Bug 64672

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0; Q312461)

Description of problem:
running '/usr/etc/rdump 0ua -f /dev/dull /' will requently cause a kernel oops. 
Possibly due to a buffer flush trashing buffers used by ext3 when the file 
system is mounted.

Version-Release number of selected component (if applicable):


How reproducible:
Sometimes

Steps to Reproduce:
1. /usr/etc/rdump 0ua -f /dev/dull /


	

Actual Results:  Should complete all steps of the dump successfully.

Expected Results:  either segfaults or crashes the host.


Additional info:

the following oops often occurs:

May  9 10:31:22 brazos kernel:  invalidate: busy buffer
May  9 10:31:22 brazos kernel: invalidate: busy buffer
May  9 10:31:22 brazos last message repeated 35 times
May  9 10:31:22 brazos kernel: ------------[ cut here ]------------
May  9 10:31:22 brazos kernel: kernel BUG at page_alloc.c:226!
May  9 10:31:22 brazos kernel: invalid operand: 0000
May  9 10:31:22 brazos kernel: CPU:    0
May  9 10:31:22 brazos kernel: EIP:    0010:[rmqueue+138/688]    Not tainted
May  9 10:31:22 brazos kernel: EIP:    0010:[<c012fbaa>]    Not tainted
May  9 10:31:22 brazos kernel: EFLAGS: 00010086
May  9 10:31:22 brazos kernel: EIP is at rmqueue [kernel] 0x8a 
May  9 10:31:22 brazos kernel: eax: 00000020   ebx: c1633971   ecx: 00000001   
edx: 001b93d7
May  9 10:31:22 brazos kernel: esi: c1633971   edi: c02c3414   ebp: 00000002   
esp: d9fbde68
May  9 10:31:22 brazos kernel: ds: 0018   es: 0018   ss: 0018
May  9 10:31:22 brazos kernel: Process rdump (pid: 6191, stackpage=d9fbd000)
May  9 10:31:22 brazos kernel: Stack: c02987bb 000000e2 00001000 00001000 
00000282 00000000 c02c33bc c02c33bc 
May  9 10:31:22 brazos kernel:        c02c3578 00000000 000001ff c012ff55 
c012678d 00000001 c02c3574 000001d0 
May  9 10:31:22 brazos kernel:        dfb09a94 00000017 000100f8 c17d0e4c 
c0126801 dc826264 dc826264 00000017 
May  9 10:31:22 brazos kernel: Call Trace: [__alloc_pages+117/768] 
__alloc_pages [kernel] 0x75 
May  9 10:31:22 brazos kernel: Call Trace: [<c012ff55>] __alloc_pages [kernel] 
0x75 
May  9 10:31:22 brazos kernel: [add_to_page_cache_unique+109/128] 
add_to_page_cache_unique [kernel] 0x6d 
May  9 10:31:22 brazos kernel: [<c012678d>] add_to_page_cache_unique [kernel] 
0x6d 
May  9 10:31:22 brazos kernel: [page_cache_read+97/192] page_cache_read 
[kernel] 0x61 
May  9 10:31:22 brazos kernel: [<c0126801>] page_cache_read [kernel] 0x61 
May  9 10:31:22 brazos kernel: [generic_file_readahead+279/352] 
generic_file_readahead [kernel] 0x117 
May  9 10:31:22 brazos kernel: [<c0126f37>] generic_file_readahead [kernel] 
0x117 
May  9 10:31:22 brazos kernel: [do_generic_file_read+563/1280] 
do_generic_file_read [kernel] 0x233 
May  9 10:31:22 brazos kernel: [<c01271b3>] do_generic_file_read [kernel] 0x233 
May  9 10:31:22 brazos kernel: [generic_file_read+126/304] generic_file_read 
[kernel] 0x7e 
May  9 10:31:22 brazos kernel: [<c01277ce>] generic_file_read [kernel] 0x7e 
May  9 10:31:22 brazos kernel: [file_read_actor+0/224] file_read_actor [kernel] 
0x0 
May  9 10:31:22 brazos kernel: [<c0127670>] file_read_actor [kernel] 0x0 
May  9 10:31:22 brazos kernel: [sys_read+150/208] sys_read [kernel] 0x96 
May  9 10:31:22 brazos kernel: [<c01367d6>] sys_read [kernel] 0x96 
May  9 10:31:22 brazos kernel: [tracesys+31/35] tracesys [kernel] 0x1f 
May  9 10:31:22 brazos kernel: [<c0106f5f>] tracesys [kernel] 0x1f 
May  9 10:31:23 brazos kernel: 
May  9 10:31:23 brazos kernel: 
May  9 10:31:23 brazos kernel: Code: 0f 0b 59 58 8b 53 04 8b 03 89 50 04 89 02 
8b 44 24 10 8b 90 
May  9 10:31:27 brazos kernel:  ------------[ cut here ]------------
May  9 10:31:27 brazos kernel: kernel BUG at page_alloc.c:226!