lkml.org 
[lkml]   [2001]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject2.4.4-ac4 - oops on unload "cdrom" module
Hello!

This oops happens when I run "rmmod cdrom" on a 2.4.4-ac4 kernel with
CONFIG_SYSCTL enabled. It doesn't happen if CONFIG_SYSCTL is disabled.

Full .config is here:
http://www.red-bean.com/~proski/linux/config

sr_mod isn't loaded at this point. Reference to sd_mod looks weird. After
this oops the "cdrom" module remains in memory in the "deleted" state.

$ /sbin/lsmod
Module Size Used by
hid 11760 0 (unused)
keybdev 1632 0 (unused)
mga 85312 1
agpgart 13136 3
mousedev 3936 1 (autoclean)
input 3296 0 (autoclean) [hid keybdev mousedev]
nfsd 67504 8 (autoclean)
lockd 48752 1 (autoclean) [nfsd]
sunrpc 56800 1 (autoclean) [nfsd lockd]
3c59x 24320 1 (autoclean)
ipx 14496 1 (autoclean)
ramfs 3728 1 (autoclean)
cdrom 28864 0 (deleted)

ksymoops 2.3.4 on i686 2.4.4-ac4. Options used
-v vmlinux (specified)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.4-ac4/ (default)
-m System.map (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000008
c0118051
Oops: 0000
CPU: 0
EIP: 0010:[<c0118051>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: d08c9000 edx: 00000000
esi: d08c9000 edi: 00000000 ebp: bfffe968 esp: c181bf80
ds: 0018 es: 0018 ss: 0018
Process rmmod (pid: 11303, stackpage=c181b000)
Stack: d08c9000 d08cd92f 00000000 d08cd97a 00000000 d08cf5c0 c01157eb d08c9000
fffffff0 c62dc000 c0114c87 d08c9000 00000000 c181a000 bffffb47 00000001
c0106af7 bffffb47 0805eee8 00000100 bffffb47 00000001 bfffe968 00000081
Call Trace: [<d08c9000>] [<d08cd92f>] [<d08cd97a>] [<d08cf5c0>] [<c01157eb>]
[<d08c9000>] [<c0114c87>] [<d08c9000>] [<c0106af7>]
Code: 8b 53 08 8b 43 04 89 50 04 89 02 a1 a0 46 27 c0 50 8b 03 50

>>EIP; c0118051 <unregister_sysctl_table+5/2c> <=====
Trace; d08c9000 <[sd_mod]__module_using_checksums+18cb/192b>
Trace; d08cd92f <[cdrom]cdrom_sysctl_unregister+b/10>
Trace; d08cd97a <[cdrom]cdrom_exit+1a/28>
Trace; d08cf5c0 <[cdrom].rodata.start+1a00/1a22>
Trace; c01157eb <free_module+1b/a0>
Trace; d08c9000 <[sd_mod]__module_using_checksums+18cb/192b>
Trace; c0114c87 <sys_delete_module+f3/1b0>
Trace; d08c9000 <[sd_mod]__module_using_checksums+18cb/192b>
Trace; c0106af7 <system_call+33/38>
Code; c0118051 <unregister_sysctl_table+5/2c>
00000000 <_EIP>:
Code; c0118051 <unregister_sysctl_table+5/2c> <=====
0: 8b 53 08 mov 0x8(%ebx),%edx <=====
Code; c0118054 <unregister_sysctl_table+8/2c>
3: 8b 43 04 mov 0x4(%ebx),%eax
Code; c0118057 <unregister_sysctl_table+b/2c>
6: 89 50 04 mov %edx,0x4(%eax)
Code; c011805a <unregister_sysctl_table+e/2c>
9: 89 02 mov %eax,(%edx)
Code; c011805c <unregister_sysctl_table+10/2c>
b: a1 a0 46 27 c0 mov 0xc02746a0,%eax
Code; c0118061 <unregister_sysctl_table+15/2c>
10: 50 push %eax
Code; c0118062 <unregister_sysctl_table+16/2c>
11: 8b 03 mov (%ebx),%eax
Code; c0118064 <unregister_sysctl_table+18/2c>
13: 50 push %eax


--
Regards,
Pavel Roskin

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.025 / U:0.520 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site