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author | Jorge E. Moreira <jemoreira@google.com> | 2019-05-16 13:51:07 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-05-18 10:50:28 -0700 |
commit | ba95e5dfd36647622d8897a2a0470dde60e59ffd (patch) | |
tree | e00d92f1fa0aa3b07301ec410f32d719b67768fa /net | |
parent | 5a35c8ea7c403871d5c533f8872f5b61f7c0d293 (diff) | |
download | linux-stable-ba95e5dfd36647622d8897a2a0470dde60e59ffd.tar.gz linux-stable-ba95e5dfd36647622d8897a2a0470dde60e59ffd.tar.bz2 linux-stable-ba95e5dfd36647622d8897a2a0470dde60e59ffd.zip |
vsock/virtio: Initialize core virtio vsock before registering the driver
Avoid a race in which static variables in net/vmw_vsock/af_vsock.c are
accessed (while handling interrupts) before they are initialized.
[ 4.201410] BUG: unable to handle kernel paging request at ffffffffffffffe8
[ 4.207829] IP: vsock_addr_equals_addr+0x3/0x20
[ 4.211379] PGD 28210067 P4D 28210067 PUD 28212067 PMD 0
[ 4.211379] Oops: 0000 [#1] PREEMPT SMP PTI
[ 4.211379] Modules linked in:
[ 4.211379] CPU: 1 PID: 30 Comm: kworker/1:1 Not tainted 4.14.106-419297-gd7e28cc1f241 #1
[ 4.211379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 4.211379] Workqueue: virtio_vsock virtio_transport_rx_work
[ 4.211379] task: ffffa3273d175280 task.stack: ffffaea1800e8000
[ 4.211379] RIP: 0010:vsock_addr_equals_addr+0x3/0x20
[ 4.211379] RSP: 0000:ffffaea1800ebd28 EFLAGS: 00010286
[ 4.211379] RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffffb94e42f0
[ 4.211379] RDX: 0000000000000400 RSI: ffffffffffffffe0 RDI: ffffaea1800ebdd0
[ 4.211379] RBP: ffffaea1800ebd58 R08: 0000000000000001 R09: 0000000000000001
[ 4.211379] R10: 0000000000000000 R11: ffffffffb89d5d60 R12: ffffaea1800ebdd0
[ 4.211379] R13: 00000000828cbfbf R14: 0000000000000000 R15: ffffaea1800ebdc0
[ 4.211379] FS: 0000000000000000(0000) GS:ffffa3273fd00000(0000) knlGS:0000000000000000
[ 4.211379] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.211379] CR2: ffffffffffffffe8 CR3: 000000002820e001 CR4: 00000000001606e0
[ 4.211379] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4.211379] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4.211379] Call Trace:
[ 4.211379] ? vsock_find_connected_socket+0x6c/0xe0
[ 4.211379] virtio_transport_recv_pkt+0x15f/0x740
[ 4.211379] ? detach_buf+0x1b5/0x210
[ 4.211379] virtio_transport_rx_work+0xb7/0x140
[ 4.211379] process_one_work+0x1ef/0x480
[ 4.211379] worker_thread+0x312/0x460
[ 4.211379] kthread+0x132/0x140
[ 4.211379] ? process_one_work+0x480/0x480
[ 4.211379] ? kthread_destroy_worker+0xd0/0xd0
[ 4.211379] ret_from_fork+0x35/0x40
[ 4.211379] Code: c7 47 08 00 00 00 00 66 c7 07 28 00 c7 47 08 ff ff ff ff c7 47 04 ff ff ff ff c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 8b 47 08 <3b> 46 08 75 0a 8b 47 04 3b 46 04 0f 94 c0 c3 31 c0 c3 90 66 2e
[ 4.211379] RIP: vsock_addr_equals_addr+0x3/0x20 RSP: ffffaea1800ebd28
[ 4.211379] CR2: ffffffffffffffe8
[ 4.211379] ---[ end trace f31cc4a2e6df3689 ]---
[ 4.211379] Kernel panic - not syncing: Fatal exception in interrupt
[ 4.211379] Kernel Offset: 0x37000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 4.211379] Rebooting in 5 seconds..
Fixes: 22b5c0b63f32 ("vsock/virtio: fix kernel panic after device hot-unplug")
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: netdev@vger.kernel.org
Cc: kernel-team@android.com
Cc: stable@vger.kernel.org [4.9+]
Signed-off-by: Jorge E. Moreira <jemoreira@google.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/vmw_vsock/virtio_transport.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c index 15eb5d3d4750..96ab344f17bb 100644 --- a/net/vmw_vsock/virtio_transport.c +++ b/net/vmw_vsock/virtio_transport.c @@ -702,28 +702,27 @@ static int __init virtio_vsock_init(void) if (!virtio_vsock_workqueue) return -ENOMEM; - ret = register_virtio_driver(&virtio_vsock_driver); + ret = vsock_core_init(&virtio_transport.transport); if (ret) goto out_wq; - ret = vsock_core_init(&virtio_transport.transport); + ret = register_virtio_driver(&virtio_vsock_driver); if (ret) - goto out_vdr; + goto out_vci; return 0; -out_vdr: - unregister_virtio_driver(&virtio_vsock_driver); +out_vci: + vsock_core_exit(); out_wq: destroy_workqueue(virtio_vsock_workqueue); return ret; - } static void __exit virtio_vsock_exit(void) { - vsock_core_exit(); unregister_virtio_driver(&virtio_vsock_driver); + vsock_core_exit(); destroy_workqueue(virtio_vsock_workqueue); } |