[Kgdb-bugreport] kgdb test suite failure

[Alexander B. <a.b...@gm...>]

Hi
I tried to run the latest git kernel and got the following error.

See an attachment for full dmesg.

kgdbts: ERROR PUT: end of test buffer on 'do_fork_test' line 5
expected OK got $E02#a7
------------[ cut here ]------------
WARNING: at drivers/misc/kgdbts.c:721 run_simple_test+0x1de/0x20e()
Modules linked in:
Pid: 6, comm: khelper Not tainted 2.6.26-rc1-00279-g28a4acb #12
[<c011a00a>] warn_on_slowpath+0x41/0x6c
[<c011aa77>] ? vprintk+0x3e7/0x407
[<c0254cf4>] ? number+0x10d/0x1cf
[<c012d3da>] ? sched_clock_cpu+0x70/0x88
[<c011aaac>] ? printk+0x15/0x17
[<c02ae228>] run_simple_test+0x1de/0x20e
[<c02adc15>] kgdbts_put_char+0x14/0x16
[<c013d7ba>] put_packet+0x6b/0xbb
[<c013e8bc>] kgdb_handle_exception+0xa19/0xb21
[<c0119400>] ? do_fork+0x0/0x19e
[<c010e9e3>] kgdb_notify+0x103/0x140
[<c035ac89>] notifier_call_chain+0x2b/0x4a
[<c035accd>] __atomic_notifier_call_chain+0x25/0x36
[<c035acea>] atomic_notifier_call_chain+0xc/0xe
[<c012cd15>] notify_die+0x2d/0x2f
[<c03597fd>] do_int3+0x32/0x6c
[<c0359293>] int3+0x27/0x2c
[<c0119400>] ? do_fork+0x0/0x19e
[<c010176c>] ? kernel_thread+0x73/0x7b
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c0103740>] ? kernel_thread_helper+0x0/0x10
[<c0126236>] __call_usermodehelper+0x33/0x4d
[<c0126686>] run_workqueue+0xba/0x187
[<c012664c>] ? run_workqueue+0x80/0x187
[<c0126203>] ? __call_usermodehelper+0x0/0x4d
[<c0126ea6>] worker_thread+0x80/0x8c
[<c01291bd>] ? autoremove_wake_function+0x0/0x30
[<c0126e26>] ? worker_thread+0x0/0x8c
[<c01290fc>] kthread+0x39/0x61
[<c01290c3>] ? kthread+0x0/0x61
[<c0103747>] kernel_thread_helper+0x7/0x10
=======================
---[ end trace b9faa95810ce9135 ]---
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
 Tx Queue             <0>
 TDH                  <2a>
 TDT                  <2a>
 next_to_use          <2a>
 next_to_clean        <14>
buffer_info[next_to_clean]
 time_stamp           <fffeb89e>
 next_to_watch        <14>
 jiffies              <fffebb63>
 next_to_watch.status <1>
khelper used greatest stack depth: 2516 bytes left
BUG: unable to handle kernel NULL pointer dereference at 00000000
IP: [<00000000>]
*pde = 00000000
Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
kgdbts: BP mismatch 0 expected c0119400
------------[ cut here ]------------
WARNING: at drivers/misc/kgdbts.c:302 check_and_rewind_pc+0x9a/0xb4()
Modules linked in:
Pid: 6, comm: khelper Tainted: G        W 2.6.26-rc1-00279-g28a4acb #12
[<c011a00a>] warn_on_slowpath+0x41/0x6c
[<c011aa77>] ? vprintk+0x3e7/0x407
[<c0119400>] ? do_fork+0x0/0x19e
[<c012d3da>] ? sched_clock_cpu+0x70/0x88
[<c0116d4e>] ? cpu_clock+0x115/0x12c
[<c0119400>] ? do_fork+0x0/0x19e
[<c011aaac>] ? printk+0x15/0x17
[<c0119400>] ? do_fork+0x0/0x19e
[<c02ae96d>] check_and_rewind_pc+0x9a/0xb4
[<c0119400>] ? do_fork+0x0/0x19e
[<c02adb7a>] validate_simple_test+0x22/0x69
[<c02ae1eb>] run_simple_test+0x1a1/0x20e
[<c02adc15>] kgdbts_put_char+0x14/0x16
[<c013d7ba>] put_packet+0x6b/0xbb
[<c013e8bc>] kgdb_handle_exception+0xa19/0xb21
[<c010e9e3>] kgdb_notify+0x103/0x140
[<c035ac89>] notifier_call_chain+0x2b/0x4a
[<c035accd>] __atomic_notifier_call_chain+0x25/0x36
[<c035acea>] atomic_notifier_call_chain+0xc/0xe
[<c012cd15>] notify_die+0x2d/0x2f
[<c0359303>] __die+0x61/0xc6
[<c0103dec>] die+0x87/0x106
[<c035aae1>] do_page_fault+0x4e3/0x59d
[<c035a5fe>] ? do_page_fault+0x0/0x59d
[<c010176c>] ? kernel_thread+0x73/0x7b
[<c0359102>] error_code+0x6a/0x70
[<c010176c>] ? kernel_thread+0x73/0x7b
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c0103740>] ? kernel_thread_helper+0x0/0x10
[<c0126236>] ? __call_usermodehelper+0x33/0x4d
[<c0126686>] ? run_workqueue+0xba/0x187
[<c012664c>] ? run_workqueue+0x80/0x187
[<c0126203>] ? __call_usermodehelper+0x0/0x4d
[<c0126ea6>] ? worker_thread+0x80/0x8c
[<c01291bd>] ? autoremove_wake_function+0x0/0x30
[<c0126e26>] ? worker_thread+0x0/0x8c
[<c01290fc>] ? kthread+0x39/0x61
[<c01290c3>] ? kthread+0x0/0x61
[<c0103747>] ? kernel_thread_helper+0x7/0x10
=======================
---[ end trace b9faa95810ce9135 ]---
kgdbts: ERROR PUT: end of test buffer on 'do_fork_test' line 3
expected do_fork got
$e201000000b0c6f70000000000000000000000006c1710c01141800054bfc6f7Б^A
------------[ cut here ]------------
WARNING: at drivers/misc/kgdbts.c:721 run_simple_test+0x1de/0x20e()
Modules linked in:
Pid: 6, comm: khelper Tainted: G        W 2.6.26-rc1-00279-g28a4acb #12
[<c011a00a>] warn_on_slowpath+0x41/0x6c
[<c011aa77>] ? vprintk+0x3e7/0x407
[<c0119400>] ? do_fork+0x0/0x19e
[<c012d3da>] ? sched_clock_cpu+0x70/0x88
[<c0116d4e>] ? cpu_clock+0x115/0x12c
[<c0119400>] ? do_fork+0x0/0x19e
[<c011aaac>] ? printk+0x15/0x17
[<c011aaac>] ? printk+0x15/0x17
[<c02ae228>] run_simple_test+0x1de/0x20e
[<c02adc15>] kgdbts_put_char+0x14/0x16
[<c013d7ba>] put_packet+0x6b/0xbb
[<c013e8bc>] kgdb_handle_exception+0xa19/0xb21
[<c010e9e3>] kgdb_notify+0x103/0x140
[<c035ac89>] notifier_call_chain+0x2b/0x4a
[<c035accd>] __atomic_notifier_call_chain+0x25/0x36
[<c035acea>] atomic_notifier_call_chain+0xc/0xe
[<c012cd15>] notify_die+0x2d/0x2f
[<c0359303>] __die+0x61/0xc6
[<c0103dec>] die+0x87/0x106
[<c035aae1>] do_page_fault+0x4e3/0x59d
[<c035a5fe>] ? do_page_fault+0x0/0x59d
[<c010176c>] ? kernel_thread+0x73/0x7b
[<c0359102>] error_code+0x6a/0x70
[<c010176c>] ? kernel_thread+0x73/0x7b
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c01263d1>] ? ____call_usermodehelper+0x0/0xe7
[<c0103740>] ? kernel_thread_helper+0x0/0x10
[<c0126236>] ? __call_usermodehelper+0x33/0x4d
[<c0126686>] ? run_workqueue+0xba/0x187
[<c012664c>] ? run_workqueue+0x80/0x187
[<c0126203>] ? __call_usermodehelper+0x0/0x4d
[<c0126ea6>] ? worker_thread+0x80/0x8c
[<c01291bd>] ? autoremove_wake_function+0x0/0x30
[<c0126e26>] ? worker_thread+0x0/0x8c
[<c01290fc>] ? kthread+0x39/0x61
[<c01290c3>] ? kthread+0x0/0x61
[<c0103747>] ? kernel_thread_helper+0x7/0x10
=======================
---[ end trace b9faa95810ce9135 ]---