[13228] 0 13228 17700 8447 26 4 0 1000 syz-executor0 [13320] 0 13320 17700 8446 32 4 0 0 syz-executor5 [13499] 0 13499 17667 8445 26 3 0 1000 syz-executor0 [13600] 0 13600 17601 8439 25 4 0 0 syz-executor3 [13613] 0 13613 17634 8441 25 4 0 1000 syz-executor1 INFO: task syz-executor2:6771 blocked for more than 140 seconds. Not tainted 4.14.90+ #29 [13728] 0 13728 17799 8453 25 4 0 0 syz-executor5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D28408 6771 1860 0x10000004 [13860] 0 13860 17601 8235 25 3 0 0 syz-executor3 [13862] 0 13862 17633 8237 25 3 0 0 syz-executor3 Call Trace: [13942] 0 13942 17634 8233 24 3 0 0 syz-executor3 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 [14169] 0 14169 17601 8231 24 3 0 1000 syz-executor1 [14186] 0 14186 17667 8235 24 3 0 1000 syz-executor1 [14291] 0 14291 17799 8453 25 4 0 0 syz-executor2 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [14343] 0 14343 17667 8444 25 4 0 1000 syz-executor0 [14525] 0 14525 17700 8447 25 4 0 0 syz-executor5 [14546] 0 14546 17601 8222 23 3 0 1000 syz-executor1 [14563] 0 14563 17634 8235 24 3 0 1000 syz-executor1 [14652] 0 14652 17733 8448 25 4 0 0 syz-executor2 [14691] 0 14691 17601 8231 24 3 0 0 syz-executor3 [14824] 0 14824 17667 8236 24 3 0 0 syz-executor2 [14850] 0 14850 17799 8245 24 3 0 0 syz-executor2 [15073] 0 15073 17601 8439 25 4 0 1000 syz-executor0 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x7be/0x2680 net/packet/af_packet.c:3742 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [15102] 0 15102 17634 8441 25 4 0 0 syz-executor3 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579b9 [15273] 0 15273 17634 12537 32 4 0 0 syz-executor5 [15299] 0 15299 17634 8441 25 4 0 1000 syz-executor0 RSP: 002b:00007f3d24f4ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [15373] 0 15373 17634 12932 31 3 0 0 syz-executor5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004579b9 [15427] 0 15427 17634 8236 26 3 0 0 syz-executor4 RDX: 000000000000000c RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000004 R09: 0000000000000000 [15430] 0 15430 17667 8238 26 3 0 0 syz-executor4 R10: 0000000020000180 R11: 0000000000000246 R12: 00007f3d24f4f6d4 R13: 00000000004c5805 R14: 00000000004da080 R15: 00000000ffffffff [15448] 0 15448 17634 12932 31 3 0 0 syz-executor5 Showing all locks held in the system: [15475] 0 15475 17634 8443 24 3 0 1000 syz-executor0 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 rsyslogd/1632: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/1759: #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 2 locks held by kworker/u4:64/17636: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 ============================================= [15491] 0 15491 17700 8448 25 3 0 1000 syz-executor0 [15511] 0 15511 17634 12932 31 3 0 0 syz-executor5 [15571] 0 15571 17601 8439 24 3 0 1000 syz-executor0 [15588] 0 15588 17700 8445 29 3 0 1000 syz-executor0 [15608] 0 15608 17667 8444 25 4 0 0 syz-executor3 [15612] 0 15612 17634 12932 31 3 0 0 syz-executor5 [15672] 0 15672 17667 8445 26 4 0 0 syz-executor2 [15690] 0 15690 17634 12932 31 3 0 0 syz-executor5 [15743] 0 15743 17634 12932 31 3 0 0 syz-executor5 [15821] 0 15821 17634 12932 31 3 0 0 syz-executor5 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: 6715 Comm: init Not tainted 4.14.90+ #29 task: ffff8880ad8a1780 task.stack: ffff88806eea0000 RIP: 0010:lock_acquire+0x45/0x380 kernel/locking/lockdep.c:3983 RSP: 0000:ffff88806eea7430 EFLAGS: 00000a07 RAX: dffffc0000000000 RBX: ffff8880ad8a1780 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880ad8a1fac RBP: ffff88819ccc1d98 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f33db4da7a0(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33dabaa3c7 CR3: 0000000025f58005 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] __list_lru_count_one mm/list_lru.c:171 [inline] list_lru_count_one+0x7f/0x1d0 mm/list_lru.c:182 list_lru_shrink_count include/linux/list_lru.h:117 [inline] super_cache_count+0x18a/0x2a0 fs/super.c:144 do_shrink_slab mm/vmscan.c:328 [inline] shrink_slab.part.8+0x25c/0xa30 mm/vmscan.c:504 shrink_slab mm/vmscan.c:468 [inline] shrink_node+0x8c8/0xbf0 mm/vmscan.c:2665 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: b886bce:0x3 RSP: daae3a78:00007f33db4ddac0 EFLAGS: 00000006 Code: 89 d5 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 c0 de 01 00 48 8d bb 2c 08 00 00 48 83 ec 18 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 80 02 00 00 [15909] 0 15909 17634 12932 31 3 0 0 syz-executor5