From 19633e129c65e5bb62b1af545c5479afcdb01fc4 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 17 Jun 2009 05:23:27 +0000 Subject: [PATCH] skbuff: skb_mac_header_was_set is always true on >32 bit Looking at the crash in log_martians(), one suspect is that the check for mac header being set is not correct. The value of mac_header defaults to 0 on allocation, therefore skb_mac_header_was_set will always be true on platforms using NET_SKBUFF_USES_OFFSET. Signed-off-by: Stephen Hemminger Acked-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/core/skbuff.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 1a94a303737..436695d8deb 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -201,6 +201,10 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, skb->data = data; skb_reset_tail_pointer(skb); skb->end = skb->tail + size; +#ifdef NET_SKBUFF_DATA_USES_OFFSET + skb->mac_header = ~0U; +#endif + /* make sure we initialize shinfo sequentially */ shinfo = skb_shinfo(skb); atomic_set(&shinfo->dataref, 1); -- 2.20.1