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authorEric Dumazet <edumazet@google.com>2025-06-30 12:19:31 +0000
committerJakub Kicinski <kuba@kernel.org>2025-07-02 14:32:30 -0700
commita74fc62eec155ca5a6da8ff3856f3dc87fe24558 (patch)
treed7e629c97015087e167aeaa02f52d23a6d8cd0d3 /net/ipv4/netfilter.c
parent88fe14253e181878c2ddb51a298ae8c468a63010 (diff)
ipv4: adopt dst_dev, skb_dst_dev and skb_dst_dev_net[_rcu]
Use the new helpers as a first step to deal with potential dst->dev races. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Link: https://patch.msgid.link/20250630121934.3399505-8-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/netfilter.c')
-rw-r--r--net/ipv4/netfilter.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index 08bc3f2c0078..0565f001120d 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -20,12 +20,12 @@
/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, unsigned int addr_type)
{
+ struct net_device *dev = skb_dst_dev(skb);
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt;
struct flowi4 fl4 = {};
__be32 saddr = iph->saddr;
__u8 flags;
- struct net_device *dev = skb_dst(skb)->dev;
struct flow_keys flkeys;
unsigned int hh_len;
@@ -74,7 +74,7 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un
#endif
/* Change in oif may mean change in hh_len. */
- hh_len = skb_dst(skb)->dev->hard_header_len;
+ hh_len = skb_dst_dev(skb)->hard_header_len;
if (skb_headroom(skb) < hh_len &&
pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)),
0, GFP_ATOMIC))