Bug 156908 - strace -f kmodule -d panics kernel
strace -f kmodule -d panics kernel
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
: 156045 157141 (view as bug list)
Depends On:
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Reported: 2005-05-05 00:44 EDT by Alexandre Oliva
Modified: 2015-01-04 17:19 EST (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-09-04 18:58:18 EDT
Type: ---
Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
patch posted to lkml that allegedly fixes the problem (3.47 KB, patch)
2005-05-05 15:36 EDT, Alexandre Oliva
no flags Details | Diff

  None (edit)
Description Alexandre Oliva 2005-05-05 00:44:32 EDT
If you run:

root# strace -f kmodule -d 

on kernel 2.6.11-1.1284_FC4 (UP i686), the output will end with something like:

clone(Process 4326 attached
child_tidptr=0xb7fcb708) = 4326
[pid  4320] exit_group(0)               = ?

and the box may freeze, after leaving the following trail in /var/log/messages:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: nfsd exportfs lockd parport_pc
lp parport autofs4 i2c_dev i2c_core rfcomm l2cap bluetooth tun sunrpc pcmcia
ipt_REJECT ipt_LOG ipt_state iptable_filter iptable_nat ip_conntrack
iptable_mangle ip_tables video button battery ac md5 ipv6 yenta_socket
rsrc_nonstatic pcmcia_core snd_maestro3 snd_ac97_codec snd_seq_dummy snd_seq_oss
snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm
snd_timer snd_page_alloc snd soundcore e100 mii floppy dm_snapshot dm_zero
dm_mirror ext3 jbd dm_mod usb_storage uhci_hcd sbp2 ohci1394 ieee1394 sd_mod
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00010286   (2.6.11-1.1284_FC4)
EIP is at _stext+0x3feffdd8/0x8
eax: d42ee000   ebx: 01200011   ecx: 00000000   edx: 00000000
esi: d3b01000   edi: d46b0bc4   ebp: d42ee000   esp: d42eefc4
ds: 007b   es: 007b   ss: 0068
Process kmodule (pid: 4326, threadinfo=d42ee000 task=d3b01000)
Stack: 01202011 00000000 00000000 00000000 b7fcb708 bfbec4cc 00000000 c010007b
       c010007b 00000078 00fd3402 00000073 00000282 bfbec474 0000007b
Call Trace:
Code:  Bad EIP value.
 <0>Fatal exception: panic in 5 seconds
Comment 1 Alexandre Oliva 2005-05-05 15:36:14 EDT
Created attachment 114066 [details]
patch posted to lkml that allegedly fixes the problem

As luck would have it, Krzysztof Halasa <khc@pm.waw.pl> ran into the same
problem earlier today and posted about it to lkml.  Alexander Nyberg
<alexn@telia.com> posted the attached e-mail containing a patch, and Krzysztof
confirmed it fixed the bug.
Comment 2 Roland McGrath 2005-05-09 04:08:27 EDT
*** Bug 156045 has been marked as a duplicate of this bug. ***
Comment 3 Dave Jones 2005-05-10 16:17:17 EDT
this patch is included in -rc4, so 1290 and above should have it.
(you can grab it early from http://people.redhat.com/davej/kernels/Fedora/FC4)

it'll be in tomorrows rawhide
Comment 4 Dave Jones 2005-05-10 17:27:22 EDT
*** Bug 157141 has been marked as a duplicate of this bug. ***

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