* suspicious rcu_dereference_check in post_schedule.
@ 2011-05-23 22:28 Dave Jones
0 siblings, 0 replies; only message in thread
From: Dave Jones @ 2011-05-23 22:28 UTC (permalink / raw)
To: Linux Kernel; +Cc: mingo
just noticed this on a build of Linus' tree from sometime yesterday.
Dave
===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
kernel/sched_rt.c:1266 invoked rcu_dereference_check() without protection!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
1 lock held by watchdog/0/12:
#0: (&rq->lock){-.-.-.}, at: [<ffffffff8104c460>] post_schedule.part.25+0x14/0x4a
stack backtrace:
Pid: 12, comm: watchdog/0 Not tainted 2.6.39+ #43
Call Trace:
[<ffffffff8108c376>] lockdep_rcu_dereference+0xa7/0xaf
[<ffffffff8104b7ee>] find_lowest_rq+0x11b/0x19a
[<ffffffff81055667>] push_rt_task.part.69+0x7b/0x1d2
[<ffffffff810558cc>] post_schedule_rt+0x1f/0x27
[<ffffffff8104c47c>] post_schedule.part.25+0x30/0x4a
[<ffffffff814c8ac9>] schedule+0x76e/0x7ca
[<ffffffff810bf0af>] ? watchdog_enable+0x194/0x194
[<ffffffff810bf0af>] ? watchdog_enable+0x194/0x194
[<ffffffff810bf122>] watchdog+0x73/0xb6
[<ffffffff810793e9>] kthread+0xa8/0xb0
[<ffffffff814ce230>] ? sub_preempt_count+0xa1/0xb4
[<ffffffff814d24a4>] kernel_thread_helper+0x4/0x10
[<ffffffff814cb698>] ? retint_restore_args+0x13/0x13
[<ffffffff81079341>] ? __init_kthread_worker+0x5a/0x5a
[<ffffffff814d24a0>] ? gs_change+0x13/0x13
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2011-05-23 22:28 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-05-23 22:28 suspicious rcu_dereference_check in post_schedule Dave Jones
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.