Re: Newbie: ENBD on kernel 2.6 - kernel crash!

Peter

My gcc is 3.4.3:

[root@rolandpj-box0 ~]# gcc -v
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/u
sr/share/info --enable-shared --enable-threads=posix --disable-checking 
--with-s
ystem-zlib --enable-__cxa_atexit --disable-libunwind-exceptions 
--enable-java-aw
t=gtk --host=i386-redhat-linux
Thread model: posix
gcc version 3.4.3 20050227 (Red Hat 3.4.3-22.fc3)

The enbd.ko module seems to be crashing in the call to 
blk_queue_max_sectors() which is the first thing that enbd_init_queue 
tries to do (it doesn't reach my debug line immediately after this 
call). Is there maybe some queue stuff different in 2.6.9+ ?

[root@rolandpj-box0 ~]# tail -n 80 /var/log/messages
May 17 17:15:12 localhost rc: Starting xend:  failed
May 17 17:15:13 localhost kernel: ACPI: PCI interrupt 0000:00:02.0[A] -> 
GSI 10
(level, low) -> IRQ 10
May 17 17:15:13 localhost kernel: [drm] Initialized i915 1.1.0 20040405 
on minor
 0:
May 17 17:15:13 localhost kernel: mtrr: base(0xf0020000) is not aligned 
on a siz
e(0x800000) boundary
May 17 17:15:21 localhost gdm(pam_unix)[3318]: session opened for user 
rolandpj
by (uid=0)
May 17 17:15:22 localhost gconfd (rolandpj-3477): starting (version 
2.8.1), pid
3477 user 'rolandpj'
May 17 17:15:22 localhost gconfd (rolandpj-3477): Resolved address 
"xml:readonly
:/etc/gconf/gconf.xml.mandatory" to a read-only configuration source at 
position
 0
May 17 17:15:22 localhost gconfd (rolandpj-3477): Resolved address 
"xml:readwrit
e:/home/rolandpj/.gconf" to a writable configuration source at position 1
May 17 17:15:22 localhost gconfd (rolandpj-3477): Resolved address 
"xml:readonly
:/etc/gconf/gconf.xml.defaults" to a read-only configuration source at 
position
2
May 17 17:15:45 localhost gconfd (rolandpj-3477): Resolved address 
"xml:readwrit
e:/home/rolandpj/.gconf" to a writable configuration source at position 0
May 17 17:16:48 localhost su(pam_unix)[3583]: session opened for user 
root by ro
landpj(uid=503)
May 17 17:16:58 localhost kernel: enbd: no version for "struct_module" 
found: ke
rnel tainted.
May 17 17:16:58 localhost kernel: ENBD #5227[0]: enbd_init Network Block 
Device
originally by [email protected]
May 17 17:16:58 localhost kernel: ENBD #5228[0]: enbd_init Network Block 
Device
port to 2.0 by [email protected]
May 17 17:16:58 localhost kernel: ENBD #5230[0]: enbd_init Network Block 
Device
move networking to user space by [email protected]
May 17 17:16:58 localhost kernel: ENBD #5232[0]: enbd_init Enhanced 
Notwork Bloc
k Device 2.4.32 RPJ $Date: 2002/09/17 16:33:22 $ by [email protected]
May 17 17:16:58 localhost kernel: ENBD #5234[0]: enbd_init
May 17 17:16:58 localhost kernel: ENBD #5235[0]: enbd_init     RPJ: 
setting up 1
6 enbd_devs
May 17 17:16:58 localhost kernel: ENBD #5239[0]: enbd_init
May 17 17:16:58 localhost kernel: ENBD #5240[0]: enbd_init     RPJ: 
setting up e
nbd_devs 0
May 17 17:16:58 localhost kernel: ENBD #5249[0]: enbd_init     RPJ:  lo 
at 823d0
fa0, disk at 8140b600
May 17 17:16:58 localhost kernel: ENBD #5253[0]: enbd_init     RPJ:      
spin_lo
ck_init...
May 17 17:16:58 localhost kernel: ENBD #5255[0]: enbd_init     RPJ:      
blk_ini
t_queue...
May 17 17:16:58 localhost kernel: ENBD #5257[0]: enbd_init     RPJ:      
...blk_
init_queue'ed
May 17 17:16:58 localhost kernel: ENBD #5274[0]: enbd_init     RPJ:      
enbd_in
it_queue...
May 17 17:16:58 localhost kernel: ENBD #5153[0]: enbd_init_queue     
RPJ:      e
nbd_init_queue 1: lo is 823d0fa0, queue is 69a93d18 ...
May 17 17:16:58 localhost kernel: Unable to handle kernel NULL pointer 
dereferen
ce at virtual address 000003fe
May 17 17:16:58 localhost kernel:  printing eip:
May 17 17:16:58 localhost kernel: 0224694b
May 17 17:16:58 localhost kernel: *pde = 00000000
May 17 17:16:58 localhost kernel: Oops: 0002 [#1]
May 17 17:16:58 localhost kernel: Modules linked in: enbd(U) i915 nfs 
nfsd expor
tfs lockd parport_pc lp parport autofs4 i2c_dev i2c_core sunrpc 
ipt_REJECT ipt_s
tate ip_conntrack iptable_filter ip_tables dm_mod button battery ac md5 
ipv6 uhc
i_hcd ehci_hcd hw_random snd_intel8x0 snd_ac97_codec snd_pcm_oss 
snd_mixer_oss s
nd_pcm snd_timer snd_page_alloc gameport snd_mpu401_uart snd_rawmidi 
snd_seq_dev
ice snd soundcore tg3 floppy ext3 jbd
May 17 17:16:58 localhost kernel: CPU:    0
May 17 17:16:58 localhost kernel: EIP:    0060:[<0224694b>]    Tainted: 
GF  VLI
May 17 17:16:58 localhost kernel: EFLAGS: 00210212   (2.6.9-1.667)
May 17 17:16:58 localhost kernel: EIP is at blk_queue_max_sectors+0x2c/0x3d
May 17 17:16:58 localhost kernel: eax: 019df800   ebx: 0000cefc   ecx: 
823cc0b7
  edx: 69c1cefc
May 17 17:16:58 localhost kernel: esi: 00000200   edi: 823d2c70   ebp: 
8140b600
  esp: 69c1cef0
May 17 17:16:58 localhost kernel: ds: 007b   es: 007b   ss: 0068
May 17 17:16:58 localhost kernel: Process insmod (pid: 3618, 
threadinfo=69c1c000
 task=698858b0)
May 17 17:16:58 localhost kernel: Stack: 69a93d18 823d0fa0 8211a3f6 
69a93d18 000
00200 021468f0 00200286 00000090
May 17 17:16:58 localhost kernel:        75536a80 00000001 00200202 
825ecd94 000
00000 00000000 823d0780 0213b7e3
May 17 17:16:58 localhost kernel:        825ecd94 0008f497 00000708 
69f054bc 755
36e00 00000000 00000000 00000013
May 17 17:16:58 localhost kernel: Call Trace:
May 17 17:16:58 localhost kernel:  [<8211a3f6>] init_module+0x3f6/0x10c0 
[enbd]
May 17 17:16:58 localhost kernel:  [<021468f0>] free_hot_cold_page+0x98/0xca
May 17 17:16:58 localhost kernel:  [<0213b7e3>] load_module+0x7d1/0x831
May 17 17:16:58 localhost kernel:  [<0213ba4a>] sys_init_module+0x207/0x2ef
May 17 17:16:58 localhost kernel: Code: <3>Debug: sleeping function 
called from
invalid context at include/linux/rwsem.h:43
May 17 17:16:58 localhost kernel: in_atomic():0[expected: 0], 
irqs_disabled():1
May 17 17:16:58 localhost kernel:  [<0211c8b9>] __might_sleep+0x7d/0x88
May 17 17:16:58 localhost kernel:  [<0215e27e>] rw_vm+0x216/0x482
May 17 17:16:58 localhost kernel:  [<02246920>] 
blk_queue_max_sectors+0x1/0x3d
May 17 17:16:58 localhost kernel:  [<02246920>] 
blk_queue_max_sectors+0x1/0x3d
May 17 17:16:58 localhost kernel:  [<0215e9d0>] get_user_size+0x30/0x57
May 17 17:16:58 localhost kernel:  [<02246920>] 
blk_queue_max_sectors+0x1/0x3d
May 17 17:16:58 localhost kernel:  [<0210682b>] show_registers+0x109/0x15e
May 17 17:16:58 localhost kernel:  [<02106a2f>] die+0x14a/0x241
May 17 17:16:58 localhost kernel:  [<0211937e>] do_page_fault+0x0/0x511
May 17 17:16:58 localhost kernel:  [<0211937e>] do_page_fault+0x0/0x511
May 17 17:16:58 localhost kernel:  [<02119733>] do_page_fault+0x3b5/0x511
May 17 17:16:58 localhost kernel:  [<0224694b>] 
blk_queue_max_sectors+0x2c/0x3d
May 17 17:16:58 localhost kernel:  [<0211aecf>] activate_task+0x53/0x5f
May 17 17:16:58 localhost kernel:  [<0211cf68>] 
autoremove_wake_function+0xd/0x2
d
May 17 17:16:58 localhost kernel:  [<0211b95b>] __wake_up_common+0x36/0x51
May 17 17:16:58 localhost kernel:  [<021dd329>] vsnprintf+0x448/0x488
May 17 17:16:58 localhost kernel:  [<0211937e>] do_page_fault+0x0/0x511
May 17 17:16:58 localhost kernel:  [<0212007b>] 
call_console_drivers+0x98/0xd8
May 17 17:16:58 localhost kernel:  [<0224694b>] 
blk_queue_max_sectors+0x2c/0x3d
May 17 17:16:58 localhost kernel:  [<8211a3f6>] init_module+0x3f6/0x10c0 
[enbd]
May 17 17:16:58 localhost kernel:  [<021468f0>] free_hot_cold_page+0x98/0xca
May 17 17:16:58 localhost kernel:  [<0213b7e3>] load_module+0x7d1/0x831
May 17 17:16:58 localhost kernel:  [<0213ba4a>] sys_init_module+0x207/0x2ef
May 17 17:16:58 localhost kernel:  Bad EIP value.
May 17 17:20:01 localhost crond(pam_unix)[3621]: session opened for user 
root by
 (uid=0)
May 17 17:20:01 localhost crond(pam_unix)[3620]: session opened for user 
root by
 (uid=0)
May 17 17:20:01 localhost crond(pam_unix)[3621]: session closed for user 
root
May 17 17:20:01 localhost crond(pam_unix)[3620]: session closed for user 
root
May 17 17:21:02 localhost sshd(pam_unix)[3720]: session opened for user 
rolandpj
 by (uid=0)
May 17 17:22:16 localhost su(pam_unix)[3747]: session opened for user 
root by ro
landpj(uid=503)
[root@rolandpj-box0 ~]#

Roland

Peter T. Breuer wrote:

>"Also sprach Roland Paterson-Jones:"
>  
>
>>This might be a dumb question, but is the gcc version crucial? Could 
>>that be the problem?
>>    
>>
>
>Sure - a bad gcc can cuase problems. Only certain compilers are
>certified to compile the kernel with. I always use gcc 2.95.4. I
>wouldn't trust anything more recent, though I do have gcc 3.4.0
>installed for comparison purposes.
>
>To me it just looks as though you had random garbage lying around that
>got included in the compile. Make sure you clean out the compile
>directory (rm -fr /tmp/*, by the look of your messages) thoroughly.
>
>Peter
>_______________________________________________
>ENBD mailing list
>[email protected]
>http://lists.community.tummy.com/mailman/listinfo/enbd
>
>
>  
>