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Message-ID: <20240502084838.2269355-2-steffen.klassert@secunet.com>
Date: Thu, 2 May 2024 10:48:36 +0200
From: Steffen Klassert <steffen.klassert@...unet.com>
To: David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>
CC: Herbert Xu <herbert@...dor.apana.org.au>, Steffen Klassert
<steffen.klassert@...unet.com>, <netdev@...r.kernel.org>
Subject: [PATCH 1/3] xfrm: fix possible derferencing in error path
From: Antony Antony <antony.antony@...unet.com>
Fix derferencing pointer when xfrm_policy_lookup_bytype returns an
error.
Fixes: 63b21caba17e ("xfrm: introduce forwarding of ICMP Error messages")
Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Closes: https://lore.kernel.org/kernel-janitors/f6ef0d0d-96de-4e01-9dc3-c1b3a6338653@moroto.mountain/
Signed-off-by: Antony Antony <antony.antony@...unet.com>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
net/xfrm/xfrm_policy.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 6affe5cd85d8..53d8fabfa685 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -3593,6 +3593,8 @@ xfrm_policy *xfrm_in_fwd_icmp(struct sk_buff *skb,
return pol;
pol = xfrm_policy_lookup(net, &fl1, family, XFRM_POLICY_FWD, if_id);
+ if (IS_ERR(pol))
+ pol = NULL;
}
return pol;
--
2.34.1
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