FAULT_FLAG_ALLOW_RETRY missing 30 audit: type=1326 audit(1525314892.265:7306): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=2083 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=228 compat=0 ip=0x45879a code=0x0 audit: type=1326 audit(1525314892.265:7307): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=2083 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x455979 code=0x0 CPU: 0 PID: 2089 Comm: syz-executor6 Not tainted 4.17.0-rc3+ #29 INFO: task kworker/0:3:2105 blocked for more than 120 seconds. Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 handle_userfault.cold.32+0x44/0x5a fs/userfaultfd.c:430 Not tainted 4.17.0-rc3+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D 19800 2105 2 0x80000000 Workqueue: events cgwb_release_workfn Call Trace: context_switch kernel/sched/core.c:2848 [inline] __schedule+0x801/0x1e30 kernel/sched/core.c:3490 do_anonymous_page mm/memory.c:3147 [inline] handle_pte_fault mm/memory.c:3961 [inline] __handle_mm_fault+0x38d8/0x4310 mm/memory.c:4087 handle_mm_fault+0x53a/0xc70 mm/memory.c:4124 __do_page_fault+0x60b/0xe40 arch/x86/mm/fault.c:1399 schedule+0xef/0x430 kernel/sched/core.c:3549 do_page_fault+0xee/0x8a7 arch/x86/mm/fault.c:1474 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 RSP: 0018:ffff8801afe5f558 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000000000e8 RCX: 00000000000000e8 RDX: 00000000000000e8 RSI: 0000000020012f18 RDI: ffff8801d8b77cc0 RBP: ffff8801afe5f590 R08: ffffed003b16efb5 R09: ffffed003b16efb5 R10: ffffed003b16efb4 R11: ffff8801d8b77da7 R12: 0000000020013000 R13: 0000000020012f18 R14: ffff8801d8b77cc0 R15: 00007ffffffff000 copy_from_user include/linux/uaccess.h:147 [inline] memdup_user+0x54/0xa0 mm/util.c:164 xfrm_user_policy+0x1c0/0xae0 net/xfrm/xfrm_state.c:2074 bit_wait+0x18/0x90 kernel/sched/wait_bit.c:197 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48 do_ip_setsockopt.isra.13+0x1d87/0x3e50 net/ipv4/ip_sockglue.c:1159 out_of_line_wait_on_bit+0x204/0x3a0 kernel/sched/wait_bit.c:63 wait_on_bit include/linux/wait_bit.h:76 [inline] wb_shutdown+0x370/0x470 mm/backing-dev.c:366 ip_setsockopt+0x47/0xf0 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt+0x93/0xe0 net/ipv4/tcp.c:2890 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3039 __sys_setsockopt+0x1bd/0x390 net/socket.c:1903 cgwb_release_workfn+0x87/0x750 mm/backing-dev.c:509 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145 RIP: 0033:0x455979 RSP: 002b:00007f1ceb88ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f1ceb88f6d4 RCX: 0000000000455979 RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 00000000000000e8 R09: 0000000000000000 R10: 0000000020012f18 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000005b4 R14: 00000000006fc980 R15: 0000000000000000 IPVS: set_ctl: invalid protocol: 44 172.20.20.170:20000 sed IPVS: set_ctl: invalid protocol: 44 172.20.20.170:20000 sed worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Showing all locks held in the system: 2 locks held by khungtaskd/893: #0: 00000000e02ae6e4 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: 00000000e02ae6e4 (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249 #1: 000000000b2bc01d (tasklist_lock){.+.+}, at: debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470 2 locks held by kworker/0:3/2105: #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:215 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:57 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000ce57c193 ((wq_completion)"events"){+.+.}, at: process_one_work+0xaef/0x1b50 kernel/workqueue.c:2116 #1: 00000000ab087552 ((work_completion)(&wb->release_work)){+.+.}, at: process_one_work+0xb46/0x1b50 kernel/workqueue.c:2120 2 locks held by getty/4460: #0: 000000009378d1d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000cf66612c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4461: #0: 0000000045db1e4a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000c7b0e88a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4462: #0: 00000000207b5fcb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000933b9fde (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4463: #0: 0000000058b80ec8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000007989aa5d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4464: #0: 00000000c55c161c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000061776a13 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4465: #0: 00000000fd32d24d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000b4a385c3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4466: #0: 00000000d4d02f8f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000002a1013bc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by kworker/0:5/19399: #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: __write_once_size include/linux/compiler.h:215 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:57 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000006a774790 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0xaef/0x1b50 kernel/workqueue.c:2116 #1: 0000000086cb501b ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0xb46/0x1b50 kernel/workqueue.c:2120 1 lock held by syz-executor0/2116: #0: 00000000e9ce86a3 (rcu_sched_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:281 [inline] #0: 00000000e9ce86a3 (rcu_sched_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited.constprop.73+0x9dd/0xad0 kernel/rcu/tree_exp.h:616 1 lock held by syz-executor1/2177: #0: 00000000392c6156 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:235 3 locks held by syz-executor4/2182: #0: 00000000e3109d66 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x129f/0x2fa0 kernel/events/core.c:10475 #1: 0000000034650357 (&pmus_srcu){....}, at: perf_event_alloc.part.91+0xfa4/0x3090 kernel/events/core.c:10034 #2: 00000000392c6156 (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:217 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 893 Comm: khungtaskd Not tainted 4.17.0-rc3+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0xc10/0xf60 kernel/hung_task.c:249 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4537 Comm: syz-executor1 Not tainted 4.17.0-rc3+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:accumulate_sum kernel/sched/fair.c:3146 [inline] RIP: 0010:___update_load_sum kernel/sched/fair.c:3226 [inline] RIP: 0010:__update_load_avg_cfs_rq.isra.35+0x18c/0x590 kernel/sched/fair.c:3332 RSP: 0018:ffff8801943aeed0 EFLAGS: 00000006 RAX: 0000000000000014 RBX: ffff8801dae2c740 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff8801dae2c7d0 RDI: ffff8801dae2c7d0 RBP: ffff8801943aef08 R08: 000000000000022a R09: 0000000000000001 R10: 00000000000001f2 R11: 0000000000000001 R12: 000000000000023e R13: 00000000000168b4 R14: 0000000000001209 R15: 0000000000000000 FS: 00000000012ad940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa4b683aa20 CR3: 0000000194263000 CR4: 00000000001426f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: update_cfs_rq_load_avg kernel/sched/fair.c:3708 [inline] update_load_avg+0x2d9/0x2570 kernel/sched/fair.c:3809 dequeue_entity+0xe1/0x15c0 kernel/sched/fair.c:4269 dequeue_task_fair+0xea/0x9c0 kernel/sched/fair.c:5419 dequeue_task kernel/sched/core.c:757 [inline] deactivate_task+0xf3/0x330 kernel/sched/core.c:773 __schedule+0x939/0x1e30 kernel/sched/core.c:3440 schedule+0xef/0x430 kernel/sched/core.c:3549 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x20b/0x730 kernel/time/hrtimer.c:1689 hrtimer_nanosleep+0x2cc/0x610 kernel/time/hrtimer.c:1743 __do_sys_nanosleep kernel/time/hrtimer.c:1775 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1762 [inline] __x64_sys_nanosleep+0x1df/0x270 kernel/time/hrtimer.c:1762 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x481080 RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000000032d RCX: 0000000000481080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3eaa0 RBP: 000000000007864a R08: 0000000000000001 R09: 00000000012ad940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000009 R14: 0000000000000b2a R15: 00000000000785f2 Code: 00 0f 85 e7 03 00 00 4c 0f af e8 4c 01 ab 88 00 00 00 4d 85 f6 74 2d 48 8d bb 90 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 fe <48> c1 ee 03 80 3c 16 00 0f 85 cf 03 00 00 4c 0f af f0 4c 01 b3