Le 30.05.2006 11:29, Andrew Morton a écrit :
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc5/2.6.17-rc5-mm1/
> ...
>  Runtime locking validation.

============================
[ BUG: illegal lock usage! ]
----------------------------
illegal {hardirq-on-W} -> {in-hardirq-W} usage.
events/0/4 [HC1[1]:SC0[0]:HE0:SE1] takes:
 (&list->lock){+...}, at: [<c0247689>] skb_dequeue+0x12/0x43
{hardirq-on-W} state was registered at:
  [<c012d2a1>] lockdep_acquire+0x56/0x6f
  [<c029595b>] _spin_lock_bh+0x1c/0x29
  [<c02922e0>] unix_stream_connect+0x2d8/0x3a7
  [<c0243fb4>] sys_connect+0x54/0x71
  [<c0244c5c>] sys_socketcall+0x6f/0x166
  [<c0295afd>] sysenter_past_esp+0x56/0x8d
irq event stamp: 1886
hardirqs last  enabled at (1885): [<c0295a2b>] _spin_unlock_irqrestore+0x35/0x3b
hardirqs last disabled at (1886): [<c01032fb>] common_interrupt+0x1b/0x2c
softirqs last  enabled at (0): [<c0114af0>] copy_process+0x265/0x11dc
softirqs last disabled at (0): [<00000000>] init+0x3feffde0/0x1da

other info that might help us debug this:
no locks held by events/0/4.

stack backtrace:
 [<c0103810>] show_trace_log_lvl+0x4b/0xf4
 [<c0103e11>] show_trace+0xd/0x10
 [<c0103e58>] dump_stack+0x19/0x1b
 [<c012b8be>] print_usage_bug+0x1a4/0x1ae
 [<c012c3c6>] mark_lock+0x8a/0x411
 [<c012cc55>] __lockdep_acquire+0x302/0x8f8
 [<c012d2a1>] lockdep_acquire+0x56/0x6f
 [<c0295906>] _spin_lock_irqsave+0x20/0x2f
 [<c0247689>] skb_dequeue+0x12/0x43
 [<e0bdb7ac>] hpsb_bus_reset+0x55/0xa2 [ieee1394]
 [<e0853e72>] ohci_irq_handler+0x322/0x6c9 [ohci1394]
 [<c0138d8c>] handle_IRQ_event+0x20/0x50
 [<c0139d38>] handle_level_irq+0x71/0xb9
 [<c0104ded>] do_IRQ+0x81/0xa8
 [<c0103305>] common_interrupt+0x25/0x2c
ieee1394: Host added: ID:BUS[0-00:1023]  GUID[00308d0120e085ca]

.config and dmesg attached.

regards
~~
laurent