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authorHannes Frederic Sowa <hannes@stressinduktion.org>2016-04-05 18:10:15 +0300
committerDavid S. Miller <davem@davemloft.net>2016-04-07 23:44:14 +0300
commit1e1d04e678cf72442f57ce82803c7a407769135f (patch)
tree8ea1054b59c4abe211ffff0b81f34589b0089f22 /net/ipv6/ipv6_sockglue.c
parent61881cfb5ad80c1d0a46ca6d08b7e271892b2ff6 (diff)
downloadlinux-1e1d04e678cf72442f57ce82803c7a407769135f.tar.xz
net: introduce lockdep_is_held and update various places to use it
The socket is either locked if we hold the slock spin_lock for lock_sock_fast and unlock_sock_fast or we own the lock (sk_lock.owned != 0). Check for this and at the same time improve that the current thread/cpu is really holding the lock. Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
-rw-r--r--net/ipv6/ipv6_sockglue.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index a5557d22f89e..4ff4b29894eb 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -407,7 +407,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW))
break;
- opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk));
+ opt = rcu_dereference_protected(np->opt,
+ lockdep_sock_is_held(sk));
opt = ipv6_renew_options(sk, opt, optname,
(struct ipv6_opt_hdr __user *)optval,
optlen);
@@ -1124,7 +1125,8 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
struct ipv6_txoptions *opt;
lock_sock(sk);
- opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk));
+ opt = rcu_dereference_protected(np->opt,
+ lockdep_sock_is_held(sk));
len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len);
release_sock(sk);
/* check if ipv6_getsockopt_sticky() returns err code */