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| author | Eric Dumazet <edumazet@google.com> | 2026-03-12 23:18:23 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-14 18:38:06 +0300 |
| commit | d15d3de94a4766fb43d7fe7a72ed0479fb268131 (patch) | |
| tree | e9a6d6bec7959250dde915f6a49f44f021d6d719 | |
| parent | b58e3a2d014567a9092eb026fe677ff4bed5af38 (diff) | |
| download | linux-d15d3de94a4766fb43d7fe7a72ed0479fb268131.tar.xz | |
net: dropreason: add SKB_DROP_REASON_RECURSION_LIMIT
ip[6]tunnel_xmit() can drop packets if a too deep recursion level
is detected.
Add SKB_DROP_REASON_RECURSION_LIMIT drop reason.
We will use this reason later in __dev_queue_xmit().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260312201824.203093-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/net/dropreason-core.h | 3 | ||||
| -rw-r--r-- | include/net/ip6_tunnel.h | 2 | ||||
| -rw-r--r-- | net/ipv4/ip_tunnel_core.c | 2 |
3 files changed, 5 insertions, 2 deletions
diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index 5c8c2eb3d2c5..de61dd5dbfd9 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -123,6 +123,7 @@ FN(PFMEMALLOC) \ FN(PSP_INPUT) \ FN(PSP_OUTPUT) \ + FN(RECURSION_LIMIT) \ FNe(MAX) /** @@ -582,6 +583,8 @@ enum skb_drop_reason { SKB_DROP_REASON_PSP_INPUT, /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ SKB_DROP_REASON_PSP_OUTPUT, + /** @SKB_DROP_REASON_RECURSION_LIMIT: Dead loop on virtual device. */ + SKB_DROP_REASON_RECURSION_LIMIT, /** * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which * shouldn't be used as a real 'reason' - only for tracing code gen diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h index 359b595f1df9..b99805ee2fd1 100644 --- a/include/net/ip6_tunnel.h +++ b/include/net/ip6_tunnel.h @@ -162,7 +162,7 @@ static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, dev->name); DEV_STATS_INC(dev, tx_errors); } - kfree_skb(skb); + kfree_skb_reason(skb, SKB_DROP_REASON_RECURSION_LIMIT); return; } diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 5683c328990f..f430d6f0463e 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -65,7 +65,7 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, DEV_STATS_INC(dev, tx_errors); } ip_rt_put(rt); - kfree_skb(skb); + kfree_skb_reason(skb, SKB_DROP_REASON_RECURSION_LIMIT); return; } |