From 9ff5c59ce278c37bca22fbf98076d199bcaf9845 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Wed, 12 Oct 2005 15:59:39 -0700 Subject: [PATCH] [TCP]: Add code to help track down "BUG at net/ipv4/tcp_output.c:438!" This is the second report of this bug. Unfortunately the first reporter hasn't been able to reproduce it since to provide more debugging info. So let's apply this patch for 2.6.14 to 1) Make this non-fatal. 2) Provide the info we need to track it down. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 8225e4257258..f37a50e55b68 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -435,7 +435,14 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss int nsize, old_factor; u16 flags; - BUG_ON(len >= skb->len); + if (unlikely(len >= skb->len)) { + printk(KERN_DEBUG "TCP: seg_size=%u, mss=%u, seq=%u, " + "end_seq=%u, skb->len=%u.\n", len, mss_now, + TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq, + skb->len); + WARN_ON(1); + return 0; + } nsize = skb_headlen(skb) - len; if (nsize < 0) -- 2.30.2