Bug 25122 - Kernel hangs: Internal error: Oops: 17 [#1] PREEMPT
Summary: Kernel hangs: Internal error: Oops: 17 [#1] PREEMPT
Status: CLOSED PATCH_ALREADY_AVAILABLE
Alias: None
Product: Other
Classification: Unclassified
Component: Modules (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: other_modules
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-12-17 18:55 UTC by vorxio
Modified: 2020-10-17 03:33 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.35.7
Subsystem:
Regression: No
Bisected commit-id:

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Description vorxio 2010-12-17 18:55:33 UTC 
Kernel: 2.6.35.7
Linux: Ubuntu 9.04
Hardware: Sheeva Plug + External Hub + USB Internet Key Onda MT503HSA

The USB Internet key creates 4 ttyUSB ports ttyUSB1, ttyUSB2, ttyUSB3, ttyUSB4
/dev/ttyUSB2 is the control port (which accepts AT commands)

My app launches a shell script that starts pppd

ppdd call /dev/ttyUSB2 mypeer

***SOMETIMES*** the kernel hangs with the following dump on the terminal:

Unable to handle kernel NULL pointer dereference at virtual address 000000ec
pgd = c0004000
[000000ec] *pgd=00000000
Internal error: Oops: 17 [#1] PREEMPT
last sysfs file: /sys/module/ppp_generic/initstate
Modules linked in: ppp_deflate bsd_comp ppp_async ppp_generic slhc ipv6 dm_crypt dm_mod option usb_wwan ftdi_sio hmac usbserial sha1_generic mv_cesa
CPU: 0    Not tainted  (2.6.35.7 #5)
PC is at tty_buffer_request_room+0x20/0x148
LR is at tty_buffer_request_room+0x20/0x148
pc : [<c0230700>]    lr : [<c0230700>]    psr: 80000093
sp : dfc47d48  ip : c0428480  fp : df78d380
r10: 80000093  r9 : 00000000  r8 : df765000
r7 : 00000000  r6 : 0000000e  r5 : 00000000  r4 : 00000000
r3 : dfc46000  r2 : 00000000  r1 : 00010002  r0 : 00000003
Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 0005397f  Table: 1f7b4000  DAC: 00000017
Process events/0 (pid: 5, stack limit = 0xdfc46270)
Stack: (0xdfc47d48 to 0xdfc48000)
7d40:                   0000000e df765000 00000000 deca7800 00000000 df765000
7d60: 0000000e c0230990 df5c8980 00000000 deca7800 00000000 df765000 ffc004e0
7d80: df4f64fc bf03e890 df5c8980 df4f6400 df5c8980 00000000 df4f6400 8ff28d00
7da0: df5c8280 c02b84c4 df5c8980 00000000 df4f6400 c02c7078 ffc010c0 ffc01a80
7dc0: ffffff8d c02c7148 00000001 00000001 df78d38c 00000003 ffc01b18 ffc015a0
7de0: 00000021 df78d380 df4f64fc 00000000 0000c0a9 00010039 dfc46000 dee5d780
7e00: dfc47f0c c02c860c df4f64fc df4f6400 00000021 c02cb19c c04171e4 df4f6400
7e20: 40000093 00000000 00000013 00000001 dfc46000 dee5d780 dfc47f0c c02b7eb0
7e40: 00000000 df47fa80 00000000 c006b310 00000000 c052a73c 00000013 df47fa80
7e60: 00000002 c006d568 00000013 00000000 0000000c c002b06c 30000013 ffffffff
7e80: fee20200 c03e7988 1edb0000 00000c00 c03e593c c0000000 dfc36d80 dfc46000
7ea0: df5ba300 c02b9cc0 dfd9c000 00000000 dee5d780 dfc47f0c 40000c00 dfc47ed0
7ec0: c0033ee8 c0033bf0 30000013 ffffffff 35344034 00000289 3534e890 00000289
7ee0: 0000a85c 00000000 00000007 df5c8500 dfc47f14 dfc36d80 df5c8508 dfc46000
7f00: 00000000 00000000 00000001 c02b9cc0 00000000 00000000 dfc36d80 c00532cc
7f20: c0542fe8 c0542fe8 dfc47f54 df7d76c0 00000004 df658a80 00000000 bf03e9d0
7f40: deca7804 deca7834 40000013 bf00902c bf00c9c4 c0230bec df7b250c df7b2400
7f60: 40000013 c02292e4 60000093 00000000 dfc005c0 dfc005c0 dfc46000 dfc005c8
7f80: c0228f2c df7b2510 00000000 df7b250c 00000000 c004fb6c dfc39f6c 00000000
7fa0: dfc36d80 c00532cc dfc47fa8 dfc47fa8 dfc47fd4 dfc39f60 dfc47fd4 c004f9ec
7fc0: dfc005c0 00000000 00000000 c0052f98 00000000 00000000 dfc47fd8 dfc47fd8
7fe0: 00000000 dfc39f60 c0052f20 c002c3f0 00000013 c002c3f0 84428434 961219db
[<c0230700>] (tty_buffer_request_room+0x20/0x148) from [<c0230990>] (tty_insert_flip_string_fixed_flag+0x2c/0x8c)
[<c0230990>] (tty_insert_flip_string_fixed_flag+0x2c/0x8c) from [<bf03e890>] (usb_wwan_indat_callback+0x9c/0x13c [usb_wwan])
[<bf03e890>] (usb_wwan_indat_callback+0x9c/0x13c [usb_wwan]) from [<c02b84c4>] (usb_hcd_giveback_urb+0x70/0xbc)
[<c02b84c4>] (usb_hcd_giveback_urb+0x70/0xbc) from [<c02c7078>] (ehci_urb_done+0xa8/0xb4)
[<c02c7078>] (ehci_urb_done+0xa8/0xb4) from [<c02c7148>] (qh_completions+0xc4/0x42c)
[<c02c7148>] (qh_completions+0xc4/0x42c) from [<c02c860c>] (end_unlink_async+0x5c/0xec)
[<c02c860c>] (end_unlink_async+0x5c/0xec) from [<c02cb19c>] (ehci_irq+0x90/0x1f8)
[<c02cb19c>] (ehci_irq+0x90/0x1f8) from [<c02b7eb0>] (usb_hcd_irq+0x3c/0x98)
[<c02b7eb0>] (usb_hcd_irq+0x3c/0x98) from [<c006b310>] (handle_IRQ_event+0x24/0xf4)
[<c006b310>] (handle_IRQ_event+0x24/0xf4) from [<c006d568>] (handle_level_irq+0xd4/0x16c)
[<c006d568>] (handle_level_irq+0xd4/0x16c) from [<c002b06c>] (asm_do_IRQ+0x6c/0x8c)
[<c002b06c>] (asm_do_IRQ+0x6c/0x8c) from [<c03e7988>] (__irq_svc+0x48/0xa8)
Exception stack(0xdfc47e88 to 0xdfc47ed0)
7e80:                   1edb0000 00000c00 c03e593c c0000000 dfc36d80 dfc46000
7ea0: df5ba300 c02b9cc0 dfd9c000 00000000 dee5d780 dfc47f0c 40000c00 dfc47ed0
7ec0: c0033ee8 c0033bf0 30000013 ffffffff
[<c03e7988>] (__irq_svc+0x48/0xa8) from [<c0033bf0>] (__flush_whole_cache+0xc/0x3c)
[<c0033bf0>] (__flush_whole_cache+0xc/0x3c) from [<df5c8500>] (0xdf5c8500)
Code: e38a3080 e121f003 e3a00001 eb06e4bc (e59450ec)
---[ end trace 69ff1a7d6bd874eb ]---
Kernel panic - not syncing: Fatal exception in interrupt
[<c00304fc>] (unwind_backtrace+0x0/0xec) from [<c03e5390>] (panic+0x5c/0xe4)
[<c03e5390>] (panic+0x5c/0xe4) from [<c002ed1c>] (die+0x1b0/0x1f0)
[<c002ed1c>] (die+0x1b0/0x1f0) from [<c0031234>] (__do_kernel_fault+0x64/0x84)
[<c0031234>] (__do_kernel_fault+0x64/0x84) from [<c03e9874>] (do_page_fault+0x304/0x328)
[<c03e9874>] (do_page_fault+0x304/0x328) from [<c002b2f8>] (do_DataAbort+0x34/0x94)
[<c002b2f8>] (do_DataAbort+0x34/0x94) from [<c03e792c>] (__dabt_svc+0x4c/0x60)
Exception stack(0xdfc47d00 to 0xdfc47d48)
7d00: 00000003 00010002 00000000 dfc46000 00000000 00000000 0000000e 00000000
7d20: df765000 00000000 80000093 df78d380 c0428480 dfc47d48 c0230700 c0230700
7d40: 80000093 ffffffff
[<c03e792c>] (__dabt_svc+0x4c/0x60) from [<c0230700>] (tty_buffer_request_room+0x20/0x148)
[<c0230700>] (tty_buffer_request_room+0x20/0x148) from [<c0230990>] (tty_insert_flip_string_fixed_flag+0x2c/0x8c)
[<c0230990>] (tty_insert_flip_string_fixed_flag+0x2c/0x8c) from [<bf03e890>] (usb_wwan_indat_callback+0x9c/0x13c [usb_wwan])
[<bf03e890>] (usb_wwan_indat_callback+0x9c/0x13c [usb_wwan]) from [<c02b84c4>] (usb_hcd_giveback_urb+0x70/0xbc)
[<c02b84c4>] (usb_hcd_giveback_urb+0x70/0xbc) from [<c02c7078>] (ehci_urb_done+0xa8/0xb4)
[<c02c7078>] (ehci_urb_done+0xa8/0xb4) from [<c02c7148>] (qh_completions+0xc4/0x42c)
[<c02c7148>] (qh_completions+0xc4/0x42c) from [<c02c860c>] (end_unlink_async+0x5c/0xec)
[<c02c860c>] (end_unlink_async+0x5c/0xec) from [<c02cb19c>] (ehci_irq+0x90/0x1f8)
[<c02cb19c>] (ehci_irq+0x90/0x1f8) from [<c02b7eb0>] (usb_hcd_irq+0x3c/0x98)
[<c02b7eb0>] (usb_hcd_irq+0x3c/0x98) from [<c006b310>] (handle_IRQ_event+0x24/0xf4)
[<c006b310>] (handle_IRQ_event+0x24/0xf4) from [<c006d568>] (handle_level_irq+0xd4/0x16c)
[<c006d568>] (handle_level_irq+0xd4/0x16c) from [<c002b06c>] (asm_do_IRQ+0x6c/0x8c)
[<c002b06c>] (asm_do_IRQ+0x6c/0x8c) from [<c03e7988>] (__irq_svc+0x48/0xa8)
Exception stack(0xdfc47e88 to 0xdfc47ed0)
7e80:                   1edb0000 00000c00 c03e593c c0000000 dfc36d80 dfc46000
7ea0: df5ba300 c02b9cc0 dfd9c000 00000000 dee5d780 dfc47f0c 40000c00 dfc47ed0
7ec0: c0033ee8 c0033bf0 30000013 ffffffff
[<c03e7988>] (__irq_svc+0x48/0xa8) from [<c0033bf0>] (__flush_whole_cache+0xc/0x3c)
[<c0033bf0>] (__flush_whole_cache+0xc/0x3c) from [<df5c8500>] (0xdf5c8500)


I don't really know where the bug is (and I don't really know if this is a kernel or module bug) ... however I hope this will help you to fix it.

If you need more details let me know.

Thank you in advance,
  Vor
Comment 1 Alan 2012-05-12 15:39:17 UTC 
Should be fixed in modern kernels, if not re-open
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