• Jorge E. Moreira's avatar
    vsock/virtio: Initialize core virtio vsock before registering the driver · 545daadb
    Jorge E. Moreira authored
    [ Upstream commit ba95e5dfd36647622d8897a2a0470dde60e59ffd ]
    
    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: default avatarJorge E. Moreira <jemoreira@google.com>
    Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
    Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    Acked-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    545daadb
Name
Last commit
Last update
..
Kconfig Loading commit data...
Makefile Loading commit data...
af_vsock.c Loading commit data...
af_vsock_tap.c Loading commit data...
hyperv_transport.c Loading commit data...
virtio_transport.c Loading commit data...
virtio_transport_common.c Loading commit data...
vmci_transport.c Loading commit data...
vmci_transport.h Loading commit data...
vmci_transport_notify.c Loading commit data...
vmci_transport_notify.h Loading commit data...
vmci_transport_notify_qstate.c Loading commit data...
vsock_addr.c Loading commit data...