[26859] 0 26859 17634 12722 31 3 0 1000 syz-executor2 [26877] 0 26877 17700 8241 25 3 0 0 syz-executor0 [26908] 0 26908 17601 8230 23 3 0 0 syz-executor0 [26914] 0 26914 17634 12722 31 3 0 1000 syz-executor2 [26938] 0 26938 17667 8239 24 3 0 0 syz-executor0 INFO: task syz-executor1:31426 blocked for more than 140 seconds. [26985] 0 26985 17634 12722 31 3 0 1000 syz-executor2 [27001] 0 27001 17700 8462 25 4 0 0 syz-executor5 Not tainted 4.14.91+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [27018] 0 27018 17634 12722 31 3 0 1000 syz-executor2 syz-executor1 D29744 31426 1835 0x00000004 [27072] 0 27072 17601 8231 25 3 0 1000 syz-executor3 Call Trace: [27083] 0 27083 17634 12722 31 3 0 1000 syz-executor2 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [27084] 0 27084 17634 8458 25 4 0 0 syz-executor5 [27103] 0 27103 17733 9300 25 3 0 1000 syz-executor3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 [27151] 0 27151 17634 12722 31 3 0 1000 syz-executor2 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3671 [27199] 0 27199 17634 8234 24 3 0 0 syz-executor0 [27211] 0 27211 17634 12722 31 3 0 1000 syz-executor2 [27220] 0 27220 17700 8238 24 3 0 0 syz-executor0 [27306] 0 27306 17634 12722 31 3 0 1000 syz-executor2 [27365] 0 27365 17667 8461 24 3 0 0 syz-executor1 [27370] 0 27370 17634 12722 31 3 0 1000 syz-executor2 Showing all locks held in the system: [27500] 0 27500 17634 12722 31 3 0 1000 syz-executor2 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1743: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:5/2109: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 1 lock held by init/31434: #0: (&type->i_mutex_dir_key#3){++++}, at: [] inode_lock_shared include/linux/fs.h:725 [inline] #0: (&type->i_mutex_dir_key#3){++++}, at: [] lookup_slow+0x140/0x440 fs/namei.c:1688 1 lock held by init/31435: #0: (&type->i_mutex_dir_key#3){++++}, at: [] inode_lock_shared include/linux/fs.h:725 [inline] #0: (&type->i_mutex_dir_key#3){++++}, at: [] lookup_slow+0x140/0x440 fs/namei.c:1688 1 lock held by init/31438: #0: (&type->i_mutex_dir_key#3){++++}, at: [] inode_lock_shared include/linux/fs.h:725 [inline] #0: (&type->i_mutex_dir_key#3){++++}, at: [] lookup_slow+0x140/0x440 fs/namei.c:1688 ============================================= [27509] 0 27509 17634 12722 31 3 0 1000 syz-executor2 [27551] 0 27551 17667 8485 26 4 0 0 syz-executor1 [27557] 0 27557 17634 12722 31 3 0 1000 syz-executor2 [27607] 0 27607 17601 8223 23 3 0 0 syz-executor0 [27631] 0 27631 17634 12722 31 3 0 1000 syz-executor2 [27638] 0 27638 17667 8237 24 3 0 0 syz-executor0 [27715] 0 27715 17634 12722 31 3 0 1000 syz-executor2 [27760] 0 27760 17634 12722 31 3 0 1000 syz-executor2 [27769] 0 27769 17667 8457 25 4 0 0 syz-executor4 [27773] 0 27773 17667 8457 25 4 0 0 syz-executor4 [27825] 0 27825 17634 8481 26 4 0 0 syz-executor1 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #3 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: 30453 Comm: udevd Not tainted 4.14.91+ #3 task: ffff88819c28de00 task.stack: ffff8880b3280000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_release+0x3cd/0x730 kernel/locking/lockdep.c:4013 RSP: 0000:ffff8880b3287400 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 1ffff11016650e83 RCX: 1ffff11033851cc4 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000246 RBP: ffff88819c28de00 R08: 0000000000000001 R09: 0000000000000003 R10: ffff88819c28e6a8 R11: 0000000000000001 R12: 6b799ebb7a96bf09 R13: ffff88819c28de00 R14: 0000000000000004 R15: ffff88819c28e628 FS: 00007f205db9d7a0(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcf4d6d7dd3 CR3: 0000000086aca004 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] __list_lru_count_one mm/list_lru.c:174 [inline] list_lru_count_one+0x12a/0x1d0 mm/list_lru.c:182 list_lru_shrink_count include/linux/list_lru.h:117 [inline] super_cache_count+0x133/0x2b0 fs/super.c:143 do_shrink_slab mm/vmscan.c:328 [inline] shrink_slab.part.0+0x251/0xa40 mm/vmscan.c:504 shrink_slab mm/vmscan.c:468 [inline] shrink_node+0x8b5/0xbf0 mm/vmscan.c:2667 shrink_zones mm/vmscan.c:2814 [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:3593 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3614 [inline] __alloc_pages_slowpath mm/page_alloc.c:4001 [inline] __alloc_pages_nodemask+0xac8/0x22e0 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+0x900/0x14a0 mm/filemap.c:2470 ext4_filemap_fault+0x84/0xb0 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+0x9a0/0x2640 mm/memory.c:4084 handle_mm_fault+0x2e0/0x6c9 mm/memory.c:4121 __do_page_fault+0x466/0xb80 arch/x86/mm/fault.c:1425 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1104 RIP: 0002:0xffffffffffffff00 RSP: 1aaa980:0000000000000014 EFLAGS: 00000001 Code: ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 41 02 00 00 c7 85 2c 08 00 00 00 00 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 [27840] 0 27840 17634 12722 31 3 0 1000 syz-executor2