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ipv4: use WARN_ON_ONCE() in ip_rt_bug()

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It turns out ip_rt_bug() can be called more than expected.

syzbot will still panic (because of panic_on_warn=1), but non debug
kernels will no longer die while repeating stack traces on the console.

Fixes: c378a9c019 ("ipv4: Give backtrace in ip_rt_bug().")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Link: https://patch.msgid.link/20260519193248.4018872-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2026-05-19 19:32:48 +00:00 committed by Jakub Kicinski
parent 7eb72c1e39
commit e4bdef4d32
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/route.c
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@ -1272,7 +1272,7 @@ static int ip_rt_bug(struct net *net, struct sock *sk, struct sk_buff *skb)
__func__, &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr,
skb->dev ? skb->dev->name : "?");
kfree_skb(skb);
WARN_ON(1);
WARN_ON_ONCE(1);
return 0;
}