diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-10-10 19:12:32 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-10 20:24:29 -0700 |
| commit | 75cb070960ade40fba5de32138390f3c85c90941 (patch) | |
| tree | 0a2ff2fbc1f4ba7381f5ea88b716d732c66e6f63 | |
| parent | befc7a3324b45b7478b29861f2a77f8b2bc17922 (diff) | |
Revert "net: defer call to cgroup_sk_alloc()"
This reverts commit fbb1fb4ad415cb31ce944f65a5ca700aaf73a227.
This was not the proper fix, lets cleanly revert it, so that
following patch can be carried to stable versions.
sock_cgroup_ptr() callers do not expect a NULL return value.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | kernel/cgroup/cgroup.c | 11 | ||||
| -rw-r--r-- | net/core/sock.c | 3 | ||||
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 5 |
3 files changed, 13 insertions, 6 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 3380a3e49af5..44857278eb8a 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5709,6 +5709,17 @@ void cgroup_sk_alloc(struct sock_cgroup_data *skcd) if (cgroup_sk_alloc_disabled) return; + /* Socket clone path */ + if (skcd->val) { + /* + * We might be cloning a socket which is left in an empty + * cgroup and the cgroup might have already been rmdir'd. + * Don't use cgroup_get_live(). + */ + cgroup_get(sock_cgroup_ptr(skcd)); + return; + } + rcu_read_lock(); while (true) { diff --git a/net/core/sock.c b/net/core/sock.c index 4499e3153813..70c6ccbdf49f 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1680,7 +1680,6 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) /* sk->sk_memcg will be populated at accept() time */ newsk->sk_memcg = NULL; - memset(&newsk->sk_cgrp_data, 0, sizeof(newsk->sk_cgrp_data)); atomic_set(&newsk->sk_drops, 0); newsk->sk_send_head = NULL; @@ -1719,6 +1718,8 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) newsk->sk_incoming_cpu = raw_smp_processor_id(); atomic64_set(&newsk->sk_cookie, 0); + cgroup_sk_alloc(&newsk->sk_cgrp_data); + /* * Before updating sk_refcnt, we must commit prior changes to memory * (Documentation/RCU/rculist_nulls.txt for details) diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index d32c74507314..67aec7a10686 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -26,8 +26,6 @@ #include <net/tcp.h> #include <net/sock_reuseport.h> #include <net/addrconf.h> -#include <net/cls_cgroup.h> -#include <net/netprio_cgroup.h> #ifdef INET_CSK_DEBUG const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n"; @@ -478,9 +476,6 @@ struct sock *inet_csk_accept(struct sock *sk, int flags, int *err, bool kern) spin_unlock_bh(&queue->fastopenq.lock); } mem_cgroup_sk_alloc(newsk); - cgroup_sk_alloc(&newsk->sk_cgrp_data); - sock_update_classid(&newsk->sk_cgrp_data); - sock_update_netprioidx(&newsk->sk_cgrp_data); out: release_sock(sk); if (req) |