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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2018-08-06 21:06:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-22 08:46:08 +0300 |
| commit | 36e55fde4ccf2e4a6e250ce6ded00c7b72fb7a46 (patch) | |
| tree | 9272bd78dd92f828e062c48cece7b1da1b175b8a /net/vmw_vsock | |
| parent | 4396f5024b9e356c2ba069be8e92e0b113900d49 (diff) | |
| download | linux-36e55fde4ccf2e4a6e250ce6ded00c7b72fb7a46.tar.xz | |
vsock: split dwork to avoid reinitializations
[ Upstream commit 455f05ecd2b219e9a216050796d30c830d9bc393 ]
syzbot reported that we reinitialize an active delayed
work in vsock_stream_connect():
ODEBUG: init active (active state 0) object type: timer_list hint:
delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1414
WARNING: CPU: 1 PID: 11518 at lib/debugobjects.c:329
debug_print_object+0x16a/0x210 lib/debugobjects.c:326
The pattern is apparently wrong, we should only initialize
the dealyed work once and could repeatly schedule it. So we
have to move out the initializations to allocation side.
And to avoid confusion, we can split the shared dwork
into two, instead of re-using the same one.
Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Reported-by: <syzbot+8a9b1bd330476a4f3db6@syzkaller.appspotmail.com>
Cc: Andy king <acking@vmware.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/vmw_vsock')
| -rw-r--r-- | net/vmw_vsock/af_vsock.c | 15 | ||||
| -rw-r--r-- | net/vmw_vsock/vmci_transport.c | 3 |
2 files changed, 9 insertions, 9 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index dfc8c51e4d74..f2fd556c1233 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -449,14 +449,14 @@ static int vsock_send_shutdown(struct sock *sk, int mode) return transport->shutdown(vsock_sk(sk), mode); } -void vsock_pending_work(struct work_struct *work) +static void vsock_pending_work(struct work_struct *work) { struct sock *sk; struct sock *listener; struct vsock_sock *vsk; bool cleanup; - vsk = container_of(work, struct vsock_sock, dwork.work); + vsk = container_of(work, struct vsock_sock, pending_work.work); sk = sk_vsock(vsk); listener = vsk->listener; cleanup = true; @@ -496,7 +496,6 @@ out: sock_put(sk); sock_put(listener); } -EXPORT_SYMBOL_GPL(vsock_pending_work); /**** SOCKET OPERATIONS ****/ @@ -595,6 +594,8 @@ static int __vsock_bind(struct sock *sk, struct sockaddr_vm *addr) return retval; } +static void vsock_connect_timeout(struct work_struct *work); + struct sock *__vsock_create(struct net *net, struct socket *sock, struct sock *parent, @@ -637,6 +638,8 @@ struct sock *__vsock_create(struct net *net, vsk->sent_request = false; vsk->ignore_connecting_rst = false; vsk->peer_shutdown = 0; + INIT_DELAYED_WORK(&vsk->connect_work, vsock_connect_timeout); + INIT_DELAYED_WORK(&vsk->pending_work, vsock_pending_work); psk = parent ? vsock_sk(parent) : NULL; if (parent) { @@ -1116,7 +1119,7 @@ static void vsock_connect_timeout(struct work_struct *work) struct vsock_sock *vsk; int cancel = 0; - vsk = container_of(work, struct vsock_sock, dwork.work); + vsk = container_of(work, struct vsock_sock, connect_work.work); sk = sk_vsock(vsk); lock_sock(sk); @@ -1220,9 +1223,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr, * timeout fires. */ sock_hold(sk); - INIT_DELAYED_WORK(&vsk->dwork, - vsock_connect_timeout); - schedule_delayed_work(&vsk->dwork, timeout); + schedule_delayed_work(&vsk->connect_work, timeout); /* Skip ahead to preserve error code set above. */ goto out_wait; diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c index 10ae7823a19d..d5be519b0271 100644 --- a/net/vmw_vsock/vmci_transport.c +++ b/net/vmw_vsock/vmci_transport.c @@ -1091,8 +1091,7 @@ static int vmci_transport_recv_listen(struct sock *sk, vpending->listener = sk; sock_hold(sk); sock_hold(pending); - INIT_DELAYED_WORK(&vpending->dwork, vsock_pending_work); - schedule_delayed_work(&vpending->dwork, HZ); + schedule_delayed_work(&vpending->pending_work, HZ); out: return err; |