khubd crash on scanner disconnect

From: Matthias Andree (matthias.andree_at_gmx.de)
Date: 01/30/04

  • Next message: Jamie Lokier: "Re: [RFC][PATCH] linux-2.6.2-rc2_vsyscall-gtod_B1.patch" 
    Date:	Fri, 30 Jan 2004 18:36:56 +0100
To: Linux-Kernel mailing list <linux-kernel@vger.kernel.org>

    Hi,

    I have just caught this khubd NULL dereference simply by unplugging my
    scanner. Kernel is a current 2.6.2-rc2 from BK, PNP enabled:

    usb 1-1: USB disconnect, address 2
    Unable to handle kernel NULL pointer dereference at virtual address 0000001e
     printing eip:
    c0299a9c
    *pde = 00000000
    Oops: 0000 [#1]
    CPU: 0
    EIP: 0060:[<c0299a9c>] Not tainted
    EFLAGS: 00010282
    EIP is at disconnect_scanner+0x2c/0x5f
    eax: ffffffff ebx: d3d25094 ecx: c03d76d8 edx: 00000030
    esi: 00000000 edi: d3cb28c0 ebp: d3dc1e24 esp: d3dc1e14
    ds: 007b es: 007b ss: 0068
    Process khubd (pid: 5, threadinfo=d3dc0000 task=d3f8e040)
    Stack: d3d25080 c03d76d8 d3d25080 c03d7740 d3dc1e40 c02824f6 d3d25080 d3d25080
           d3d25094 d3d25094 c03d7760 d3dc1e58 c023b456 d3d25094 d3d250c0 d3cb28fc
           d3cb28e8 d3dc1e74 c02993ec d3d25094 d3d25080 d3cb28fc c03d766c 00000000
    Call Trace:
     [<c02824f6>] usb_unbind_interface+0x76/0x80
     [<c023b456>] device_release_driver+0x66/0x70
     [<c02993ec>] destroy_scanner+0x7c/0xe0
     [<c01e3225>] kobject_cleanup+0x95/0xa0
     [<c02824f6>] usb_unbind_interface+0x76/0x80
     [<c023b456>] device_release_driver+0x66/0x70
     [<c023b5cd>] bus_remove_device+0x6d/0xb0
     [<c023a394>] device_del+0x74/0xd0
     [<c0288a20>] usb_disable_device+0x90/0xc0
     [<c0282fd4>] usb_disconnect+0xd4/0x120
     [<c028562f>] hub_port_connect_change+0x22f/0x350
     [<c0285041>] hub_port_status+0x41/0xb0
     [<c02859c6>] hub_events+0x276/0x330
     [<c0285ad3>] hub_thread+0x53/0x110
     [<c011f6c0>] default_wake_function+0x0/0x20
     [<c0285a80>] hub_thread+0x0/0x110
     [<c01092a9>] kernel_thread_helper+0x5/0xc

    Code: 80 7e 1e 00 75 16 85 f6 74 21 8d 46 3c 8b 5d f8 8b 75 fc 89 

    -- 
Matthias Andree
Encrypt your mail: my GnuPG key ID is 0x052E7D95
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  • Next message: Jamie Lokier: "Re: [RFC][PATCH] linux-2.6.2-rc2_vsyscall-gtod_B1.patch"

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