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SubjectRe: OOPS: USB and/or devicefs
From
Date
On Sun, 2002-08-25 at 15:22, Patrick Mochel wrote:
>
> A dentry has been created with no inode associated with it, and
> driverfs_unlink() attempts to access it without checking it.
>
> Could you please try the attached patch and let me know if it helps?
>
> Thanks,
>
> -pat

No help.

The first oops occurred immediately when the hub was unplugged (I was on
a console this time, not X, so I could see the oops live).

The second oops was caused by execing "ls" in
/devices/root/pci0/00:08.0/usb_bus

Both appear to be caused by slab poisoning.

(btw, this isn't straight 2.5.31, it is the BK tree as of about 15:25
PST yesterday)

ksymoops 2.4.4 on i586 2.5.31. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.5.31/ (default)
-m /boot/System.map-2.5.31 (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

Aug 25 15:42:48 entropy kernel: Unable to handle kernel paging request at virtual address 5a5a5a5e
Aug 25 15:42:48 entropy kernel: c0146d79
Aug 25 15:42:48 entropy kernel: *pde = 00000000
Aug 25 15:42:48 entropy kernel: Oops: 0002
Aug 25 15:42:48 entropy kernel: CPU: 0
Aug 25 15:42:48 entropy kernel: EIP: 0060:[<c0146d79>] Not tainted
Aug 25 15:42:48 entropy kernel: EFLAGS: 00010206
Aug 25 15:42:48 entropy kernel: eax: c49b47f4 ebx: c49b47e4 ecx: 5a5a5a5a edx: 5a5a5a5a
Aug 25 15:42:48 entropy kernel: esi: c1bb0314 edi: c49b47e4 ebp: c49b4c20 esp: c4843ed4
Aug 25 15:42:48 entropy kernel: ds: 0068 es: 0068 ss: 0068
Aug 25 15:42:48 entropy kernel: Stack: 00000286 00070fd0 00000282 c10cb280 c1bb0370 c1bb0314 c015b43b c49b47e4
Aug 25 15:42:48 entropy kernel: c49b47e4 c49b4c8c c49b4bf8 c015bc0f c1b63a44 c49b47e4 c4b824d0 c4b82610
Aug 25 15:42:48 entropy kernel: ffffffff c4b82400 c016d920 c4b82568 c4b824d0 c4b824d0 c4b82400 c581616a
Aug 25 15:42:48 entropy kernel: Call Trace: [<c015b43b>] [<c015bc0f>] [<c016d920>] [<c581616a>] [<c5817edf>]
Aug 25 15:42:48 entropy kernel: [<c58181df>] [<c58233ee>] [<c5818360>] [<c581838b>] [<c5818360>] [<c0110820>]
Aug 25 15:42:48 entropy kernel: [<c01055a5>]
Aug 25 15:42:48 entropy kernel: Code: 89 4a 04 89 11 c7 43 10 00 00 00 00 c7 40 04 00 00 00 00 89

>>EIP; c0146d79 <d_delete+59/80> <=====
Trace; c015b43b <driverfs_unlink+3b/50>
Trace; c015bc0f <driverfs_remove_dir+4f/a1>
Trace; c016d920 <put_device+80/b0>
Trace; c581616a <[usbcore]usb_disconnect+ea/110>
Trace; c5817edf <[usbcore]usb_hub_port_connect_change+4f/250>
Trace; c58181df <[usbcore]usb_hub_events+ff/280>
Trace; c58233ee <[usbcore].rodata.end+3673/8125>
Trace; c5818360 <[usbcore]usb_hub_thread+0/e0>
Trace; c581838b <[usbcore]usb_hub_thread+2b/e0>
Trace; c5818360 <[usbcore]usb_hub_thread+0/e0>
Trace; c0110820 <default_wake_function+0/40>
Trace; c01055a5 <kernel_thread_helper+5/10>
Code; c0146d79 <d_delete+59/80>
00000000 <_EIP>:
Code; c0146d79 <d_delete+59/80> <=====
0: 89 4a 04 mov %ecx,0x4(%edx) <=====
Code; c0146d7c <d_delete+5c/80>
3: 89 11 mov %edx,(%ecx)
Code; c0146d7e <d_delete+5e/80>
5: c7 43 10 00 00 00 00 movl $0x0,0x10(%ebx)
Code; c0146d85 <d_delete+65/80>
c: c7 40 04 00 00 00 00 movl $0x0,0x4(%eax)
Code; c0146d8c <d_delete+6c/80>
13: 89 00 mov %eax,(%eax)

Aug 25 15:43:08 entropy kernel: <1>Unable to handle kernel paging request at virtual address 5a5a5aca
Aug 25 15:43:08 entropy kernel: c013e6ef
Aug 25 15:43:08 entropy kernel: *pde = 00000000
Aug 25 15:43:08 entropy kernel: Oops: 0000
Aug 25 15:43:08 entropy kernel: CPU: 0
Aug 25 15:43:08 entropy kernel: EIP: 0060:[<c013e6ef>] Not tainted
Aug 25 15:43:08 entropy kernel: EFLAGS: 00010246
Aug 25 15:43:08 entropy kernel: eax: c4b40080 ebx: 00000003 ecx: c1bfbf70 edx: c1bfbed4
Aug 25 15:43:08 entropy kernel: esi: 00000003 edi: c1bfbf70 ebp: 5a5a5a5a esp: c1bfbec0
Aug 25 15:43:08 entropy kernel: ds: 0068 es: 0068 ss: 0068
Aug 25 15:43:08 entropy kernel: Stack: c1bfbed4 00000003 c474c000 c10dd368 c488ef44 00000000 00000000 00000000
Aug 25 15:43:08 entropy kernel: 0000201b 00000a03 00002503 0000201b 00000003 c1bfbf60 c0122c8d c474c005
Aug 25 15:43:08 entropy kernel: 00000004 01b42f73 c1d061c8 00000003 00000003 c1bfbf70 00018801 c013f6ec
Aug 25 15:43:08 entropy kernel: Call Trace: [<c0122c8d>] [<c013f6ec>] [<c010f190>] [<c010757d>] [<c01343d4>]
Aug 25 15:43:08 entropy kernel: [<c0134755>] [<c0107347>]
Aug 25 15:43:08 entropy kernel: Code: 8b 45 70 89 14 24 eb 09 8b 45 70 8d b6 00 00 00 00 66 8b 5d

>>EIP; c013e6ef <link_path_walk+6f/880> <=====
Trace; c0122c8d <vm_enough_memory+2d/c0>
Trace; c013f6ec <open_namei+7c/3d0>
Trace; c010f190 <do_page_fault+0/48f>
Trace; c010757d <error_code+2d/40>
Trace; c01343d4 <filp_open+34/60>
Trace; c0134755 <sys_open+35/70>
Trace; c0107347 <syscall_call+7/b>
Code; c013e6ef <link_path_walk+6f/880>
00000000 <_EIP>:
Code; c013e6ef <link_path_walk+6f/880> <=====
0: 8b 45 70 mov 0x70(%ebp),%eax <=====
Code; c013e6f2 <link_path_walk+72/880>
3: 89 14 24 mov %edx,(%esp,1)
Code; c013e6f5 <link_path_walk+75/880>
6: eb 09 jmp 11 <_EIP+0x11> c013e700 <link_path_walk+80/880>
Code; c013e6f7 <link_path_walk+77/880>
8: 8b 45 70 mov 0x70(%ebp),%eax
Code; c013e6fa <link_path_walk+7a/880>
b: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
Code; c013e700 <link_path_walk+80/880>
11: 66 8b 5d 00 mov 0x0(%ebp),%bx



1 warning issued. Results may not be reliable.

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