Got this on a box that had been fuzzing for 12 hours or so. There's also some timer stuff going on htere, so cc'ing the usual suspects. Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 3 CPU: 3 PID: 16759 Comm: trinity-c25 Not tainted 3.17.0-rc6+ #59 0000000000000000 00000000ff743b71 ffff880244e06c00 ffffffffa1818ac4 ffffffffa1c633c0 ffff880244e06c80 ffffffffa18130a3 ffff880200000010 ffff880244e06c90 ffff880244e06c30 00000000ff743b71 ffffffffa117ead5 Call Trace: <NMI> [<ffffffffa1818ac4>] dump_stack+0x4e/0x7a [<ffffffffa18130a3>] panic+0xd7/0x20a [<ffffffffa117ead5>] ? __perf_event_header__init_id+0xe5/0xf0 [<ffffffffa1146220>] ? restart_watchdog_hrtimer+0x50/0x50 [<ffffffffa1146338>] watchdog_overflow_callback+0x118/0x120 [<ffffffffa118792c>] __perf_event_overflow+0xac/0x350 [<ffffffffa1019ece>] ? x86_perf_event_set_period+0xde/0x150 [<ffffffffa1188844>] perf_event_overflow+0x14/0x20 [<ffffffffa101fc26>] intel_pmu_handle_irq+0x206/0x410 [<ffffffffa1018d2b>] perf_event_nmi_handler+0x2b/0x50 [<ffffffffa1007752>] nmi_handle+0xd2/0x3b0 [<ffffffffa1007685>] ? nmi_handle+0x5/0x3b0 [<ffffffffa10d103d>] ? lock_release+0x1d/0x300 [<ffffffffa1007c62>] default_do_nmi+0x72/0x1c0 [<ffffffffa1007e68>] do_nmi+0xb8/0xf0 [<ffffffffa18268aa>] end_repeat_nmi+0x1e/0x2e [<ffffffffa10f95f8>] ? hrtimer_try_to_cancel+0x58/0x1f0 [<ffffffffa10d103d>] ? lock_release+0x1d/0x300 [<ffffffffa10d103d>] ? lock_release+0x1d/0x300 [<ffffffffa10f95f8>] ? hrtimer_try_to_cancel+0x58/0x1f0 [<ffffffffa10d103d>] ? lock_release+0x1d/0x300 <<EOE>> <IRQ> [<ffffffffa1823ac4>] _raw_spin_unlock_irqrestore+0x24/0x70 [<ffffffffa10f95f8>] hrtimer_try_to_cancel+0x58/0x1f0 [<ffffffffa10f97aa>] hrtimer_cancel+0x1a/0x30 [<ffffffffa110a0e7>] tick_nohz_restart+0x17/0x90 [<ffffffffa110af38>] __tick_nohz_full_check+0xc8/0xe0 [<ffffffffa110af5e>] nohz_full_kick_work_func+0xe/0x10 [<ffffffffa117c9bf>] irq_work_run_list+0x4f/0x70 [<ffffffffa117ca0a>] irq_work_run+0x2a/0x60 [<ffffffffa10f82eb>] update_process_times+0x5b/0x70 [<ffffffffa1109dc5>] tick_sched_handle.isra.21+0x25/0x60 [<ffffffffa110a0b1>] tick_sched_timer+0x41/0x60 [<ffffffffa10f8c71>] __run_hrtimer+0x81/0x480 [<ffffffffa110a070>] ? tick_sched_do_timer+0x90/0x90 [<ffffffffa10f9b27>] hrtimer_interrupt+0x107/0x260 [<ffffffffa10331a4>] local_apic_timer_interrupt+0x34/0x60 [<ffffffffa182734f>] smp_apic_timer_interrupt+0x3f/0x60 [<ffffffffa182576f>] apic_timer_interrupt+0x6f/0x80 <EOI> [<ffffffffa1823b42>] ? _raw_spin_unlock_irq+0x32/0x60 [<ffffffffa11a795b>] shrink_inactive_list+0x1cb/0x620 [<ffffffffa11a8663>] shrink_lruvec+0x563/0x6b0 [<ffffffffa119720f>] ? zone_watermark_ok+0x1f/0x30 [<ffffffffa11a87fe>] shrink_zone+0x4e/0x130 [<ffffffffa11a905f>] shrink_zones.constprop.63+0x20f/0x410 [<ffffffffa11a93bb>] try_to_free_pages+0x15b/0x3e0 [<ffffffffa119bacb>] __alloc_pages_nodemask+0x7eb/0xc20 [<ffffffffa11e3756>] alloc_pages_current+0x106/0x1e0 [<ffffffffa11ec905>] ? new_slab+0x2b5/0x390 [<ffffffffa11ec905>] new_slab+0x2b5/0x390 [<ffffffffa1817152>] __slab_alloc+0x348/0x56f [<ffffffffa11f2116>] ? kmem_cache_alloc+0x256/0x330 [<ffffffffa16b31dd>] ? sock_alloc_inode+0x1d/0xc0 [<ffffffffa10cb687>] ? __lock_is_held+0x57/0x80 [<ffffffffa16b31dd>] ? sock_alloc_inode+0x1d/0xc0 [<ffffffffa11f2116>] kmem_cache_alloc+0x256/0x330 [<ffffffffa16b31dd>] sock_alloc_inode+0x1d/0xc0 [<ffffffffa1223c4d>] alloc_inode+0x1d/0xa0 [<ffffffffa1225df1>] new_inode_pseudo+0x11/0x60 [<ffffffffa16b2dac>] sock_alloc+0x1c/0x90 [<ffffffffa16b3c4d>] sock_create_lite+0x4d/0x90 [<ffffffffa1709d71>] __netlink_kernel_create+0x71/0x280 [<ffffffffa16ed337>] diag_net_init+0x47/0x80 [<ffffffffa16ed2b0>] ? diag_net_exit+0x30/0x30 [<ffffffffa16c85f1>] ops_init+0x41/0x190 [<ffffffffa16c87c3>] setup_net+0x83/0x140 [<ffffffffa16c8d7e>] copy_net_ns+0x7e/0x130 [<ffffffffa109f279>] create_new_namespaces+0xf9/0x190 [<ffffffffa109f5fa>] unshare_nsproxy_namespaces+0x5a/0xc0 [<ffffffffa1077883>] SyS_unshare+0x173/0x330 [<ffffffffa1824a24>] tracesys+0xdd/0xe2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>