From: Alexey Dobriyan <[EMAIL PROTECTED]>
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
net/ipv4/igmp.c | 2 ++
net/ipv6/mcast.c | 2 ++
2 files changed, 4 insertions(+)
--- linux-2.6.20.1.orig/net/ipv4/igmp.c
+++ linux-2.6.20.1/net/ipv4/igmp.c
@@ -455,6 +455,8 @@ static struct sk_buff *add_grec(struct s
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++;
--- linux-2.6.20.1.orig/net/ipv6/mcast.c
+++ linux-2.6.20.1/net/ipv6/mcast.c
@@ -1582,6 +1582,8 @@ static struct sk_buff *add_grec(struct s
skb = add_grhead(skb, pmc, type, &pgr);
first = 0;
}
+ if (!skb)
+ return NULL;
psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
*psrc = psf->sf_addr;
scount++; stotal++;
--
-
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