Messages in this thread | | | Date | Mon, 8 Nov 2010 13:08:41 -0800 | From | "Paul E. McKenney" <> | Subject | Re: 2.6.36-git11 -- kernel/pid.c:419 invoked rcu_dereference_check() without protection! |
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On Mon, Nov 08, 2010 at 04:00:51PM -0500, Miles Lane wrote: > Great! Works here. :-)
Thank you for testing it, Miles!
Thanx, Paul
> On Sun, Nov 7, 2010 at 1:47 PM, Paul E. McKenney > <paulmck@linux.vnet.ibm.com> wrote: > > On Fri, Oct 29, 2010 at 01:22:28AM -0400, Miles Lane wrote: > >> [ INFO: suspicious rcu_dereference_check() usage. ] > >> --------------------------------------------------- > >> kernel/pid.c:419 invoked rcu_dereference_check() without protection! > >> > >> other info that might help us debug this: > >> > >> > >> rcu_scheduler_active = 1, debug_locks = 1 > >> 1 lock held by ureadahead/943: > >> #0: (tasklist_lock){.+.+..}, at: [<ffffffff810ec497>] > >> sys_ioprio_set+0x8e/0x2aa > >> > >> stack backtrace: > >> Pid: 943, comm: ureadahead Not tainted 2.6.36-git11 #8 > >> Call Trace: > >> [<ffffffff8105d335>] lockdep_rcu_dereference+0x9d/0xa5 > >> [<ffffffff8104c825>] find_task_by_pid_ns+0x3f/0x58 > >> [<ffffffff8104c85b>] find_task_by_vpid+0x1d/0x1f > >> [<ffffffff810ec4c6>] sys_ioprio_set+0xbd/0x2aa > >> [<ffffffff813547a3>] ? trace_hardirqs_on_thunk+0x3a/0x3f > >> [<ffffffff81002aab>] system_call_fastpath+0x16/0x1b > > > > Could you please try the patch from Sergey Senozhatsky, currently > > in -mm, that may be found at http://lkml.org/lkml/2010/10/29/168? > > > > Thanx, Paul > > -- 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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