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platform_kernel-5.15
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dst: Clone child entry in skb_dst_pop 

We clone the child entry in skb_dst_pop before we call
skb_dst_drop(). Otherwise we might kill the child right
before we return it to the caller.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steffen Klassert 2011-03-15 21:09:32 +00:00 committed by David S. Miller
parent 3bc07321cc
commit e433430a0c
2 changed files with 2 additions and 2 deletions
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2
include/net/dst.h
View File

@ -345,7 +345,7 @@ static inline void skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
static inline struct dst_entry *skb_dst_pop(struct sk_buff *skb) static inline struct dst_entry *skb_dst_pop(struct sk_buff *skb)
{ {
struct dst_entry *child = skb_dst(skb)->child; struct dst_entry *child = dst_clone(skb_dst(skb)->child);
skb_dst_drop(skb); skb_dst_drop(skb);
return child; return child;

2
net/xfrm/xfrm_output.c
View File

@ -96,7 +96,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
err = -EHOSTUNREACH; err = -EHOSTUNREACH;
goto error_nolock; goto error_nolock;
} }
skb_dst_set(skb, dst_clone(dst)); skb_dst_set(skb, dst);
x = dst->xfrm; x = dst->xfrm;
} while (x && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)); } while (x && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL));