[Bugme-new] [Bug 21372] New: NULL pointer deference at disk_replace_part_tbl+0x32

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=21372

           Summary: NULL pointer deference at disk_replace_part_tbl+0x32
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.36
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: USB
        AssignedTo: greg at kroah.com
        ReportedBy: mcgrof at gmail.com
                CC: rjw at sisk.pl
        Regression: Yes


I get the following NULL pointer dereference when I hook up my Nexus One to my
laptop to enable USB tether. This is a regression between v2.6.36-rc8 and
v2.6.36. I will bisect when I get a chance.

input: TPPS/2 IBM TrackPoint as
/devices/platform/i8042/serio1/serio2/input/input7
usb 1-3: USB disconnect, address 4
BUG: unable to handle kernel NULL pointer dereference at 00000000000003a0
IP: [<ffffffff812aec32>] disk_replace_part_tbl+0x32/0x80
PGD 0 
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
CPU 0 
Modules linked in: <etc>
Pid: 22, comm: khubd Not tainted 2.6.36-wl+ #13 6460DWU/6460DWU
RIP: 0010:[<ffffffff812aec32>]  [<ffffffff812aec32>]
disk_replace_part_tbl+0x32/0x80
RSP: 0018:ffff88003b921990  EFLAGS: 00010282
RAX: ffffea0000cd0708 RBX: ffff880038a0cee0 RCX: ffff88003d001490
RDX: ffffea0000cb5c40 RSI: 0000000000000000 RDI: ffff880039f61df8
RBP: ffff88003b9219a0 R08: 0000000000000000 R09: ffff88003a1a58a8
R10: dead000000100100 R11: 0000000000000228 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8800388f6e98 R15: 0000000000000293
FS:  0000000000000000(0000) GS:ffff88003ec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000000003a0 CR3: 0000000001a24000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process khubd (pid: 22, threadinfo ffff88003b920000, task ffff88003b918000)
Stack:
 ffff880039f61df8 ffffffff81a67a60 ffff88003b9219c0 ffffffff812aed08
<0> ffff88003b9219c0 0000000000000000 ffff88003b9219e0 ffffffff813833f7
<0> 0000000000000086 ffff880039f61e68 ffff88003b921a10 ffffffff812bcd87
Call Trace:

 [<ffffffff812aed08>] disk_release+0x28/0x50
 [<ffffffff813833f7>] device_release+0x27/0xa0
 [<ffffffff812bcd87>] kobject_release+0x47/0x90
 [<ffffffff812bcd40>] ? kobject_release+0x0/0x90
 [<ffffffff812be1e7>] kref_put+0x37/0x70
 [<ffffffff812bcc47>] kobject_put+0x27/0x60
 [<ffffffff812bcd40>] ? kobject_release+0x0/0x90
 [<ffffffff812aed47>] put_disk+0x17/0x20
 [<ffffffff813c3c37>] sg_device_destroy+0x67/0xa0
 [<ffffffff813c3bd0>] ? sg_device_destroy+0x0/0xa0
 [<ffffffff812be1e7>] kref_put+0x37/0x70
 [<ffffffff813c3b9e>] sg_remove+0xfe/0x130
 [<ffffffff81383d51>] device_del+0xc1/0x1d0
 [<ffffffff81383e76>] device_unregister+0x16/0x30
 [<ffffffff813b6e95>] __scsi_remove_device+0xa5/0xc0
 [<ffffffff813b322c>] scsi_forget_host+0x5c/0x80
 [<ffffffff813aab1f>] scsi_remove_host+0x6f/0x120
 [<ffffffffa004c46b>] quiesce_and_remove_host+0x6b/0xc0 [usb_storage]
 [<ffffffffa004c592>] usb_stor_disconnect+0x22/0x40 [usb_storage]
 [<ffffffff8140934a>] usb_unbind_interface+0x5a/0x1a0
 [<ffffffff81387055>] __device_release_driver+0x75/0xe0
 [<ffffffff813871bd>] device_release_driver+0x2d/0x40
 [<ffffffff8138617e>] bus_remove_device+0xae/0xf0
 [<ffffffff81383db7>] device_del+0x127/0x1d0
 [<ffffffff81405be0>] usb_disable_device+0x70/0x130
 [<ffffffff813fee13>] usb_disconnect+0x93/0x130
 [<ffffffff814004e7>] hub_thread+0x487/0x1230
 [<ffffffff8105a5fb>] ? dequeue_task_fair+0x8b/0x90
 [<ffffffff81082900>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff81400060>] ? hub_thread+0x0/0x1230
 [<ffffffff810823a6>] kthread+0x96/0xa0
 [<ffffffff8100bea4>] kernel_thread_helper+0x4/0x10
 [<ffffffff81082310>] ? kthread+0x0/0xa0
 [<ffffffff8100bea0>] ? kernel_thread_helper+0x0/0x10
Code: 10 48 89 1c 24 4c 89 64 24 08 0f 1f 44 00 00 48 8b 5f 38 4c 8b a7 00 03
00 00 48 85 db 48 89 77 38 74 42 48 c7 43 18 00 00 00 00 <49> 8b bc 24 a0 03 00
00 e8 61 58 2c 00 4c 89 e7 e8 89 2e ff ff 
RIP  [<ffffffff812aec32>] disk_replace_part_tbl+0x32/0x80
 RSP <ffff88003b921990>
CR2: 00000000000003a0
---[ end trace 4704f0507cd6c869 ]---

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