INFO: task syz-executor.2:32316 can't die for more than 143 seconds. task:syz-executor.2 state:R running task stack:26472 pid:32316 ppid: 6870 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4785 irqentry_exit_cond_resched kernel/entry/common.c:332 [inline] irqentry_exit_cond_resched kernel/entry/common.c:324 [inline] irqentry_exit+0x65/0x90 kernel/entry/common.c:362 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:653 [inline] RIP: 0010:lock_acquire+0x27b/0xad0 kernel/locking/lockdep.c:5008 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d 9a d7 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7 RSP: 0018:ffffc90008b7f7c8 EFLAGS: 00000286 RAX: 1ffffffff136c7d9 RBX: ffff88804e8362c0 RCX: 000000005603e267 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c68d9e7 R10: fffffbfff18d1b3c R11: 0000000000000001 R12: 0000000000000002 R13: ffffffff89c675c0 R14: 0000000000000000 R15: ffff88804e8362c0 rcu_lock_acquire include/linux/rcupdate.h:248 [inline] rcu_read_lock include/linux/rcupdate.h:641 [inline] inet_twsk_purge+0x112/0x7c0 net/ipv4/inet_timewait_sock.c:268 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189 setup_net+0x508/0x850 net/core/net_namespace.c:364 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:482 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x385/0x470 kernel/nsproxy.c:179 copy_process+0x294b/0x6920 kernel/fork.c:2071 _do_fork+0xe8/0xb10 kernel/fork.c:2427 __do_sys_clone+0xc8/0x110 kernel/fork.c:2544 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d4d9 Code: Bad RIP value. RSP: 002b:00007f091a1c5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000001f40 RCX: 000000000045d4d9 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 00000000e1004d7c RBP: 000000000118cf90 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007fff5ff557af R14: 00007f091a1c69c0 R15: 000000000118cf4c Showing all locks held in the system: 3 locks held by kworker/0:1/12: #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90000d2fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:250 1 lock held by khungtaskd/1149: #0: ffffffff89c675c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 1 lock held by in:imklog/6582: #0: ffff8880a2461e30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 2 locks held by agetty/6748: #0: ffff88809f6b8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc90000fc42e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/32316: 2 locks held by syz-executor.5/4219: #0: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:687 [inline] #0: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3390 #1: ffffffff89c6bc28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff89c6bc28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4e8/0x5f0 kernel/rcu/tree_exp.h:836 1 lock held by syz-executor.0/4223: #0: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x705/0xac0 net/core/dev.c:10106 1 lock held by syz-executor.2/4244: #0: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1060 2 locks held by syz-executor.3/4252: #0: ffffffff8a8d7d50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:741 #1: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: ethnl_set_linkmodes+0x2a6/0xdd0 net/ethtool/linkmodes.c:417 2 locks held by syz-executor.3/4254: #0: ffffffff8a8d7d50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:741 #1: ffffffff8a879e88 (rtnl_mutex){+.+.}-{3:3}, at: ethnl_set_linkmodes+0x2a6/0xdd0 net/ethtool/linkmodes.c:417 =============================================