
 net/xfrm/xfrm_user.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index d516845..2477b24 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -2117,7 +2117,7 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 	err = verify_newpolicy_info(&ua->policy);
 	if (err)
-		goto bad_policy;
+		goto free_state;
 
 	/*   build an XP */
 	xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
@@ -2149,8 +2149,6 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 	return 0;
 
-bad_policy:
-	WARN(1, "BAD policy passed\n");
 free_state:
 	kfree(x);
 nomem:
-- 
1.9.1

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