Public bug reported:
Binary package hint: linux-image-2.6.22-14-server
Following this procedure will lead to reproducably to a kernel NULL
pointer dereference:
- Install an Adaptec SCSI RAID Controller (2100S, 3000S, 3200S,..)
- In my case I created a RAID1 of 2 disks
- Install Ubuntu Hardy Server Edition
(I did apt-get update and apt-get upgrade)
- Login, sudo modprobe i2o_scsi and i2o_proc
- As a user, cd /proc/i2o/iop0:
[EMAIL PROTECTED]:/proc/i2o/iop0$ cat *
cat: 000: Is a directory
cat: 008: Is a directory
cat: 013: Is a directory
cat: 030: Is a directory
cat: 031: Is a directory
cat: 032: Is a directory
cat: 033: Is a directory
cat: 034: Is a directory
cat: 040: Is a directory
cat: 041: Is a directory
cat: 045: Is a directory
cat: 201: Is a directory
cat: 202: Is a directory
cat: 203: Is a directory
cat: 204: Is a directory
cat: 205: Is a directory
Segmentation fault
After this segmentation fault this scrolls on the local console:
[ 1117.827525] BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000024
[ 1117.827643] printing eip:
[ 1117.827688] f886cc27
[ 1117.827693] *pdpt = 0000000035b30001
[ 1117.827740] *pde = 0000000000000000
[ 1117.827792] Oops: 0000 [#1]
[ 1117.827837] SMP
[ 1117.827958] Modules linked in: i2o_proc sg sd_mod i2o_scsi lp loop
snd_via82xx gameport snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm
snd_page_alloc snd_mpu401_uart snd_seq_dummy snd_seq_oss snd_seq_midi
snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device ide_cd cdrom
snd psmouse via_agp ata_generic agpgart i2c_viapro via686a serio_raw libata
pcspkr i2c_isa soundcore i2c_core parport_pc parport shpchp pci_hotplug ipv6
evdev ext3 jbd mbcache i2o_block scsi_mod floppy via82cxxx ide_core i2o_core
3c59x mii thermal processor fan fuse apparmor commoncap
[ 1117.830393] CPU: 1
[ 1117.830395] EIP: 0060:[<f886cc27>] Not tainted VLI
[ 1117.830399] EFLAGS: 00010296 (2.6.22-14-server #1)
[ 1117.830562] EIP is at i2o_parm_issue+0x27/0x260 [i2o_core]
[ 1117.830612] eax: 00000000 ebx: 0000000c ecx: f79f8f50 edx: 00000006
[ 1117.830663] esi: 00000000 edi: f79f8f5a ebp: 000000bc esp: f7b47e84
[ 1117.830714] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
[ 1117.830766] Process cat (pid: 4944, ti=f7b46000 task=f7b014c0
task.ti=f7b46000)
[ 1117.830815] Stack: f7b47f30 f882b18f f79f8f50 00000006 00000000 0000000c
f5acc700 000000d0
[ 1117.831205] 00000400 00000286 00008001 0000000c 00000000 f79f8f5a
f79f8f50 f886cf16
[ 1117.831594] 0000000c dfd4e480 000000bc 00000003 00000000 c2161000
f5acc700 dfd4e480
[ 1117.831984] Call Trace:
[ 1117.832074] [<f882b18f>] apparmor_inode_permission+0x4f/0x70 [apparmor]
[ 1117.832205] [<f886cf16>] i2o_parm_table_get+0xb6/0x100 [i2o_core]
[ 1117.832309] [<f8cb3632>] i2o_seq_show_ddm_table+0x62/0x270 [i2o_proc]
[ 1117.832431] [<c019cc39>] seq_read+0x69/0x2a0
[ 1117.832541] [<c018274c>] vfs_read+0xbc/0x160
[ 1117.832635] [<c019cbd0>] seq_read+0x0/0x2a0
[ 1117.832725] [<c0182c81>] sys_read+0x41/0x70
[ 1117.832818] [<c010418a>] sysenter_past_esp+0x6b/0xa1
[ 1117.832919] [<c02f0000>] svc_disconnect+0x50/0x130
[ 1117.833032] =======================
[ 1117.833078] Code: 00 00 00 00 83 ec 3c 89 5c 24 2c 8b 5c 24 40 89 74 24 30
89 6c 24 38 8b 6c 24 48 89 7c 24 34 89 44 24 10 89 54 24 0c 89 4c 24 08 <8b> 40
24 89 44 24 14 8b 50 18 c7 44 24 1c 00 00 00 00 83 c2 48
[ 1117.835552] EIP: [<f886cc27>] i2o_parm_issue+0x27/0x260 [i2o_core] SS:ESP
0068:f7b47e84
This occurs obviously if one tries to read the file "ddm_table" or some
other file which is in there.
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
--
Kernel Oops NULL Pointer dereference on i2o_proc
https://bugs.launchpad.net/bugs/191688
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