BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 8281, name: kworker/u4:5 5 locks held by kworker/u4:5/8281: #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000097a88069 (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000007b4e8ee0 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:520 #3: 0000000009bffeda (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 #4: 000000009f8908c0 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:168 [inline] #4: 000000009f8908c0 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xda/0x720 kernel/time/timer.c:1316 Preemption disabled at: [] __do_softirq+0xf3/0x921 kernel/softirq.c:269 CPU: 0 PID: 8281 Comm: kworker/u4:5 Not tainted 4.19.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 ___might_sleep.cold+0x1bd/0x1f6 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xc8/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x2a/0x60 kernel/rcu/update.c:254 Code: 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 40 ee 01 00 48 8d bb 7c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 10 8b 93 7c 08 00 RSP: 0018:ffff8880588af678 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880588a0600 RCX: 1ffffffff1279058 RDX: 0000000000000000 RSI: ffffffff88f95be0 RDI: ffff8880588a0e7c RBP: ffff8880588af680 R08: ffff8880588a0600 R09: ffff8880588a0f18 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff884eaf40 R13: 0000000000000789 R14: 0000000000000001 R15: dffffc0000000000 debug_lockdep_rcu_enabled+0x71/0xa0 kernel/rcu/update.c:253 ___might_sleep+0x30/0x2b0 kernel/sched/core.c:6157 get_next_corpse net/netfilter/nf_conntrack_core.c:1929 [inline] nf_ct_iterate_cleanup+0x22a/0x4e0 net/netfilter/nf_conntrack_core.c:1951 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2036 [inline] nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2021 masq_device_event+0xb5/0xe0 net/ipv6/netfilter/nf_nat_masquerade_ipv6.c:77 notifier_call_chain+0xc2/0x230 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1748 call_netdevice_notifiers net/core/dev.c:1766 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1518 rollback_registered_many+0x33f/0xda0 net/core/dev.c:8177 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9312 unregister_netdevice_many net/core/dev.c:9311 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9783 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ================================ WARNING: inconsistent lock state 4.19.96-syzkaller #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/u4:5/8281 [HC0[0]:SC1[1]:HE1:SE0] takes: 0000000074514d27 (&tpk_port.port_write_mutex){+.?.}, at: tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 process_output_block drivers/tty/n_tty.c:593 [inline] n_tty_write+0x3f9/0x1140 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:960 [inline] tty_write+0x458/0x7a0 drivers/tty/tty_io.c:1044 __vfs_write+0x114/0x810 fs/read_write.c:485 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 188700204 hardirqs last enabled at (188700204): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (188700203): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (188700052): [] get_next_corpse net/netfilter/nf_conntrack_core.c:1918 [inline] softirqs last enabled at (188700052): [] nf_ct_iterate_cleanup+0x1f1/0x4e0 net/netfilter/nf_conntrack_core.c:1951 softirqs last disabled at (188700055): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (188700055): [] irq_exit+0x180/0x1d0 kernel/softirq.c:412 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&tpk_port.port_write_mutex); lock(&tpk_port.port_write_mutex); *** DEADLOCK *** 5 locks held by kworker/u4:5/8281: #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000005d5c0abe ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000097a88069 (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000007b4e8ee0 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:520 #3: 0000000009bffeda (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 #4: 000000009f8908c0 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:168 [inline] #4: 000000009f8908c0 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xda/0x720 kernel/time/timer.c:1316 stack backtrace: CPU: 0 PID: 8281 Comm: kworker/u4:5 Tainted: G W 4.19.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x330/0x42a kernel/locking/lockdep.c:2540 valid_state kernel/locking/lockdep.c:2553 [inline] mark_lock_irq kernel/locking/lockdep.c:2747 [inline] mark_lock+0xd1b/0x1370 kernel/locking/lockdep.c:3127 mark_irqflags kernel/locking/lockdep.c:3005 [inline] __lock_acquire+0xc62/0x49c0 kernel/locking/lockdep.c:3368 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x2a/0x60 kernel/rcu/update.c:254 Code: 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 40 ee 01 00 48 8d bb 7c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 10 8b 93 7c 08 00 RSP: 0018:ffff8880588af678 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880588a0600 RCX: 1ffffffff1279058 RDX: 0000000000000000 RSI: ffffffff88f95be0 RDI: ffff8880588a0e7c RBP: ffff8880588af680 R08: ffff8880588a0600 R09: ffff8880588a0f18 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff884eaf40 R13: 0000000000000789 R14: 0000000000000001 R15: dffffc0000000000 debug_lockdep_rcu_enabled+0x71/0xa0 kernel/rcu/update.c:253 ___might_sleep+0x30/0x2b0 kernel/sched/core.c:6157 get_next_corpse net/netfilter/nf_conntrack_core.c:1929 [inline] nf_ct_iterate_cleanup+0x22a/0x4e0 net/netfilter/nf_conntrack_core.c:1951 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2036 [inline] nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2021 masq_device_event+0xb5/0xe0 net/ipv6/netfilter/nf_nat_masquerade_ipv6.c:77 notifier_call_chain+0xc2/0x230 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1748 call_netdevice_notifiers net/core/dev.c:1766 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1518 rollback_registered_many+0x33f/0xda0 net/core/dev.c:8177 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9312 unregister_netdevice_many net/core/dev.c:9311 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9783 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 8281, name: kworker/u4:5 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0xf3/0x921 kernel/softirq.c:269 CPU: 0 PID: 8281 Comm: kworker/u4:5 Tainted: G W 4.19.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 ___might_sleep.cold+0x1bd/0x1f6 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xc8/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x22e/0x320 drivers/net/hamradio/6pack.c:523 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x2a/0x60 kernel/rcu/update.c:254 Code: 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 40 ee 01 00 48 8d bb 7c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 10 8b 93 7c 08 00 RSP: 0018:ffff8880588af678 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880588a0600 RCX: 1ffffffff1279058 RDX: 0000000000000000 RSI: ffffffff88f95be0 RDI: ffff8880588a0e7c RBP: ffff8880588af680 R08: ffff8880588a0600 R09: ffff8880588a0f18 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff884eaf40 R13: 0000000000000789 R14: 0000000000000001 R15: dffffc0000000000 debug_lockdep_rcu_enabled+0x71/0xa0 kernel/rcu/update.c:253 ___might_sleep+0x30/0x2b0 kernel/sched/core.c:6157 get_next_corpse net/netfilter/nf_conntrack_core.c:1929 [inline] nf_ct_iterate_cleanup+0x22a/0x4e0 net/netfilter/nf_conntrack_core.c:1951 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2036 [inline] nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2021 masq_device_event+0xb5/0xe0 net/ipv6/netfilter/nf_nat_masquerade_ipv6.c:77 notifier_call_chain+0xc2/0x230 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1748 call_netdevice_notifiers net/core/dev.c:1766 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1518 rollback_registered_many+0x33f/0xda0 net/core/dev.c:8177 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9312 unregister_netdevice_many net/core/dev.c:9311 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9783 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 device hsr_slave_1 left promiscuous mode device hsr_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 13824, name: syz-executor.4 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0xf3/0x921 kernel/softirq.c:269 CPU: 0 PID: 13824 Comm: syz-executor.4 Tainted: G W 4.19.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 ___might_sleep.cold+0x1bd/0x1f6 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xc8/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0033:0x40fda4 Code: f0 0f 1f 44 00 00 48 8d 6f f8 4c 39 c1 49 89 ee 77 2c 48 83 e8 08 48 39 ca 76 0f 0f 1f 00 48 83 e8 08 48 8b 10 48 39 ca 77 f4 <48> 39 e8 76 18 48 89 57 f8 4c 89 00 48 8b 50 f8 49 8b 0c 24 4c 8b RSP: 002b:00007ffc0420f2e0 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: 00007fc13373b090 RBX: 00007fc133711cb0 RCX: ffffffff81910fb8 RDX: ffffffff81910c1f RSI: 00007fc133794b18 RDI: 00007fc13373a058 RBP: 00007fc13373a050 R08: ffffffff81913b9e R09: 0000000029a79193 R10: 00007ffc0420f510 R11: 0000000000000246 R12: 00007fc133711ca0 R13: 000000000000001d R14: 00007fc13373a050 R15: 0000000000021fb9 ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13854] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#e   @ ="[13854] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13860] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13873] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13895] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13902] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13908] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13910] ptrace attach of "/root/syz-executor.0"[11296] was attempted by " 0 p   N#   @ ="[13916] ptrace attach of "/root/syz-executor.4"[3734] was attempted by " 0 p   N#   @ ="[13919]