From cc63f70b8b410eb653449151821f6b8b9af6ca42 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 6 Feb 2007 14:35:25 -0800 Subject: [IPV4/IPV6] multicast: Check add_grhead() return value add_grhead() allocates memory with GFP_ATOMIC and in at least two places skb from it passed to skb_put() without checking. Signed-off-by: Alexey Dobriyan Signed-off-by: David S. Miller --- net/ipv4/igmp.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/ipv4/igmp.c') diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 0017ccb01d6..024ae56cab2 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -455,6 +455,8 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc, skb = add_grhead(skb, pmc, type, &pgr); first = 0; } + if (!skb) + return NULL; psrc = (__be32 *)skb_put(skb, sizeof(__be32)); *psrc = psf->sf_inaddr; scount++; stotal++; -- cgit v1.2.3-70-g09d2