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| author | David Ahern <dsahern@gmail.com> | 2019-01-05 07:35:04 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-05 14:17:07 -0800 |
| commit | d4a7e9bb74b5aaf07b89f6531c080b1130bdf019 (patch) | |
| tree | 82ae9e9a5c557f6d765aea8eaedb778cc45c1bfd /net/ipv6/af_inet6.c | |
| parent | ec90ad334986fa5856d11dd272f7f22fa86c55c4 (diff) | |
| download | lwn-d4a7e9bb74b5aaf07b89f6531c080b1130bdf019.tar.gz lwn-d4a7e9bb74b5aaf07b89f6531c080b1130bdf019.zip | |
ipv6: Take rcu_read_lock in __inet6_bind for mapped addresses
I realized the last patch calls dev_get_by_index_rcu in a branch not
holding the rcu lock. Add the calls to rcu_read_lock and rcu_read_unlock.
Fixes: ec90ad334986 ("ipv6: Consider sk_bound_dev_if when binding a socket to a v4 mapped address")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 93288b9f1697..d99753b5e39b 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -321,17 +321,20 @@ static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, goto out; } + rcu_read_lock(); if (sk->sk_bound_dev_if) { dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); if (!dev) { err = -ENODEV; - goto out; + goto out_unlock; } } /* Reproduce AF_INET checks to make the bindings consistent */ v4addr = addr->sin6_addr.s6_addr32[3]; chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); + rcu_read_unlock(); + if (!inet_can_nonlocal_bind(net, inet) && v4addr != htonl(INADDR_ANY) && chk_addr_ret != RTN_LOCAL && |