INFO: task syz-executor.2:31258 can't die for more than 143 seconds. syz-executor.2 R running task 24536 31258 13553 0x00004006 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4128 retint_kernel+0x1b/0x2b RIP: 0010:__cpuset_node_allowed+0xa8/0x5c0 kernel/cgroup/cpuset.c:3337 Code: 00 00 00 4a 8d bc 38 b8 10 00 00 48 89 45 d0 e8 3e ec 3d 00 49 0f a3 9f b8 10 00 00 41 0f 92 c4 31 ff 44 89 e6 e8 28 d3 03 00 <45> 84 e4 75 8d e8 de d1 03 00 49 8d bf 18 07 00 00 48 b8 00 00 00 RSP: 0018:ffff888092287558 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff816ede38 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff888092287590 R08: ffff888080b32480 R09: ffffed10101666a8 R10: ffffed10101666a7 R11: ffff888080b3353f R12: 0000000000000001 R13: 0000000000112cc0 R14: 0000000000000000 R15: ffff888080b32480 __cpuset_zone_allowed include/linux/cpuset.h:76 [inline] cpuset_zone_allowed include/linux/cpuset.h:82 [inline] cpuset_zone_allowed include/linux/cpuset.h:79 [inline] wakeup_kswapd+0x24f/0x6a0 mm/vmscan.c:3967 wake_all_kswapds+0x14d/0x300 mm/page_alloc.c:4171 __alloc_pages_slowpath+0x1907/0x2520 mm/page_alloc.c:4442 __alloc_pages_nodemask+0x62e/0x8f0 mm/page_alloc.c:4745 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2189 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x2a2/0x480 mm/filemap.c:972 __do_page_cache_readahead+0x1c9/0x5d0 mm/readahead.c:196 ra_submit mm/internal.h:62 [inline] do_sync_mmap_readahead mm/filemap.c:2463 [inline] filemap_fault+0x1389/0x2840 mm/filemap.c:2549 __do_fault+0x111/0x540 mm/memory.c:3087 do_shared_fault mm/memory.c:3539 [inline] do_fault mm/memory.c:3617 [inline] handle_pte_fault mm/memory.c:3844 [inline] __handle_mm_fault+0x2ae5/0x3f20 mm/memory.c:3968 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4005 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xdd0 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1200 RIP: 0033:0x4006c4 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RSP: 002b:00007ffd5638fbf0 EFLAGS: 00010206 RAX: 0000000020000140 RBX: 0000000000000000 RCX: 0000000020001540 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000140 RBP: 0000000000760f08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000439100 R11: 0000000000000012 R12: 00000000004c5c44 R13: 000000000000012c R14: 0000000000760f10 R15: fffffffffffffffe INFO: task syz-executor.2:31259 can't die for more than 144 seconds. syz-executor.2 R running task 20248 31259 13553 0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1054: #0: 0000000071cbfa10 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5257 1 lock held by kswapd1/1784: 1 lock held by udevd/3904: 1 lock held by rsyslogd/8871: #0: 00000000c859b82c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/8961: #0: 0000000093c39b6f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000926369e7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8962: #0: 0000000098f152c2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000453e18f7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8963: #0: 0000000090551795 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000053b31c3a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8964: #0: 000000001bd7254f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d85e5a3c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8965: #0: 00000000dce185a8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ef4b9efc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8966: #0: 0000000074ebd760 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e52a6eb5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8967: #0: 000000004f5e98f2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007c8c32bf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/31259: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1054 Comm: khungtaskd Not tainted 5.3.0-rc1-next-20190724 #50 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:249 [inline] watchdog+0xc54/0x1320 kernel/hung_task.c:333 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26788 Comm: kworker/0:1 Not tainted 5.3.0-rc1-next-20190724 #50 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker RIP: 0010:hlock_class kernel/locking/lockdep.c:158 [inline] RIP: 0010:mark_lock+0x72/0x11e0 kernel/locking/lockdep.c:3568 Code: 8b 1d c2 5a 32 09 85 db 0f 84 c9 00 00 00 45 31 ff 48 83 c4 28 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8d 46 20 41 89 d4 <49> 89 f5 48 89 c2 48 89 45 c8 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffff8880572a7b50 EFLAGS: 00000093 RAX: ffff888090494ca0 RBX: 0000000000000001 RCX: 0000000000000006 RDX: 0000000000000006 RSI: ffff888090494c80 RDI: ffff8880904943c0 RBP: ffff8880572a7ba0 R08: 1ffffffff14a8147 R09: fffffbfff14a8148 R10: fffffbfff14a8147 R11: ffffffff8a540a3f R12: 0000000000000006 R13: ffff8880904943c0 R14: dffffc0000000000 R15: ffff888090494c58 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa68fda9c50 CR3: 0000000080271000 CR4: 00000000001406f0 Call Trace: mark_held_locks+0xa4/0xf0 kernel/locking/lockdep.c:3285 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3314 [inline] lockdep_hardirqs_on+0x418/0x5d0 kernel/locking/lockdep.c:3359 trace_hardirqs_on+0x67/0x240 kernel/trace/trace_preemptirq.c:31 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:305 [inline] gc_worker+0xa65/0xde0 net/netfilter/nf_conntrack_core.c:1248 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352