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On Tue, 2006-05-30 at 23:07 +0200, Laurent Riffard wrote: > 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 hmmm skb_dequeue is called in a hard irq... > {hardirq-on-W} state was registered at: > [<c012d2a1>] lockdep_acquire+0x56/0x6f > [<c029595b>] _spin_lock_bh+0x1c/0x29 > [<c02922e0>] unix_stream_connect+0x2d8/0x3a7 .. yet it was taken only with spin_lock_bh() in unix_stream_connect, leaving interrupts enabled (and thus not allowing use inside a hard irq) > [<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] yet hpsb_bus_reset() calls skb_dequeue (indirectly, via the inlined abort_requests() function) in a hard irq. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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