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SubjectRe: 2.6.14-rc2-mm2 (NULL pointer)
Date
On Thursday 29 September 2005 23:37, Andrew Morton wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.14-rc2/2.
>6.14-rc2-mm2/

hi,
I'm not sure if this error depends on the loaded quickcam module, which isn't
in standard kernels.
Here is the dmesg output, hth.

usb 1-2.3: USB disconnect, address 7
Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
<ffffffff801ba567>{sysfs_remove_group+23}
PGD 320e0067 PUD 320d9067 PMD 0
Oops: 0000 [1] PREEMPT SMP
CPU 0
Modules linked in: video quickcam nls_cp437 vfat fat ppp_deflate zlib_deflate
bsd_comp ppp_async radeonfb r8169 snd_bt87x
Pid: 11, comm: khubd Not tainted 2.6.14-rc2-mm2 #17
RIP: 0010:[<ffffffff801ba567>] <ffffffff801ba567>{sysfs_remove_group+23}
RSP: 0018:ffff81003fd85d18 EFLAGS: 00010286
RAX: 0000000000000001 RBX: ffff8100297e1e50 RCX: 0000000000000000
RDX: ffff810019339118 RSI: 0000000000000000 RDI: ffff81002a28e7e0
RBP: ffff81003fd85d38 R08: 0000000000000000 R09: ffff81003f881640
R10: 0000000000000000 R11: 0000000000010207 R12: 0000000000000000
R13: ffff81002a28e7e0 R14: ffff81002a28e690 R15: ffff81003f8c4918
FS: 00002aaaad71d520(0000) GS:ffffffff8067e800(0000) knlGS:0000000056114840
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000320a3000 CR4: 00000000000006e0
Process khubd (pid: 11, threadinfo ffff81003fd84000, task ffff81003fe380a0)
Stack: ffff810027911968 ffff8100297e1e50 0000000000000000 ffff81002a28e7e0
ffff81003fd85d58 ffffffff80240996 ffff81002f14b438 0000000000000001
ffff81003fd85d88 ffffffff8024137d
Call Trace:<ffffffff80240996>{usb_remove_ep_files+22}
<ffffffff8024137d>{usb_remove_sysfs_intf_files+61}
<ffffffff8023e274>{usb_disable_device+132}
<ffffffff80238bfe>{usb_disconnect+190}
<ffffffff8023a1d3>{hub_thread+963}
<ffffffff80421c6f>{thread_return+203}
<ffffffff8014c1e0>{autoremove_wake_function+0}
<ffffffff80130120>{__wake_up_common+64}
<ffffffff8014c1e0>{autoremove_wake_function+0}
<ffffffff80239e10>{hub_thread+0}
<ffffffff8014ba9b>{kthread+219} <ffffffff8010ef62>{child_rip+8}
<ffffffff8014b9c0>{kthread+0} <ffffffff8010ef5a>{child_rip+0}

Code: 48 8b 1e 49 89 fd 48 85 db 74 1e 48 89 df e8 16 7b 06 00 49
RIP <ffffffff801ba567>{sysfs_remove_group+23} RSP <ffff81003fd85d18>
CR2: 0000000000000000

dominik
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