[29962] 0 29962 17585 8439 24 3 0 0 syz-executor0 [29964] 0 29964 17618 8476 25 4 0 0 syz-executor0 [29966] 0 29966 17618 8442 24 3 0 0 syz-executor0 [29973] 0 29973 17618 8445 24 3 0 0 syz-executor4 [29976] 0 29976 17585 8439 24 3 0 0 syz-executor0 INFO: task kworker/u4:10:4988 blocked for more than 140 seconds. Not tainted 4.14.89+ #25 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [29980] 0 29980 17585 8441 24 3 0 0 syz-executor1 kworker/u4:10 D26264 4988 2 0x90000000 Workqueue: netns cleanup_net Call Trace: [29983] 0 29983 17618 8442 24 3 0 0 syz-executor0 [29984] 0 29984 17618 8477 25 4 0 0 syz-executor1 [29986] 0 29986 17585 8439 24 3 0 0 syz-executor2 [29991] 0 29991 17618 8442 24 3 0 0 syz-executor2 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 [29995] 0 29995 17585 8441 24 3 0 0 syz-executor1 [30001] 0 30001 17618 8479 25 4 0 0 syz-executor1 [30004] 0 30004 17618 8444 24 3 0 0 syz-executor1 [30009] 0 30009 17585 8439 24 3 0 0 syz-executor2 cleanup_net+0x14c/0x880 net/core/net_namespace.c:449 [30012] 0 30012 17585 8441 24 3 0 0 syz-executor1 process_one_work+0x86e/0x1670 kernel/workqueue.c:2114 [30016] 0 30016 17618 8442 24 3 0 0 syz-executor2 [30020] 0 30020 17618 8444 24 3 0 0 syz-executor1 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 [30031] 0 30031 17585 8439 24 3 0 0 syz-executor2 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 [30036] 0 30036 17618 8442 24 3 0 0 syz-executor2 Showing all locks held in the system: [30039] 0 30039 17585 8439 24 3 0 0 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 getty/1760: #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 3 locks held by kworker/u4:10/4988: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 [30040] 0 30040 17618 8476 25 4 0 0 syz-executor0 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x14c/0x880 net/core/net_namespace.c:449 1 lock held by syz-executor3/3927: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/4307: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/4459: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor4/4545: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5035: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5112: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5116: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5282: [30041] 0 30041 17618 8442 24 3 0 0 syz-executor0 #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5321: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5351: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor2/5383: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor4/5450: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/5588: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5760: [30049] 0 30049 17585 8439 24 3 0 0 syz-executor0 #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/5858: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor2/5904: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/6215: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30052] 0 30052 17585 8477 25 4 0 0 syz-executor0 1 lock held by syz-executor3/6227: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/6238: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/6262: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/6268: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/6510: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/6535: [30058] 0 30058 17585 8439 24 3 0 0 syz-executor0 #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/6819: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/6832: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/6870: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/6906: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/6943: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/7258: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/7310: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30059] 0 30059 17618 8466 25 4 0 0 syz-executor0 1 lock held by syz-executor3/7546: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/7613: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/7748: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/7945: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/7987: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8031: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor5/8054: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8077: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30060] 0 30060 17618 8442 24 3 0 0 syz-executor0 1 lock held by syz-executor3/8172: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8182: [30068] 0 30068 17585 8439 24 3 0 0 syz-executor0 #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8356: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/8406: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8413: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor5/8475: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8479: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/8497: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30072] 0 30072 17585 8441 24 3 0 0 syz-executor1 1 lock held by syz-executor3/8892: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9190: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9226: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9253: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9282: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9324: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9474: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9586: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30073] 0 30073 17618 8476 25 4 0 0 syz-executor1 1 lock held by syz-executor3/9605: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9764: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/9818: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor4/9838: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/9967: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor3/10037: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/10327: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/10355: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor0/10685: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 [30074] 0 30074 17618 8444 24 3 0 0 syz-executor1 1 lock held by syz-executor1/10706: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/11311: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/12286: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor2/13115: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/13658: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/15206: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/15342: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 1 lock held by syz-executor1/15790: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 ============================================= [30080] 0 30080 17585 8441 24 3 0 0 syz-executor1 [30081] 0 30081 17618 8442 24 3 0 0 syz-executor0 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.89+ #25 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 [30085] 0 30085 17618 8444 24 3 0 0 syz-executor1 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: 1630 Comm: rs:main Q:Reg Not tainted 4.14.89+ #25 task: ffff8881d4c59780 task.stack: ffff8881d4718000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:60 RSP: 0000:ffff8881d471ef98 EFLAGS: 00000246 RAX: 0000000000000009 RBX: ffffea00019a9bc0 RCX: 1ffffffff5195884 RDX: 1ffffd4000335378 RSI: ffffffffa894e400 RDI: ffffea00019a9bc0 RBP: ffffea00019a9be0 R08: 0000000000000000 R09: 0000000000000000 R10: ffff8881d4c5a000 R11: 0000000000000001 R12: ffffea00019a9bc0 R13: dead000000000100 R14: ffff8881d471f920 R15: ffffea00019a9bc0 FS: 00007f40b6a24700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe27fab4330 CR3: 00000001d58e2006 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __read_once_size include/linux/compiler.h:183 [inline] compound_head include/linux/page-flags.h:147 [inline] PageSwapBacked include/linux/page-flags.h:288 [inline] PageSwapCache include/linux/page-flags.h:333 [inline] page_mapping+0x9e/0x290 mm/util.c:481 page_evictable+0x62/0x200 mm/vmscan.c:3968 shrink_page_list+0x357/0x31d0 mm/vmscan.c:1000 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: 0000:0x2 RSP: 196fa38:0000000000000000 EFLAGS: 00000017 Code: ff ff 48 89 df e8 81 02 22 00 e9 9f fe ff ff 4c 89 e7 e8 74 02 22 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 48 8b 04 25 c0 de 01 00 48 85 c0 74 1a 65 8b 15 db f5 30 59