ReiserFS 3.6 SegFault on mount attempt
 

Hi all,

environment:
Knoppix Live CD 5.0 (the latest downloaded few minutes ago)
reiserfsprogs 3.6.19-2
kernel 2.6.17

have following problem:

disk with reiserfs get corrupted, partition table was lost. I have created new partition (working on "dd" image on the new disk) and run

fsck.reiserfs --rebuild-sb /dev/hdb4
fsck.reiserfs --check
fsck.reiserfs --rebuild-tree --scan-whole-partition /dev/hdb4

after that the partition seems to be OK (fsck.reiserfs --check shows no corruption) (and during semantic test I can see the filenames ....)

When I try to mount the partition I got following results:

mount /dev/hdb4 /rescue
You must specify filesystem type (or something like that)

mount /dev/hdb4 -t reiserfs /rescue
Segmantation Fault

(with following error in dmesg:
ReiserFS: hdb4: found reiserfs format "3.6" with standard journal
BUG: unable to handle kernel paging request at virtual address f8d6a004
printing eip:
f8e29ba9
*pde = 1ff18067
*pte = 00000000
Oops: 0002 [#1]
PREEMPT SMP
Modules linked in: efs ipv6 sworks_agp nvidia_agp efficeon_agp amd64_agp ali_agp af_packet reiserfs dm_mod agpgart fuse sg i2c_i801 tsdev parport_pc parport 8250_pnp 8250 aic79xx serial_core tg3 i2c_core shpchp e752x_edac edac_mc pci_hotplug evdev usbhid pcmcia firmware_class yenta_socket rsrc_nonstatic pcmcia_core video thermal processor fan container button battery ac unionfs cloop sbp2 ohci1394 ieee1394 usb_storage ohci_hcd uhci_hcd ehci_hcd usbcore
CPU: 0
EIP: 0060:[<f8e29ba9>] Not tainted VLI
EFLAGS: 00210202 (2.6.17 #4)
EIP is at reiserfs_fill_super+0x449/0xf68 [reiserfs]
eax: f7a7ccd0 ebx: 00002000 ecx: c016a3a8 edx: f75f3c38
esi: f8d6a000 edi: 00000400 ebp: f7aacc00 esp: f75f3c6c
ds: 007b es: 007b ss: 0068
Process mount (pid: 4440, threadinfo=f75f2000 task=f7efda90)
Stack: <0>c18f3040 00000403 00000000 00001000 f32126c0 00000094 00000001 c66d4000
f32126c0 00000000 c66d4000 00000003 00000000 00000003 00000000 00000000
00000000 00000000 00000000 00000000 00000004 00000004 00000000 00000020
Call Trace:
<c01f1dcb> vsnprintf+0x30b/0x534 <c01f2032> snprintf+0x1a/0x20
<c01a04a7> disk_name+0x5b/0x84 <c016f2b9> get_sb_bdev+0xc9/0x104
<f8e27b8e> get_super_block+0x1a/0x20 [reiserfs] <f8e29760> reiserfs_fill_super+0x0/0xf68 [reiserfs]
<c016e986> do_kern_mount+0x9a/0x144 <c018428d> do_mount+0x35d/0x6b4
<c01774f2> link_path_walk+0x66/0xd0 <c01577ae> __handle_mm_fault+0x52a/0x83c
<c0157464> __handle_mm_fault+0x1e0/0x83c <c01577e5> __handle_mm_fault+0x561/0x83c
<c01576ed> __handle_mm_fault+0x469/0x83c <c014f63c> get_page_from_freelist+0xb8/0x458
<c014fa29> __alloc_pages+0x4d/0x2d4 <c014ff00> __get_free_pages+0x28/0x3c
<c0183078> copy_mount_options+0x30/0x160 <c018465a> sys_mount+0x76/0xb4
<c010336b> syscall_call+0x7/0xb
Code: 31 ff 8b 85 c0 01 00 00 8d 1c fd 00 00 00 00 89 de 03 70 08 ff 75 0c 8b 44 24 20 01 f8 99 52 50 ff b5 b8 00 00 00 e8 23 33 34 c7 <89> 46 04 8b 85 c0 01 00 00 89 da 03 50 08 83 c4 10 8b 4a 04 85
EIP: [<f8e29ba9>] reiserfs_fill_super+0x449/0xf68 [reiserfs] SS:ESP 0068:f75f3c6c


another attempt causes the mount process to hang in D+ state


Any idea?

P.S. tried also on Sarge ... same results

Thanx

Harry

will it seg fault if you format as another partition type and mount it?

Problem is in reiserfsprogs?
 

Hi,

thanx for the answer.

It seems there is a bug in the latest reiserfsprogs or it is incompatible with the filesystem on the disk

I tried to use older version of Knoppix (4) with reiserfsprogs-3.6.19-1 and it works now - no segfault, mount successfull

However the filesystem seems to be dead - I can see files, but except few all of them are full of thrash ... well, this is how the data can end ...

Thanx again

Harry