INFO: task kworker/u4:13:2954 blocked for more than 140 seconds. Not tainted 4.14.133+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:13 D28776 2954 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x92/0x1c0 /kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3556 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 /kernel/locking/mutex.c:893 cleanup_net+0x136/0x870 /net/core/net_namespace.c:450 process_one_work+0x7f1/0x1580 /kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 /kernel/workqueue.c:2271 kthread+0x31f/0x430 /kernel/kthread.c:232 ret_from_fork+0x3a/0x50 /arch/x86/entry/entry_64.S:404 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [<000000006625bffd>] debug_show_all_locks+0x7c/0x21a /kernel/locking/lockdep.c:4541 2 locks held by getty/1759: #0: (&tty->ldisc_sem){++++}, at: [<000000006764a2ed>] tty_ldisc_ref_wait+0x22/0x80 /drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f31918e9>] n_tty_read+0x1f7/0x1700 /drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/2863: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/2865: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.2/2916: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 3 locks held by kworker/u4:13/2954: #0: ("%s""netns"){+.+.}, at: [<00000000c1bce10b>] process_one_work+0x6ff/0x1580 /kernel/workqueue.c:2105 #1: (net_cleanup_work){+.+.}, at: [<00000000bafb43ef>] process_one_work+0x735/0x1580 /kernel/workqueue.c:2109 #2: (net_mutex){+.+.}, at: [<00000000fe26d4bb>] cleanup_net+0x136/0x870 /net/core/net_namespace.c:450 1 lock held by syz-executor.0/2985: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.2/2997: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3031: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.2/3038: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/3053: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3090: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/3100: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3136: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3164: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3222: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3270: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/3287: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/3353: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3389: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3410: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3464: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3597: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/3665: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3690: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/3717: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/3737: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/3884: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/3899: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.4/4018: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4030: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/4045: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4087: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4110: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.4/4158: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4180: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.4/4219: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4317: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4323: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4379: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4421: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4493: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4533: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4545: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/4574: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4576: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4617: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/4622: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.2/4633: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4662: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4665: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4732: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4746: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4758: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4801: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4814: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/4818: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.2/4821: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4834: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4856: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.3/4857: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/4901: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/4980: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/5053: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/5063: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/5105: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/5141: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/5154: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/5183: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.0/5218: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/5327: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/5340: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/5452: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/5620: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/5696: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/6250: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.5/6265: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/6706: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.1/7115: #0: (net_mutex){+.+.}, at: [<00000000a4ce2453>] copy_net_ns+0x150/0x480 /net/core/net_namespace.c:410 1 lock held by syz-executor.4/8971: #0: (&sig->cred_guard_mutex){+.+.}, at: [<000000003b075abb>] prepare_bprm_creds+0x51/0x110 /fs/exec.c:1389 ============================================= kauditd_printk_skb: 124 callbacks suppressed audit: type=1400 audit(2000000929.530:44381): avc: denied { map } for pid=8986 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(2000000929.540:44382): avc: denied { map } for pid=8986 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 netlink: 3 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1400 audit(2000000929.570:44383): avc: denied { map } for pid=8986 comm="blkid" path="/lib/x86_64-linux-gnu/ld-2.13.so" dev="sda1" ino=2668 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.133+ #17 Call Trace: __dump_stack /lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 /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: 2858 Comm: syz-executor.2 Not tainted 4.14.133+ #17 task: 0000000078ba16b5 task.stack: 0000000081370148 RIP: 0010:on_stack /./arch/x86/include/asm/stacktrace.h:44 [inline] RIP: 0010:stack_access_ok+0x0/0x130 /arch/x86/kernel/unwind_orc.c:279 RSP: 0018:ffff888162eff510 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff1102c5dfea3 RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffff888162eff980 RDI: ffff888162eff670 RBP: ffff888162eff980 R08: 0000000000000001 R09: ffff888162eff978 R10: ffff888162eff6a5 R11: 000000000001c033 R12: ffff888162eff6b0 R13: dffffc0000000000 R14: ffff888162eff9a8 R15: 0000000000000001 FS: 00007f29b0610700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffff3253ec0 CR3: 0000000164870001 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: deref_stack_reg+0x66/0xe0 /arch/x86/kernel/unwind_orc.c:289 unwind_next_frame+0xe07/0x1810 /arch/x86/kernel/unwind_orc.c:474 Code: 00 48 89 df e8 52 e6 48 00 eb 9d be 06 00 00 00 4c 89 e7 e8 33 e6 48 00 e9 1c ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 f9 41 54 49 89 fc 55 48 c1