=============================================
[ INFO: possible recursive locking detected ]
---------------------------------------------
java/6746 is trying to acquire lock:
 (slock-AF_INET6){-+..}, at: [<c03be6f4>] sk_clone+0xf4/0x310

but task is already holding lock:
 (slock-AF_INET6){-+..}, at: [<c0444eaf>] tcp_v6_rcv+0x34f/0x6f0

other info that might help us debug this:
1 lock held by java/6746:
 #0:  (slock-AF_INET6){-+..}, at: [<c0444eaf>] tcp_v6_rcv+0x34f/0x6f0

stack backtrace:
 [<c01034b9>] show_trace+0x19/0x20
 [<c01035ba>] dump_stack+0x1a/0x20
 [<c0131454>] print_deadlock_bug+0xa4/0xb0
 [<c01314ca>] check_deadlock+0x6a/0x80
 [<c0132cf7>] __lock_acquire+0x4f7/0x950
 [<c01337cd>] lock_acquire+0x5d/0x80
 [<c0483415>] _spin_lock+0x25/0x30
 [<c03be6f4>] sk_clone+0xf4/0x310
 [<c03e6b31>] inet_csk_clone+0x11/0x70
 [<c03fb3c5>] tcp_create_openreq_child+0x15/0x3e0
 [<c04442c2>] tcp_v6_syn_recv_sock+0x142/0x610
 [<c03fb8a9>] tcp_check_req+0x119/0x420
 [<c0443d75>] tcp_v6_hnd_req+0x45/0x130
 [<c0444af7>] tcp_v6_do_rcv+0x247/0x2b0
 [<c0445136>] tcp_v6_rcv+0x5d6/0x6f0
 [<c04272df>] ip6_input+0x16f/0x340
 [<c0427004>] ipv6_rcv+0x114/0x280
 [<c03c6eb1>] netif_receive_skb+0x1b1/0x1f0
 [<c03c6f80>] process_backlog+0x90/0x120
 [<c03c707d>] net_rx_action+0x6d/0x100
 [<c011d68f>] __do_softirq+0x6f/0x100
 [<c0104de7>] do_softirq+0x87/0xe0
 =======================
 [<c011d5d9>] local_bh_enable_ip+0xb9/0x100
 [<c0483661>] _spin_unlock_bh+0x31/0x40
 [<c03bf750>] release_sock+0x50/0xb0
 [<c0405647>] inet_wait_for_connect+0x67/0xd0
 [<c0405748>] inet_stream_connect+0x98/0x1d0
 [<c03bc6d7>] sys_connect+0x67/0xa0
 [<c03bd1c6>] sys_socketcall+0xc6/0x1e0
 [<c0102e77>] syscall_call+0x7/0xb
BUG: unable to handle kernel paging request at virtual address 170fc2c3
 printing eip:
c03d958a
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
Modules linked in:
CPU:    0
EIP:    0060:[<c03d958a>]    Not tainted VLI
EFLAGS: 00010286   (2.6.18 #3)
EIP is at __ip_select_ident+0x4a/0xa0
eax: c6b78050   ebx: c613d8bc   ecx: ffffffff   edx: c05f7000
esi: 170fc2a5   edi: c13f1814   ebp: c05f7e70   esp: c05f7e64
ds: 007b   es: 007b   ss: 0068
Process java (pid: 6844, ti=c05f7000 task=c6b78050 task.ti=c0eb3000)
Stack: c3fd3254 c13f1814 c8a62034 c05f7f38 c03e0df8 c13f1814 c613d8bc 00000000
       00000000 c613d8bc c05f7ea0 c03bf290 cdfc85dc c05f7ea0 c05f7ebc c01334dd
       fffffff5 c8a62034 c05f7f70 c0406027 c8a62034 00000000 c05f7ed4 c613d8bc
Call Trace:
 [<c010354e>] show_stack_log_lvl+0x8e/0xb0
 [<c010370a>] show_registers+0x14a/0x1d0
 [<c0103987>] die+0x167/0x210
 [<c010eef3>] do_page_fault+0x173/0x580
 [<c0103199>] error_code+0x39/0x40
 [<c03e0df8>] ip_queue_xmit+0x468/0x520
 [<c03f26df>] tcp_transmit_skb+0x27f/0x4b0
 [<c03f4a93>] tcp_retransmit_skb+0x153/0x2d0
 [<c03f66af>] tcp_retransmit_timer+0xdf/0x3f0
 [<c03f6a91>] tcp_write_timer+0xd1/0x100
 [<c0122154>] run_timer_softirq+0xb4/0x1a0
 [<c011d68f>] __do_softirq+0x6f/0x100
 [<c0104de7>] do_softirq+0x87/0xe0
 =======================
 [<c011d773>] irq_exit+0x53/0x60
 [<c0104c5a>] do_IRQ+0x6a/0xb0
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e30b>] memcpy+0x3b/0x50
 [<c028e378>] memmove+0x38/0x50
 [<c01bf9cd>] leaf_paste_in_buffer+0x7d/0x320
 [<c01a879c>] balance_leaf+0x24c/0x27d0
 [<c01ab050>] do_balance+0x60/0xf0
 [<c01c5854>] reiserfs_paste_into_item+0x164/0x190
 [<c01b3c25>] reiserfs_allocate_blocks_for_region+0x925/0x12e0
 [<c01b5c9c>] reiserfs_file_write+0x72c/0x7c0
 [<c01668d8>] vfs_write+0x88/0x170
 [<c0166a6c>] sys_write+0x3c/0x70
 [<c0102e77>] syscall_call+0x7/0xb
Code: fe ff ff 8b b3 ec 00 00 00 58 85 f6 5a 75 12 57 e8 7c ff ff ff 8d 65 f4 5
EIP: [<c03d958a>] __ip_select_ident+0x4a/0xa0 SS:ESP 0068:c05f7e64
 <0>Kernel panic - not syncing: Fatal exception in interrupt
 <3>Slab corruption: start=c6403564, len=2048
Redzone: 0x6b6b6b6b/0xc03c0543.
Last user: [<00000000>](0x0)
7f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 71 f0 2c 5a
Prev obj: start=c6402cd3, len=2048
Redzone: 0x6b6b6b6b/0x6b6b6b6b.
Last user: [<6b6b6b6b>](0x6b6b6b6b)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
slab error in cache_alloc_debugcheck_after(): cache `size-2048': double free, on
 [<c01034b9>] show_trace+0x19/0x20
 [<c01035ba>] dump_stack+0x1a/0x20
 [<c0160d81>] __slab_error+0x21/0x30
 [<c0162e11>] cache_alloc_debugcheck_after+0x121/0x1a0
 [<c01634c8>] __kmalloc_track_caller+0xa8/0x100
 [<c03c029d>] __alloc_skb+0x4d/0x110
 [<c030438b>] rhine_rx+0x29b/0x490
 [<c0303db3>] rhine_interrupt+0x193/0x240
 [<c0144807>] handle_IRQ_event+0x27/0x70
 [<c01448d3>] __do_IRQ+0x83/0x110
 [<c0104c53>] do_IRQ+0x63/0xb0
 =======================
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e1dd>] __delay+0xd/0x10
 [<c028e205>] __const_udelay+0x25/0x30
 [<c0117ce8>] panic+0xf8/0x100
 [<c0103a21>] die+0x201/0x210
 [<c010eef3>] do_page_fault+0x173/0x580
 [<c0103199>] error_code+0x39/0x40
 [<c03e0df8>] ip_queue_xmit+0x468/0x520
 [<c03f26df>] tcp_transmit_skb+0x27f/0x4b0
 [<c03f4a93>] tcp_retransmit_skb+0x153/0x2d0
 [<c03f66af>] tcp_retransmit_timer+0xdf/0x3f0
 [<c03f6a91>] tcp_write_timer+0xd1/0x100
 [<c0122154>] run_timer_softirq+0xb4/0x1a0
 [<c011d68f>] __do_softirq+0x6f/0x100
 [<c0104de7>] do_softirq+0x87/0xe0
 =======================
 [<c011d773>] irq_exit+0x53/0x60
 [<c0104c5a>] do_IRQ+0x6a/0xb0
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e30b>] memcpy+0x3b/0x50
 [<c028e378>] memmove+0x38/0x50
 [<c01bf9cd>] leaf_paste_in_buffer+0x7d/0x320
 [<c01a879c>] balance_leaf+0x24c/0x27d0
 [<c01ab050>] do_balance+0x60/0xf0
 [<c01c5854>] reiserfs_paste_into_item+0x164/0x190
 [<c01b3c25>] reiserfs_allocate_blocks_for_region+0x925/0x12e0
 [<c01b5c9c>] reiserfs_file_write+0x72c/0x7c0
 [<c01668d8>] vfs_write+0x88/0x170
 [<c0166a6c>] sys_write+0x3c/0x70
 [<c0102e77>] syscall_call+0x7/0xb
c6403560: redzone 1:0x6b6b6b6b, redzone 2:0xc03c0543
Slab corruption: start=c6402d58, len=2048
Redzone: 0x6b6b6b6b/0x0.
Last user: [<5a2cf071>](0x5a2cf071)
7f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 71 f0 2c 5a
Prev obj: start=c64024c7, len=2048
Redzone: 0x656c7564/0x6b6b6b6b.
Last user: [<6b6b6b6b>](0x6b6b6b6b)
000: 3d 63 6f 6d 6d 75 6e 69 74 79 26 61 63 74 69 6f
010: 6e 3d 76 69 65 77 5f 74 6f 70 69 63 26 74 6f 70
slab error in cache_alloc_debugcheck_after(): cache `size-2048': double free, on
 [<c01034b9>] show_trace+0x19/0x20
 [<c01035ba>] dump_stack+0x1a/0x20
 [<c0160d81>] __slab_error+0x21/0x30
 [<c0162e11>] cache_alloc_debugcheck_after+0x121/0x1a0
 [<c01634c8>] __kmalloc_track_caller+0xa8/0x100
 [<c03c029d>] __alloc_skb+0x4d/0x110
 [<c030438b>] rhine_rx+0x29b/0x490
 [<c0303db3>] rhine_interrupt+0x193/0x240
 [<c0144807>] handle_IRQ_event+0x27/0x70
 [<c01448d3>] __do_IRQ+0x83/0x110
 [<c0104c53>] do_IRQ+0x63/0xb0
 =======================
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e1dd>] __delay+0xd/0x10
 [<c028e205>] __const_udelay+0x25/0x30
 [<c0117ce8>] panic+0xf8/0x100
 [<c0103a21>] die+0x201/0x210
 [<c010eef3>] do_page_fault+0x173/0x580
 [<c0103199>] error_code+0x39/0x40
 [<c03e0df8>] ip_queue_xmit+0x468/0x520
 [<c03f26df>] tcp_transmit_skb+0x27f/0x4b0
 [<c03f4a93>] tcp_retransmit_skb+0x153/0x2d0
 [<c03f66af>] tcp_retransmit_timer+0xdf/0x3f0
 [<c03f6a91>] tcp_write_timer+0xd1/0x100
 [<c0122154>] run_timer_softirq+0xb4/0x1a0
 [<c011d68f>] __do_softirq+0x6f/0x100
 [<c0104de7>] do_softirq+0x87/0xe0
 =======================
 [<c011d773>] irq_exit+0x53/0x60
 [<c0104c5a>] do_IRQ+0x6a/0xb0
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e30b>] memcpy+0x3b/0x50
 [<c028e378>] memmove+0x38/0x50
 [<c01bf9cd>] leaf_paste_in_buffer+0x7d/0x320
 [<c01a879c>] balance_leaf+0x24c/0x27d0
 [<c01ab050>] do_balance+0x60/0xf0
 [<c01c5854>] reiserfs_paste_into_item+0x164/0x190
 [<c01b3c25>] reiserfs_allocate_blocks_for_region+0x925/0x12e0
 [<c01b5c9c>] reiserfs_file_write+0x72c/0x7c0
 [<c01668d8>] vfs_write+0x88/0x170
 [<c0166a6c>] sys_write+0x3c/0x70
 [<c0102e77>] syscall_call+0x7/0xb
c6402d54: redzone 1:0x6b6b6b6b, redzone 2:0x0
Slab corruption: start=c640254c, len=2048
Redzone: 0x6b6b6b6b/0x0.
Last user: [<5a2cf071>](0x5a2cf071)
7f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 71 f0 2c 5a
Prev obj: start=c6401cbb, len=2048
Redzone: 0x19a60cb7/0x68702e78.
Last user: [<6f6d3f70>](0x6f6d3f70)
000: b7 f8 a5 19 b7 00 13 00 00 f4 90 48 08 7c a4 19
010: b7 70 a4 19 b7 01 00 00 00 00 13 00 00 01 00 00
slab error in cache_alloc_debugcheck_after(): cache `size-2048': double free, on
 [<c01034b9>] show_trace+0x19/0x20
 [<c01035ba>] dump_stack+0x1a/0x20
 [<c0160d81>] __slab_error+0x21/0x30
 [<c0162e11>] cache_alloc_debugcheck_after+0x121/0x1a0
 [<c01634c8>] __kmalloc_track_caller+0xa8/0x100
 [<c03c029d>] __alloc_skb+0x4d/0x110
 [<c030438b>] rhine_rx+0x29b/0x490
 [<c0303db3>] rhine_interrupt+0x193/0x240
 [<c0144807>] handle_IRQ_event+0x27/0x70
 [<c01448d3>] __do_IRQ+0x83/0x110
 [<c0104c53>] do_IRQ+0x63/0xb0
 =======================
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e1dd>] __delay+0xd/0x10
 [<c028e205>] __const_udelay+0x25/0x30
 [<c0117ce8>] panic+0xf8/0x100
 [<c0103a21>] die+0x201/0x210
 [<c010eef3>] do_page_fault+0x173/0x580
 [<c0103199>] error_code+0x39/0x40
 [<c03e0df8>] ip_queue_xmit+0x468/0x520
 [<c03f26df>] tcp_transmit_skb+0x27f/0x4b0
 [<c03f4a93>] tcp_retransmit_skb+0x153/0x2d0
 [<c03f66af>] tcp_retransmit_timer+0xdf/0x3f0
 [<c03f6a91>] tcp_write_timer+0xd1/0x100
 [<c0122154>] run_timer_softirq+0xb4/0x1a0
 [<c011d68f>] __do_softirq+0x6f/0x100
 [<c0104de7>] do_softirq+0x87/0xe0
 =======================
 [<c011d773>] irq_exit+0x53/0x60
 [<c0104c5a>] do_IRQ+0x6a/0xb0
 [<c0103145>] common_interrupt+0x25/0x30
 [<c028e30b>] memcpy+0x3b/0x50
 [<c028e378>] memmove+0x38/0x50
 [<c01bf9cd>] leaf_paste_in_buffer+0x7d/0x320
 [<c01a879c>] balance_leaf+0x24c/0x27d0
 [<c01ab050>] do_balance+0x60/0xf0
 [<c01c5854>] reiserfs_paste_into_item+0x164/0x190
 [<c01b3c25>] reiserfs_allocate_blocks_for_region+0x925/0x12e0
 [<c01b5c9c>] reiserfs_file_write+0x72c/0x7c0
 [<c01668d8>] vfs_write+0x88/0x170
 [<c0166a6c>] sys_write+0x3c/0x70
 [<c0102e77>] syscall_call+0x7/0xb
c6402548: redzone 1:0x6b6b6b6b, redzone 2:0x0