netdev - [PATCHv2] xfrm: Fix kernel panic when flush and dump SPD entries

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Message-ID: <49334788.4030409@cn.fujitsu.com>
Date:	Mon, 01 Dec 2008 10:10:16 +0800
From:	Wei Yongjun <yjwei@...fujitsu.com>
To:	Wei Yongjun <yjwei@...fujitsu.com>
CC:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCHv2] xfrm: Fix kernel panic when flush and dump SPD entries

After flush the SPD entries, dump the SPD entries will cause kernel painc.

Used the following commands to reproduct:

- echo 'spdflush;' | setkey -c
- echo 'spdadd 3ffe:501:ffff:ff01::/64 3ffe:501:ffff:ff04::/64  any -P out ipsec \
  ah/tunnel/3ffe:501:ffff:ff00:200:ff:fe00:b0b0-3ffe:501:ffff:ff02:200:ff:fe00:a1a1/require;\
  spddump;' | setkey -c
- echo 'spdflush; spddump;' | setkey -c
- echo 'spdadd 3ffe:501:ffff:ff01::/64 3ffe:501:ffff:ff04::/64  any -P out ipsec \
  ah/tunnel/3ffe:501:ffff:ff00:200:ff:fe00:b0b0-3ffe:501:ffff:ff02:200:ff:fe00:a1a1/require;\
  spddump;' | setkey -c

This is because when flush the SPD entries, the SPD entry is not remove
from the list.

This patch fix the problem by remove the SPD entry from the list.

Signed-off-by: Wei Yongjun <yjwei@...fujitsu.com>
---
 net/xfrm/xfrm_policy.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 058f04f..fb216c9 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -817,6 +817,7 @@ int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
 				continue;
 			hlist_del(&pol->bydst);
 			hlist_del(&pol->byidx);
+			list_del(&pol->walk.all);
 			write_unlock_bh(&xfrm_policy_lock);
 
 			xfrm_audit_policy_delete(pol, 1, audit_info->loginuid,
-- 
1.6.0.2.530.g67faa



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