mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-23 00:20:52 -05:00
Code Activity

ipv6: raw: Deduct extension header length in rawv6_push_pending_frames

Browse source 
The total cork length created by ip6_append_data includes extension
headers, so we must exclude them when comparing them against the
IPV6_CHECKSUM offset which does not include extension headers.

Reported-by: Kyle Zeng <zengyhkyle@gmail.com>
Fixes: 357b40a18b ("[IPV6]: IPV6_CHECKSUM socket option can corrupt kernel memory")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2023-01-10 08:59:06 +08:00 committed by David S. Miller
parent b0e380b5d4
commit cb3e9864cd
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
net/ipv6/raw.c
View file

@ -505,6 +505,7 @@ static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
struct raw6_sock *rp)
{
struct ipv6_txoptions *opt;
struct sk_buff *skb;
int err = 0;
int offset;
@ -522,6 +523,9 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
offset = rp->offset;
total_len = inet_sk(sk)->cork.base.length;
opt = inet6_sk(sk)->cork.opt;
total_len -= opt ? opt->opt_flen : 0;
if (offset >= total_len - 1) {
err = -EINVAL;
ip6_flush_pending_frames(sk);