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Subjectreiserfs corruption with 2.6.0-test
I had some file system corruption on one partition today. When programs
tried to open certain files, they segfaulted and after that the whole
system came down hard. No idea how the corruption happened -- until
today I haven't had a kernel crash for a long time.

Both 2.6.0-test3 and -test2 produced kernel NULL pointer dereferences with
those files. fsck found the corruption fixable. Works again now.

Back traces attached for your viewing pleasure.

Roger

------------------------------------------------------------------------------
Unable to handle kernel NULL pointer dereference at virtual address 00000018
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<c01eed9c>] Not tainted
EFLAGS: 00010206
EIP is at _mmx_memcpy+0x5c/0x150
eax: f778c018 ebx: 00000008 ecx: 00000000 edx: 00000000
esi: 00000018 edi: f778c018 ebp: e2cd3934 esp: e2cd3924
ds: 007b es: 007b ss: 0068
Process unison (pid: 3846, threadinfo=e2cd2000 task=f694b5c0)
Stack: f778c018 00000210 00000018 f778c227 e2cd3984 c01d2991 f778c018 00000018
00000210 f778c018 f778c000 00000284 f7788240 00000000 0000fd98 00006972
f778e450 00000016 00000000 f778e360 e2cd39e0 00000016 00000001 00000000
Call Trace:
[<c01d2991>] leaf_copy_items_entirely+0x271/0x290
[<c01d2faa>] leaf_copy_items+0xda/0x190
[<c01d327b>] leaf_move_items+0x5b/0xa0
[<c01d33a8>] leaf_shift_right+0x38/0x80
[<c01bc0e6>] balance_leaf+0x3d6/0x2aa0
[<c0146e50>] find_get_page+0x70/0x140
[<c0173040>] bh_lru_install+0xa0/0xd0
[<c01cb3aa>] get_parents+0xca/0x190
[<c01730b6>] __find_get_block+0x46/0xb0
[<c01ccca0>] clear_all_dirty_bits+0x20/0x30
[<c01cce82>] wait_tb_buffers_until_unlocked+0x1d2/0x380
[<c01beb44>] do_balance+0x94/0x110
[<c01cd1ff>] fix_nodes+0x1cf/0x420
[<c01d943d>] reiserfs_paste_into_item+0x11d/0x130
[<c01bf9ec>] reiserfs_add_entry+0x34c/0x500
[<c01bfd57>] reiserfs_create+0x107/0x190
[<c018112f>] permission+0x2f/0x50
[<c0182e6b>] vfs_create+0x6b/0xc0
[<c0183467>] open_namei+0x3e7/0x450
[<c016dbc1>] filp_open+0x41/0x70
[<c016e333>] sys_open+0x53/0x90
[<c0109eff>] syscall_call+0x7/0xb

Code: 0f 6f 06 0f 6f 4e 08 0f 6f 56 10 0f 6f 5e 18 0f 7f 00 0f 7f
is_tree_node: node level 12084 does not match to the expected one 3
vs-5150: search_by_key: invalid format found in block 8213. Fsck?
zam-7001: io error in reiserfs_find_entry
is_tree_node: node level 12084 does not match to the expected one 3
vs-5150: search_by_key: invalid format found in block 8213. Fsck?
zam-7001: io error in reiserfs_find_entry
SysRq : Emergency Sync
------------------------------------------------------------------------------
<1>Unable to handle kernel NULL pointer dereference at virtual address 00000030
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<f9aec8e8>] Not tainted
EFLAGS: 00010046
EIP is at rh_report_status+0xe8/0x370 [usbcore]
eax: 00000000 ebx: c1d5e524 ecx: f7bca944 edx: f6a03688
esi: 00000282 edi: c0313460 ebp: f6a03660 esp: f6a03634
ds: 007b es: 007b ss: 0068
Process unison (pid: 3577, threadinfo=f6a02000 task=f6cb4e80)
Stack: 00000001 00000000 f6a0365c c012ce86 00000000 00000001 c03144b0 f6a036f8
c1d5e524 f9aec800 c0313460 f6a036a0 c012d00d c1d5e524 f6a0369c c0111a6a
f6a036f8 f6a036c8 c01d53ed 00000000 f6a03688 f6a03688 f6a03688 c0312210
Call Trace:
[<c012ce86>] update_process_times+0x46/0x50
[<f9aec800>] rh_report_status+0x0/0x370 [usbcore]
[<c012d00d>] run_timer_softirq+0x15d/0x3e0
[<c0111a6a>] timer_interrupt+0x8a/0x250
[<c01d53ed>] leaf_insert_into_buf+0x18d/0x280
[<c0127e25>] do_softirq+0xa5/0xb0
[<c010c12d>] do_IRQ+0x20d/0x350
[<c010a0dc>] common_interrupt+0x18/0x20
[<c0116e64>] delay_tsc+0x14/0x20
[<c01f0b44>] __delay+0x14/0x20
[<c0223632>] serial8250_console_write+0xa2/0x230
[<c0122e90>] __call_console_drivers+0x60/0x70
[<c0122f6c>] call_console_drivers+0x5c/0x120
[<c01235b5>] release_console_sem+0xf5/0x270
[<c01232ff>] printk+0x25f/0x3c0
[<c01f0d4c>] _mmx_memcpy+0x5c/0x150
[<c011a8f3>] do_page_fault+0x213/0x4aa
[<c0123eb1>] profile_hook+0x21/0x23
[<c0111a6a>] timer_interrupt+0x8a/0x250
[<c010c12d>] do_IRQ+0x20d/0x350
[<c011a6e0>] do_page_fault+0x0/0x4aa
[<c010a119>] error_code+0x2d/0x38
[<c01f0d4c>] _mmx_memcpy+0x5c/0x150
[<c01d4661>] leaf_copy_items_entirely+0x271/0x290
[<c01d4c7a>] leaf_copy_items+0xda/0x190
[<c01d4f4b>] leaf_move_items+0x5b/0xa0
[<c01d5078>] leaf_shift_right+0x38/0x80
[<c01bdd46>] balance_leaf+0x3d6/0x2aa0
[<c0148040>] find_get_page+0x70/0x140
[<c0174610>] bh_lru_install+0xa0/0xd0
[<c01cd07a>] get_parents+0xca/0x190
[<c0174686>] __find_get_block+0x46/0xb0
[<c01ce970>] clear_all_dirty_bits+0x20/0x30
[<c01ceb52>] wait_tb_buffers_until_unlocked+0x1d2/0x380
[<c01c07a4>] do_balance+0x94/0x110
[<c01ceecf>] fix_nodes+0x1cf/0x420
[<c01db10d>] reiserfs_paste_into_item+0x11d/0x130
[<c01c164c>] reiserfs_add_entry+0x34c/0x500
[<c01c19b7>] reiserfs_create+0x107/0x190
[<c018279f>] permission+0x2f/0x50
[<c01844db>] vfs_create+0x6b/0xc0
[<c0184ad7>] open_namei+0x3e7/0x450
[<c016f0d1>] filp_open+0x41/0x70
[<c016f843>] sys_open+0x53/0x90
[<c0109f6f>] syscall_call+0x7/0xb

Code: 8b 78 30 85 ff 0f 84 78 ff ff ff 8b 97 34 01 00 00 8b 43 3c
<0>Kernel panic: Fatal exception in interrupt
In interrupt handler - not syncing
------------------------------------------------------------------------------
-
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