[ 9446] 0 9446 17750 8239 26 4 0 1000 syz-executor2 [ 9475] 0 9475 17618 8234 26 4 0 0 syz-executor5 [ 9555] 0 9555 17717 8237 26 4 0 1000 syz-executor2 [ 9605] 0 9605 17717 8237 26 4 0 1000 syz-executor2 INFO: task syz-executor0:26496 blocked for more than 140 seconds. Not tainted 4.14.90+ #29 [ 9671] 0 9671 17750 8239 26 4 0 1000 syz-executor2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D30248 26496 1847 0x00000004 Call Trace: [ 9718] 0 9718 17750 8239 26 4 0 1000 syz-executor2 [ 9744] 0 9744 17618 8234 26 4 0 0 syz-executor5 [ 9761] 0 9761 17717 8237 26 4 0 1000 syz-executor2 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [ 9823] 0 9823 17717 8237 26 4 0 1000 syz-executor2 [ 9933] 0 9933 17717 8237 26 4 0 1000 syz-executor2 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [10020] 0 10020 17717 8237 26 4 0 1000 syz-executor2 [10078] 0 10078 17717 8237 26 4 0 1000 syz-executor2 [10123] 0 10123 17717 8237 26 4 0 1000 syz-executor2 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [10148] 0 10148 17618 8233 26 4 0 1000 syz-executor3 [10199] 0 10199 17618 8233 26 4 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [10235] 0 10235 17717 8237 26 4 0 1000 syz-executor2 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457669 RSP: 002b:00007f117de1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [10256] 0 10256 17618 8233 26 4 0 1000 syz-executor3 [10277] 0 10277 17717 8237 26 4 0 1000 syz-executor2 [10320] 0 10320 17717 8237 26 4 0 1000 syz-executor2 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000072bfa0 R08: 0000000000000010 R09: 0000000000000000 [10333] 0 10333 17618 8233 26 4 0 1000 syz-executor3 R10: 0000000020000080 R11: 0000000000000246 R12: 00007f117de1b6d4 [10379] 0 10379 17618 8233 26 4 0 1000 syz-executor3 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff INFO: task syz-executor0:26499 blocked for more than 140 seconds. [11015] 0 11015 17585 8231 24 4 0 1000 syz-executor1 Not tainted 4.14.90+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11371] 0 11371 17618 8204 25 3 0 1000 syz-executor1 syz-executor0 D30248 26499 1847 0x00000004 Call Trace: [11409] 0 11409 17717 9255 26 3 0 1000 syz-executor1 [11582] 0 11582 17717 8225 26 4 0 1000 syz-executor1 [11616] 0 11616 17717 8225 26 4 0 1000 syz-executor1 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [12033] 0 12033 17651 8220 25 4 0 1000 syz-executor1 [12048] 0 12048 17651 8220 25 4 0 1000 syz-executor1 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [12280] 0 12280 17618 8216 25 4 0 1000 syz-executor3 [12282] 0 12282 17618 8216 25 4 0 1000 syz-executor3 [12548] 0 12548 17651 8239 26 4 0 1000 syz-executor3 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [12580] 0 12580 17585 8234 26 4 0 1000 syz-executor3 [12604] 0 12604 17585 8234 26 4 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [12612] 0 12612 17618 12673 32 3 0 1000 syz-executor4 [12634] 0 12634 17585 8234 26 4 0 1000 syz-executor3 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457669 RSP: 002b:00007f117ddd8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [12655] 0 12655 17618 12673 32 3 0 1000 syz-executor4 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000005 [12691] 0 12691 17585 8234 26 4 0 1000 syz-executor3 RBP: 000000000072c0e0 R08: 0000000000000010 R09: 0000000000000000 [12696] 0 12696 17618 12673 32 3 0 1000 syz-executor4 R10: 0000000020000080 R11: 0000000000000246 R12: 00007f117ddd96d4 [12720] 0 12720 17585 8234 26 4 0 1000 syz-executor3 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff Showing all locks held in the system: [12740] 0 12740 17618 12673 32 3 0 1000 syz-executor4 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by getty/1758: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor4/31138: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x4e/0x110 fs/exec.c:1389 ============================================= [12781] 0 12781 17618 12673 32 3 0 1000 syz-executor4 [12806] 0 12806 17585 8200 25 3 0 1000 syz-executor3 [12812] 0 12812 17618 8202 25 3 0 1000 syz-executor3 [12822] 0 12822 17618 12673 32 3 0 1000 syz-executor4 [12863] 0 12863 17618 12673 32 3 0 1000 syz-executor4 [12907] 0 12907 17618 12673 32 3 0 1000 syz-executor4 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.90+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26489 Comm: getty Not tainted 4.14.90+ #29 task: ffff8881d23d4680 task.stack: ffff88819eb68000 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x26/0x50 kernel/rcu/update.c:300 RSP: 0000:ffff88819eb6eed0 EFLAGS: 00000803 RAX: dffffc0000000000 RBX: ffff8881d23d4680 RCX: 1ffffffff3095884 RDX: 0000000000000000 RSI: ffffffff9814e400 RDI: ffff8881d23d4eac RBP: ffff8881c693d268 R08: 0000000000004caf R09: 0000000000000000 R10: ffff8881d23d4f00 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888198f30640 R15: 0000000000000001 FS: 00007fed853c8700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed851c7890 CR3: 0000000198e90006 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x41d/0x720 kernel/locking/lockdep.c:4009 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x1b/0x70 kernel/locking/spinlock.c:192 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] __remove_mapping+0x2c5/0x570 mm/vmscan.c:758 shrink_page_list+0x1540/0x31d0 mm/vmscan.c:1311 shrink_inactive_list+0x3b9/0xee0 mm/vmscan.c:1816 shrink_list mm/vmscan.c:2175 [inline] shrink_node_memcg+0x5e8/0x12e0 mm/vmscan.c:2438 shrink_node+0x301/0xbf0 mm/vmscan.c:2630 shrink_zones mm/vmscan.c:2812 [inline] do_try_to_free_pages+0x349/0xde0 mm/vmscan.c:2874 try_to_free_pages+0x204/0x6b0 mm/vmscan.c:3080 __perform_reclaim mm/page_alloc.c:3593 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3614 [inline] __alloc_pages_slowpath mm/page_alloc.c:4001 [inline] __alloc_pages_nodemask+0xa8a/0x2180 mm/page_alloc.c:4210 __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] page_cache_read mm/filemap.c:2286 [inline] filemap_fault+0xcdd/0x14a0 mm/filemap.c:2470 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6179 __do_fault+0x80/0x210 mm/memory.c:3194 do_read_fault mm/memory.c:3604 [inline] do_fault mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:3960 [inline] __handle_mm_fault+0x991/0x25f0 mm/memory.c:4084 handle_mm_fault+0x2f2/0x6eb mm/memory.c:4121 __do_page_fault+0x45d/0xb60 arch/x86/mm/fault.c:1425 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1104 RIP: 7c967e3f:0x2 RSP: 84c257e8:00007fed853cfee8 EFLAGS: 00000004 Code: ff ff 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 53 65 48 8b 1c 25 c0 de 01 00 48 8d bb 2c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 0f 8b 93 2c 08 [13050] 0 13050 17585 8199 25 3 0 1000 syz-executor4