koops on multiple access to parallel port scanner

[Jan Ischebeck]

Binary package hint: linux-image-2.6.24-8-generic

A HP OfficeJet T65 is connected to the computer.
I started XSane and QuiteInSane shortly afterward. (Both running in parallel)
Then I triggered the Hardwarescan of QuiteInSane again.
The following kernel oops was created.

[ 1576.712764] sysctl table check failed: /dev/parport/parport0/devices/ppdev0/timeslice Sysctl already exists
[ 1576.712781] Pid: 7365, comm: quiteinsane Tainted: P 2.6.24-8-generic #1
[ 1576.712806] [<c01467e5>] set_fail+0x45/0x60
[ 1576.712823] [<c0146a96>] sysctl_check_table+0x296/0x5b0
[ 1576.712829] [<c0134eb8>] sysctl_head_finish+0x18/0x30
[ 1576.712844] [<c0146aaa>] sysctl_check_table+0x2aa/0x5b0
[ 1576.712848] [<c0134eb8>] sysctl_head_finish+0x18/0x30
[ 1576.712863] [<c0146aaa>] sysctl_check_table+0x2aa/0x5b0
[ 1576.712866] [<c0134eb8>] sysctl_head_finish+0x18/0x30
[ 1576.712881] [<c0146aaa>] sysctl_check_table+0x2aa/0x5b0
[ 1576.712884] [<c0134eb8>] sysctl_head_finish+0x18/0x30
[ 1576.712898] [<c0146aaa>] sysctl_check_table+0x2aa/0x5b0
[ 1576.712902] [<c0134eb8>] sysctl_head_finish+0x18/0x30
[ 1576.712916] [<c0146aaa>] sysctl_check_table+0x2aa/0x5b0
[ 1576.712920] [<c0133a39>] sysctl_set_parent+0x19/0x30
[ 1576.712937] [<c0135260>] register_sysctl_table+0x50/0xa0
[ 1576.712944] [<f8a1090e>] parport_device_proc_register+0xae/0xe0 [parport]
[ 1576.712963] [<f8a0ee29>] parport_register_device+0x139/0x260 [parport]
[ 1576.712984] [<f8dd7765>] pp_ioctl+0x445/0x830 [ppdev]
[ 1576.712992] [<f8dd7240>] pp_irq+0x0/0x50 [ppdev]
[ 1576.713011] [<c019a498>] do_ioctl+0x78/0x90
[ 1576.713022] [<c019a6de>] vfs_ioctl+0x22e/0x2b0
[ 1576.713027] [<c018c56e>] do_sys_open+0xbe/0xe0
[ 1576.713038] [<c019a7b6>] sys_ioctl+0x56/0x70
[ 1576.713047] [<c01053c2>] sysenter_past_esp+0x6b/0xa9
[ 1576.713075] =======================
[ 1576.713079] ppdev0: registered pardevice
[ 1576.721171] ppdev0: unregistered pardevice

! No Error was detected by APORT

System: Ubuntu Hardy of 19-Feb-08

[Leann Ogasawara (leannogasawara)]

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

[Launchpad Janitor (janitor)]

Per a decision made by the Ubuntu Kernel Team, bugs will longer be assigned to the ubuntu-kernel-team in Launchpad as part of the bug triage process. The ubuntu-kernel-team is being unassigned from this bug report. Refer to https://wiki.ubuntu.com/KernelTeamBugPolicies for more information. Thanks.

[Leann Ogasawara (leannogasawara)]

This bug was noted as fixed in the upstream bug report with the following patch that has already been included in Karmic. Marking bug Fix Released.

ogasawara@yoji:~/ubuntu-karmic$ git log 05ad709d04799125ed85dd816fdb558258102172

commit 05ad709d04799125ed85dd816fdb558258102172

Author: Alan Cox <email address hidden>

Date: Tue Jun 2 16:58:10 2009 +0100

    parport: quickfix the proc registration bug

    Ideally we should have a directory of drivers and a link to the 'active'

    driver. For now just show the first device which is effectively the existing

    semantics without a warning.

    This is an update on the original buggy patch that I then forgot to

    resubmit. Confusingly it was proposed by Red Hat, written by Etched Pixels

    fixed and submitted by Intel ...

    Resolves-Bug: http://bugzilla.kernel.org/show_bug.cgi?id=9749

    Signed-off-by: Alan Cox <email address hidden>

    Signed-off-by: Linus Torvalds <email address hidden>