[31288] 0 31288 18244 8750 27 3 0 1000 syz-executor.0 [31319] 0 31319 18178 8746 26 3 0 1000 syz-executor.0 [31380] 0 31380 18178 8746 26 3 0 1000 syz-executor.0 [31414] 0 31414 18178 13294 32 3 0 0 syz-executor.1 INFO: task syz-executor.4:3824 blocked for more than 140 seconds. Not tainted 4.14.125+ #4 [31431] 0 31431 18178 8989 26 4 0 1000 syz-executor.4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [31436] 0 31436 18178 8746 26 3 0 1000 syz-executor.0 [31447] 0 31447 18211 13296 32 3 0 0 syz-executor.1 syz-executor.4 D29728 3824 28456 0x10000004 Call Trace: [31505] 0 31505 18145 8966 26 4 0 1000 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3498 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [31734] 0 31734 18178 8990 26 4 0 1000 syz-executor.4 [31752] 0 31752 18244 8999 26 4 0 0 syz-executor.5 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1462 [inline] packet_setsockopt+0xff9/0x2720 net/packet/af_packet.c:3750 [31909] 0 31909 18211 8975 27 4 0 1000 syz-executor.2 [31953] 0 31953 18145 8747 26 3 0 0 syz-executor.5 [31958] 0 31958 18178 8749 26 3 0 0 syz-executor.5 [31979] 0 31979 18208 8992 26 4 0 1000 syz-executor.4 [31984] 0 31984 18208 8992 26 4 0 1000 syz-executor.4 [32012] 0 32012 18176 13201 33 3 0 1000 syz-executor.0 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [<00000000d81aeae7>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1772: #0: (&tty->ldisc_sem){++++}, at: [<00000000ae6d4cbb>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000007b1579d6>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 ============================================= [32174] 0 32174 18211 8971 27 4 0 1000 syz-executor.2 [32219] 0 32219 18211 8971 27 4 0 1000 syz-executor.2 [32416] 0 32416 18178 8748 25 3 0 0 syz-executor.5 [32449] 0 32449 18244 8753 25 3 0 0 syz-executor.5 [32542] 0 32542 18211 8990 26 4 0 1000 syz-executor.4 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.125+ #4 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1691 Comm: cron Not tainted 4.14.125+ #4 task: 00000000ea8e1b4c task.stack: 00000000fc9bd7a2 RIP: 0010:in_lock_functions+0x0/0x20 kernel/locking/spinlock.c:398 RSP: 0000:ffff8881d4327088 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881d43270a0 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8881d4bf9fd8 R11: 0000000000000001 R12: 0000000000000001 R13: ffffea00068979a0 R14: ffffea0006897980 R15: ffff8881d54ec628 FS: 00007f84c27797a0(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f185e3c1180 CR3: 00000001d60c2001 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: get_lock_parent_ip include/linux/ftrace.h:741 [inline] preempt_latency_start kernel/sched/core.c:3147 [inline] preempt_count_add+0xfa/0x180 kernel/sched/core.c:3172 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:109 [inline] _raw_spin_lock_irqsave+0x26/0x60 kernel/locking/spinlock.c:160 __remove_mapping+0x9e/0x560 mm/vmscan.c:690 shrink_page_list+0x1870/0x32b0 mm/vmscan.c:1321 shrink_inactive_list+0x39a/0x1170 mm/vmscan.c:1826 shrink_list mm/vmscan.c:2179 [inline] shrink_node_memcg+0x622/0x1350 mm/vmscan.c:2444 shrink_node+0x2fa/0xbf0 mm/vmscan.c:2636 shrink_zones mm/vmscan.c:2818 [inline] do_try_to_free_pages+0x350/0xd80 mm/vmscan.c:2876 try_to_free_pages+0x20a/0x6c0 mm/vmscan.c:3082 __perform_reclaim mm/page_alloc.c:3601 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3623 [inline] __alloc_pages_slowpath mm/page_alloc.c:4010 [inline] __alloc_pages_nodemask+0xac8/0x22e0 mm/page_alloc.c:4219 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] pagecache_get_page+0x246/0x790 mm/filemap.c:1494 filemap_fault+0xc90/0x1810 mm/filemap.c:2495 ext4_filemap_fault+0x84/0xb0 fs/ext4/inode.c:6179 __do_fault+0x100/0x380 mm/memory.c:3223 do_read_fault mm/memory.c:3633 [inline] do_fault mm/memory.c:3759 [inline] handle_pte_fault mm/memory.c:3989 [inline] __handle_mm_fault+0x9a0/0x2640 mm/memory.c:4113 handle_mm_fault+0x2e0/0x6c9 mm/memory.c:4150 __do_page_fault+0x466/0xb80 arch/x86/mm/fault.c:1423 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1120 RIP: 849a2aa0: (null) RSP: c2135380:0000000000000001 EFLAGS: 00000001 Code: e8 56 bb 32 00 e9 42 ff ff ff 48 c7 c7 60 c6 90 b1 e8 45 bb 32 00 eb 88 0f 1f 00 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <31> c0 48 81 ff 38 de 25 b0 72 0c 31 c0 48 81 ff eb e7 25 b0 0f [32637] 0 32637 18211 8970 27 4 0 1000 syz-executor.2