Messages in this thread | | | Date | Thu, 12 Oct 2006 20:42:44 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] rt-mutex: fixup rt-mutex debug code |
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* Peter Zijlstra <a.p.zijlstra@chello.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@chello.nl>
thanks for tracking this one down!
Acked-by: Ingo Molnar <mingo@elte.hu>
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