ip6t_REJECT: TCP_RESET illegal for non-tcp x_tables: ip6_tables: icmp6 match: only valid for protocol 58 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem INFO: task kworker/0:5:5190 blocked for more than 140 seconds. Not tainted 4.19.109-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:5 D29576 5190 2 0x80000000 Workqueue: events linkwatch_event Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 linkwatch_event+0xb/0x60 net/core/link_watch.c:236 process_one_work+0x91f/0x1640 kernel/workqueue.c:2153 worker_thread+0x96/0xe20 kernel/workqueue.c:2296 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 1 lock held by khungtaskd/1078: #0: 000000005641f7e3 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4436 3 locks held by rs:main Q:Reg/7986: #0: 00000000ac2f3a8b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767 #1: 000000008a0bb20e (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2775 [inline] #1: 000000008a0bb20e (sb_writers#4){.+.+}, at: vfs_write+0x418/0x550 fs/read_write.c:548 #2: 000000006c76250f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1817 [inline] #2: 000000006c76250f (&rq->lock){-.-.}, at: __schedule+0x1f8/0x1d80 kernel/sched/core.c:3453 1 lock held by rsyslogd/7989: #0: 0000000030c57a99 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767 2 locks held by getty/8110: #0: 0000000013a97629 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000c475a915 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8111: #0: 00000000a5f697cf (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000005db6af8c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8112: #0: 00000000e5d031a9 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000008c073add (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8113: #0: 000000005640c047 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000bd0fee43 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8114: #0: 00000000dd7928a3 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000fafb20f1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8115: #0: 000000004a02282e (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000a800eed2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8116: #0: 000000005cb14669 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000008ccfa610 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 3 locks held by kworker/0:5/5190: #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000ad0f1358 ((wq_completion)"events"){+.+.}, at: process_one_work+0x81a/0x1640 kernel/workqueue.c:2124 #1: 00000000386056a7 ((linkwatch_work).work){+.+.}, at: process_one_work+0x84e/0x1640 kernel/workqueue.c:2128 #2: 000000009695f2e3 (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 3 locks held by kworker/u4:0/10443: 3 locks held by kworker/1:0/9198: #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000cad5a4b6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x81a/0x1640 kernel/workqueue.c:2124 #1: 0000000017150454 ((addr_chk_work).work){+.+.}, at: process_one_work+0x84e/0x1640 kernel/workqueue.c:2128 #2: 000000009695f2e3 (rtnl_mutex){+.+.}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4466 3 locks held by syz-executor.4/4026: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1078 Comm: khungtaskd Not tainted 4.19.109-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x962/0xe40 kernel/hung_task.c:287 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4026 Comm: syz-executor.4 Not tainted 4.19.109-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_release kernel/locking/lockdep.c:3709 [inline] RIP: 0010:lock_release+0x533/0x820 kernel/locking/lockdep.c:3922 Code: 42 b2 7e 0f 85 47 fc ff ff e8 9d b6 b0 ff e9 3d fc ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e a1 02 00 00 45 8d 4f ff 45 39 8e 78 08 00 RSP: 0018:ffff8880ae607a08 EFLAGS: 00000802 RAX: 0000000000000000 RBX: 1ffff11015cc0f45 RCX: 1ffff1100761e5be RDX: 1ffff1100761e5bf RSI: 0000000000000002 RDI: ffff88803b0f2580 RBP: ee5b451e63248c55 R08: 0000000000000000 R09: 0000000000000001 R10: ffff88803b0f2e28 R11: ffffffff8b1c1f08 R12: ffffffff815c04ba R13: 0000000000000003 R14: ffff88803b0f2580 R15: 0000000000000002 FS: 00007f034ea71700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c42b019700 CR3: 000000008c28e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:82 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get+0xe6/0x2e0 kernel/time/timekeeping.c:756 clockevents_program_event+0x14a/0x350 kernel/time/clockevents.c:336 tick_program_event+0xb9/0x150 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x368/0x770 kernel/time/hrtimer.c:1534 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 88 56 b2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 0e 4c 93 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 d0 8f 27 fa 65 8b 05 39 e3 e2 78 RSP: 0018:ffff8880ae607d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1164ad1 RBX: 0000000000000286 RCX: 1ffff1100761e5c4 RDX: dffffc0000000000 RSI: ffff88803b0f2e00 RDI: 0000000000000286 RBP: ffffffff8b899c88 R08: ffff88803b0f2580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888055243310 R13: dffffc0000000000 R14: 1ffff11015cc0fa8 R15: ffff888098262718 debug_object_deactivate lib/debugobjects.c:568 [inline] debug_object_deactivate+0x1e4/0x360 lib/debugobjects.c:529 debug_rcu_head_unqueue kernel/rcu/rcu.h:205 [inline] rcu_do_batch kernel/rcu/tree.c:2583 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xbed/0x17f0 kernel/rcu/tree.c:2881 __do_softirq+0x26c/0x93c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17b/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline] RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d f8 1b 74 07 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 1c b3 c3 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d f2 7d 48 08 RSP: 0018:ffff8880471a7510 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1164ad3 RBX: 0000000000000200 RCX: 1ffff1100761e5c4 RDX: dffffc0000000000 RSI: ffff88803b0f2e00 RDI: ffff88803b0f2dfc RBP: ffffffff85ca9111 R08: ffff88803b0f2580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88803b0f2580 R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000 local_bh_enable include/linux/bottom_half.h:32 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:1928 [inline] nf_ct_iterate_cleanup+0x217/0x4b0 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+0x113/0x170 net/netfilter/nf_conntrack_core.c:2021 masq_device_event+0xd6/0x110 net/ipv4/netfilter/nf_nat_masquerade_ipv4.c:100 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1766 [inline] dev_close_many+0x30d/0x650 net/core/dev.c:1518 rollback_registered_many+0x2d6/0xc40 net/core/dev.c:8157 rollback_registered+0xf2/0x1c0 net/core/dev.c:8222 unregister_netdevice_queue net/core/dev.c:9275 [inline] unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9268 unregister_netdevice include/linux/netdevice.h:2614 [inline] __tun_detach+0xd86/0x1020 drivers/net/tun.c:737 tun_detach drivers/net/tun.c:754 [inline] tun_chr_close+0xd9/0x180 drivers/net/tun.c:3261 __fput+0x2cd/0x890 fs/file_table.c:278 task_work_run+0x13f/0x1b0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbcd/0x2f30 kernel/exit.c:880 do_group_exit+0x125/0x350 kernel/exit.c:983 get_signal+0x3ec/0x1f90 kernel/signal.c:2583 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x22b/0x2b0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x27b/0x2e0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x45f50a Code: 48 39 cf 75 21 48 89 44 24 20 48 89 1c 24 4c 89 44 24 08 48 89 7c 24 10 e8 23 9c ff ff 0f b6 44 24 18 84 c0 75 9f c6 44 24 48 <00> 48 8b 6c 24 28 48 83 c4 30 c3 c6 44 24 48 01 48 8b 6c 24 28 48 RSP: 002b:00007f034ea70c58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000045f50a RDX: 0000000000002f5f RSI: 00007f034ea70c60 RDI: 0000000000000001 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000000c5 R14: 00000000004c338e R15: 000000000076bf2c