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    SubjectRe: [PATCH 2/2] dlci: validate the net device in dlci_del()
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    From: Li Zefan <lizefan@huawei.com>
    Date: Wed, 26 Jun 2013 15:31:58 +0800

    > We triggered an oops while running trinity with 3.4 kernel:
    >
    > BUG: unable to handle kernel paging request at 0000000100000d07
    > IP: [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
    > PGD 640c0d067 PUD 0
    > Oops: 0000 [#1] PREEMPT SMP
    > CPU 3
    > ...
    > Pid: 7302, comm: trinity-child3 Not tainted 3.4.24.09+ 40 Huawei Technologies Co., Ltd. Tecal RH2285 /BC11BTSA
    > RIP: 0010:[<ffffffffa0109738>] [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
    > ...
    > Call Trace:
    > [<ffffffff8137c5c3>] sock_ioctl+0x153/0x280
    > [<ffffffff81195494>] do_vfs_ioctl+0xa4/0x5e0
    > [<ffffffff8118354a>] ? fget_light+0x3ea/0x490
    > [<ffffffff81195a1f>] sys_ioctl+0x4f/0x80
    > [<ffffffff81478b69>] system_call_fastpath+0x16/0x1b
    > ...
    >
    > It's because the net device is not a dlci device.
    >
    > Reported-by: Li Jinyue <lijinyue@huawei.com>
    > Signed-off-by: Li Zefan <lizefan@huawei.com>

    Applied and queued up for -stable.


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