[Bug 121091] New: guest os kernel report "virtio_net virtio0: input.0:id 0 is not a head!" and then kernel block

[Bug 121091] New: guest os kernel report "virtio_net virtio0: input.0:id 0 is not a head!" and then kernel block

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=121091

            Bug ID: 121091
           Summary: guest os kernel report "virtio_net virtio0: input.0:id
                    0 is not a head!" and then kernel block
           Product: Virtualization
           Version: unspecified
    Kernel Version: 3.18
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: yuewenyuan31837@126.com
        Regression: No

environment:
host kernel version: 3.14.23
QEMU emulator version: 2.1.3
guest os kernel version: 3.18.20
reproduce problem:
1.start vm with 2vcpus
2.attach interface
3.detach interface

cpu stack:
crash> bt
PID: 0      TASK: ffffffff81818450  CPU: 0   COMMAND: "swapper/0"
    [exception RIP: virtnet_poll+60]
    RIP: ffffffff81330386  RSP: ffff88007fc03e88  RFLAGS: 00000246
    RAX: dead000000100100  RBX: ffff88007a6af808  RCX: 0000000000000100
    RDX: dead000000200200  RSI: 0000000000000000  RDI: 0000000000000246
    RBP: 0000000000000000   R8: 0000000000000000   R9: 00000000ffffffff
    R10: 00000000ffffffff  R11: ffff88007a6af808  R12: 0000000000000040
    R13: ffff88007a6af800  R14: 0000000000000103  R15: ffff88007fc13990
    CS: 0010  SS: 0018
 #0 [ffff88007fc03eb0] net_rx_action at ffffffff81373640
 #1 [ffff88007fc03f10] __do_softirq at ffffffff8104de17
 #2 [ffff88007fc03f70] irq_exit at ffffffff8104e0de
 #3 [ffff88007fc03f80] do_IRQ at ffffffff8100ee6b
--- <IRQ stack> ---
 #4 [ffffffff81803e48] ret_from_intr at ffffffff8143466d
    [exception RIP: native_safe_halt+2]
    RIP: ffffffff8103b923  RSP: ffffffff81803ef0  RFLAGS: 00000246
    RAX: 0000000000000000  RBX: ffff88007fc0da00  RCX: 00000000ffffffff
    RDX: ffffffff81842f00  RSI: 0000000000000000  RDI: ffffffff81800000
    RBP: 0000000000000000   R8: 0000000000000000   R9: 0000000000000000
    R10: 000000000000b464  R11: 000000000000b464  R12: 0000000000000000
    R13: 0000000101432bf8  R14: 00004d52b5fe5100  R15: 0000000000000017
    ORIG_RAX: ffffffffffffff1e  CS: 0010  SS: 0018
 #5 [ffffffff81803ef0] default_idle at ffffffff810153a9
 #6 [ffffffff81803f00] cpu_startup_entry at ffffffff81075463
 #7 [ffffffff81803f60] start_kernel at ffffffff818d1efb
 #8 [ffffffff81803f78] early_idt_handler_array at ffffffff818d1117
 #9 [ffffffff81803f98] early_idt_handler_array at ffffffff818d1117
#10 [ffffffff81803fb0] x86_64_start_kernel at ffffffff818d15fe

I revert the commit 78fd1d0ab072d4d9b5f0b7c14a1516665170b565 and this problem
will not happen again. Guest os with kernel 3.19 and 4.0 was tested, and this
problem is still there.

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[Bug 121091] guest os kernel report "virtio_net virtio0: input.0:id 0 is not a head!" and then kernel block

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=121091

yuewenyuan <yuewenyuan31837@126.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|3.18                        |3.18~4.0

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[Bug 121091] guest os kernel report "virtio_net virtio0: input.0:id 0 is not a head!" and then kernel block

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=121091

yuewenyuan <yuewenyuan31837@126.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|kvm                         |Network
            Version|unspecified                 |2.5
            Product|Virtualization              |Drivers

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[Bug 121091] guest os kernel report "virtio_net virtio0: input.0:id 0 is not a head!" and then kernel block

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=121091

yuewenyuan <yuewenyuan31837@126.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |high

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