2.6.18-rc4 panic in do_get_write_access()

2.6.18-rc4 doesn't survive fsx tests on 1k ext3 filesystem
with CONFIG_DEBUG_SLAB.

Known issue ?

Thanks,
Badari

elm3a241 login: kfree_debugcheck: bad ptr ffff8100d39ae000h.
----------- [cut here ] --------- [please bite here ] ---------
Kernel BUG at mm/slab.c:2698
invalid opcode: 0000 [1] SMP
CPU 0
Modules linked in: stap_2543 autofs4 hidp rfcomm l2cap bluetooth sunrpc
af_packet xt_state ip_conntrack nfnetlink xt_tcpudp ip6table_filter
ip6_tables x_tables ipv6 acpi_cpufreq freq_table processor binfmt_misc
parport_pc lp parport ide_cd cdrom generic floppy e752x_edac edac_mc
shpchp i2c_i801 uhci_hcd piix serio_raw ehci_hcd i2c_core pci_hotplug
usbcore dm_snapshot dm_zero dm_mirror dm_mod ide_disk ide_core
Pid: 2638, comm: fsx-linux Not tainted 2.6.18-rc4-smp #17
RIP: 0010:[<ffffffff8027de3d>]  [<ffffffff8027de3d>] kfree_debugcheck
+0x9a/0xa8
RSP: 0018:ffff81010d9ad5b8  EFLAGS: 00010096
RAX: 0000000000000030 RBX: ffff8100d39ae000 RCX: ffffffff8062daa0
RDX: 0000000000000000 RSI: 0000000000000092 RDI: 0000000100000000
RBP: ffff81010d9ad5c8 R08: 00000000000042ee R09: 0000000000000000
R10: 0000000000000092 R11: 0000000000000000 R12: ffff81010ab2dd60
R13: ffff8100d39ae000 R14: ffff8101212ddea8 R15: 0000000000000286
FS:  00002b611ab05200(0000) GS:ffffffff8069b000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002af34fee4000 CR3: 000000010b1c5000 CR4: 00000000000006e0
Process fsx-linux (pid: 2638, threadinfo ffff81010d9ac000, task
ffff81010b6a30c0)
Stack:  0000000000000000 0000000000000000 ffff81010d9ad618
ffffffff8027fbbc
 ffff81010d9ad618 ffffffff80309080 ffff81010d9ad608 0000000000000000
 ffff81010ab2dd60 ffff81010da6d928 ffff8101212ddea8 0000000000000000
Call Trace:
 [<ffffffff8027fbbc>] kfree+0x26/0x1f2
 [<ffffffff80304110>] do_get_write_access+0x52e/0x54f
 [<ffffffff803051a3>] journal_get_undo_access+0x2e/0x118
 [<ffffffff802f0a0c>] ext3_try_to_allocate_with_rsv+0x4b/0x504
 [<ffffffff802f117e>] ext3_new_blocks+0x2b9/0x74e
 [<ffffffff802f46d3>] ext3_get_blocks_handle+0x467/0xac4
 [<ffffffff802f5095>] ext3_get_block+0xc4/0xec
 [<ffffffff8028795c>] __block_prepare_write+0x1bf/0x41e
 [<ffffffff80287bdd>] block_prepare_write+0x22/0x30
 [<ffffffff802f660f>] ext3_prepare_write+0xb5/0x185
 [<ffffffff8025fbc3>] generic_file_buffered_write+0x2c7/0x6b7
 [<ffffffff80260298>] __generic_file_aio_write_nolock+0x2e5/0x331
 [<ffffffff8026034d>] generic_file_aio_write+0x69/0xc4
 [<ffffffff802f21a6>] ext3_file_write+0x1e/0x9b
 [<ffffffff80284804>] do_sync_write+0xf0/0x12e
 [<ffffffff80285197>] vfs_write+0xcf/0x175
 [<ffffffff8028577f>] sys_write+0x47/0x70
 [<ffffffff8020988e>] system_call+0x7e/0x83
DWARF2 unwinder stuck at system_call+0x7e/0x83
Leftover inexact backtrace:


Code: 0f 0b 68 ae 3c 4a 80 c2 8a 0a 58 5b c9 c3 55 48 89 e5 41 57
RIP  [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8
 RSP <ffff81010d9ad5b8>
 <3>BUG: sleeping function called from invalid context at
kernel/rwsem.c:20
in_atomic():0, irqs_disabled():1

Call Trace:
 [<ffffffff8020ad7f>] show_trace+0xae/0x30e
 [<ffffffff8020aff4>] dump_stack+0x15/0x17
 [<ffffffff802288a5>] __might_sleep+0xb2/0xb4
 [<ffffffff8024750e>] down_read+0x1d/0x2f
 [<ffffffff8023e674>] blocking_notifier_call_chain+0x1b/0x41
 [<ffffffff80232511>] profile_task_exit+0x15/0x17
 [<ffffffff80233f95>] do_exit+0x25/0x91e
 [<ffffffff8020b222>] kernel_math_error+0x0/0x96
 [<ffff81010b6a30c0>]
DWARF2 unwinder stuck at 0xffff81010b6a30c0
Leftover inexact backtrace:
 [<ffffffff80471079>] do_trap+0xe0/0xef
 [<ffffffff8020b82d>] do_invalid_op+0xa7/0xb3
 [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8
 [<ffffffff804707db>] _spin_unlock_irq+0x9/0xc
 [<ffffffff8046e95e>] thread_return+0x5e/0xef
 [<ffffffff8020a55d>] error_exit+0x0/0x84
 [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8
 [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8
 [<ffffffff8027fbbc>] kfree+0x26/0x1f2
 [<ffffffff80309080>] journal_cancel_revoke+0x137/0x1ac
 [<ffffffff80304110>] do_get_write_access+0x52e/0x54f
 [<ffffffff80244b7f>] wake_bit_function+0x0/0x2a
 [<ffffffff80286ca7>] __find_get_block+0x171/0x183
 [<ffffffff803051a3>] journal_get_undo_access+0x2e/0x118
 [<ffffffff802f0a0c>] ext3_try_to_allocate_with_rsv+0x4b/0x504
 [<ffffffff80286cf2>] __getblk+0x39/0x25c
 [<ffffffff80288592>] __bread+0xe/0xb5
 [<ffffffff802f117e>] ext3_new_blocks+0x2b9/0x74e
 [<ffffffff802f46d3>] ext3_get_blocks_handle+0x467/0xac4
 [<ffffffff8028613f>] alloc_buffer_head+0x19/0x40
 [<ffffffff8027dd28>] cache_alloc_debugcheck_after+0x1a5/0x1b4
 [<ffffffff8028613f>] alloc_buffer_head+0x19/0x40
 [<ffffffff8027ef82>] kmem_cache_alloc+0xbe/0xca
 [<ffffffff802f5095>] ext3_get_block+0xc4/0xec
 [<ffffffff8028795c>] __block_prepare_write+0x1bf/0x41e
 [<ffffffff802f4fd1>] ext3_get_block+0x0/0xec
 [<ffffffff80287bdd>] block_prepare_write+0x22/0x30
 [<ffffffff802f660f>] ext3_prepare_write+0xb5/0x185
 [<ffffffff80470693>] _write_unlock_irq+0x9/0xc
 [<ffffffff8025fbc3>] generic_file_buffered_write+0x2c7/0x6b7
 [<ffffffff8029e15d>] touch_atime+0x6b/0xaa
 [<ffffffff80236172>] current_fs_time+0x3f/0x41
 [<ffffffff8025f059>] do_generic_mapping_read+0x42e/0x47a
 [<ffffffff80260298>] __generic_file_aio_write_nolock+0x2e5/0x331
 [<ffffffff8026034d>] generic_file_aio_write+0x69/0xc4
 [<ffffffff802f21a6>] ext3_file_write+0x1e/0x9b
 [<ffffffff80284804>] do_sync_write+0xf0/0x12e
 [<ffffffff80244b47>] autoremove_wake_function+0x0/0x38
 [<ffffffff8046f59e>] mutex_lock+0x22/0x32
 [<ffffffff80285197>] vfs_write+0xcf/0x175
 [<ffffffff8028577f>] sys_write+0x47/0x70
 [<ffffffff8020988e>] system_call+0x7e/0x83




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