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ipv6: remove printk

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ipv6_find_hdr() prints a non-rate limited error message
when it cannot find an ipv6 header at a specific offset.
This could be used as a DoS, so just remove it.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonathan Lemon 2019-07-26 12:16:09 -07:00 committed by David S. Miller
parent edcde3ee57
commit 280b0b8e89
1 changed files with 1 additions and 3 deletions
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4
net/ipv6/exthdrs_core.c
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@ -197,10 +197,8 @@ int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
struct ipv6hdr _ip6, *ip6;
ip6 = skb_header_pointer(skb, *offset, sizeof(_ip6), &_ip6);
if (!ip6 || (ip6->version != 6)) {
printk(KERN_ERR "IPv6 header not found\n");
if (!ip6 || (ip6->version != 6))
return -EBADMSG;
}
start = *offset + sizeof(struct ipv6hdr);
nexthdr = ip6->nexthdr;
}