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Date: Thu, 12 Oct 2006 20:42:44 +0200 From: Ingo Molnar <mingo@...e.hu> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: linux-kernel <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org> Subject: Re: [PATCH] rt-mutex: fixup rt-mutex debug code * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote: > BUG: warning at kernel/rtmutex-debug.c:125/rt_mutex_debug_task_free() (Not tainted) > [<c04051e3>] show_trace_log_lvl+0x58/0x16a > [<c04057f0>] show_trace+0xd/0x10 > [<c0405900>] dump_stack+0x19/0x1b > [<c043f03d>] rt_mutex_debug_task_free+0x35/0x6a > [<c04224c0>] free_task+0x15/0x24 > [<c042378c>] copy_process+0x12bd/0x1324 > [<c0423835>] do_fork+0x42/0x113 > [<c04021dd>] sys_fork+0x19/0x1b > [<c0403fb7>] syscall_call+0x7/0xb > > In copy_process(), dup_task_struct() also duplicates the ->pi_lock, > ->pi_waiters and ->pi_blocked_on members. rt_mutex_debug_task_free() > called from free_task() validates these members. However free_task() > can be invoked before these members are reset for the new task. > > Move the initialization code before the first bail that can hit > free_task(). > > Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl> thanks for tracking this one down! Acked-by: Ingo Molnar <mingo@...e.hu> Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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