INFO: task kworker/1:14:11923 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:14 D27312 11923 2 0x80004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4543 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 INFO: task kworker/0:1:32718 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:1 D26984 32718 2 0x80004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 linkwatch_event+0xb/0x60 net/core/link_watch.c:250 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 INFO: task kworker/u4:9:1588 blocked for more than 144 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:9 D25152 1588 2 0x80004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1180 ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186 cleanup_net+0x511/0xa50 net/core/net_namespace.c:603 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 INFO: task syz-executor.2:19450 blocked for more than 144 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27360 19450 7280 0x00004004 Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 sock_do_ioctl+0x24e/0x2f0 net/socket.c:1061 sock_ioctl+0x3ec/0x790 net/socket.c:1199 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca69 Code: Bad RIP value. RSP: 002b:00007ff00856bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e0fc0 RCX: 000000000045ca69 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000009 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000205 R14: 00000000004c44ae R15: 00007ff00856c6d4 INFO: task syz-executor.2:19473 blocked for more than 144 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28680 19473 7280 0x00000004 Call Trace: context_switch kernel/sched/core.c:3366 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4082 schedule+0xd0/0x2a0 kernel/sched/core.c:4157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 sock_do_ioctl+0x24e/0x2f0 net/socket.c:1061 sock_ioctl+0x3ec/0x790 net/socket.c:1199 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca69 Code: Bad RIP value. RSP: 002b:00007ff008508c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e0fc0 RCX: 000000000045ca69 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000007 RBP: 000000000078c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000205 R14: 00000000004c44ae R15: 00007ff0085096d4 Showing all locks held in the system: 4 locks held by kworker/u4:3/33: 1 lock held by khungtaskd/1141: #0: ffffffff899bea40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6739: #0: ffff888096e8a170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 3 locks held by kworker/1:14/11923: #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff88821522a938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90004667dc0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4543 3 locks held by kworker/0:1/32718: #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90001e27dc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:250 4 locks held by kworker/u4:9/1588: #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880a9772938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90017387dc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffffffff8a57d570 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 net/core/net_namespace.c:565 #3: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1180 2 locks held by kworker/0:11/7671: 2 locks held by syz-executor.4/19453: #0: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5458 #1: ffffffff899c2aa0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff899c2aa0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x501/0x620 kernel/rcu/tree_exp.h:856 1 lock held by syz-executor.2/19450: #0: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x24e/0x2f0 net/socket.c:1061 1 lock held by syz-executor.2/19473: #0: ffffffff8a58a4e8 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x24e/0x2f0 net/socket.c:1061 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1141 Comm: khungtaskd Not tainted 5.7.0-rc6-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+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4122 Comm: systemd-journal Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:find_held_lock+0x26/0x110 kernel/locking/lockdep.c:4451 Code: 00 00 00 00 41 57 44 8d 7a ff 49 63 c7 41 56 49 89 ce 48 8d 04 80 41 55 49 89 f5 41 54 4c 8d a4 c7 c8 08 00 00 55 4c 89 e7 53 <89> d3 e8 d3 fa ff ff 85 c0 0f 85 87 00 00 00 49 83 ec 28 83 eb 02 RSP: 0018:ffffc90000007bb8 EFLAGS: 00000006 RAX: 000000000000000a RBX: 1ffff92000000f81 RCX: ffffc90000007c48 RDX: 0000000000000003 RSI: ffffc900059ea7a8 RDI: ffff888092c60ed8 RBP: ffff888092c605c0 R08: ffff888092c605c0 R09: fffffbfff1514f59 R10: ffffffff8a8a7ac7 R11: fffffbfff1514f58 R12: ffff888092c60ed8 R13: ffffc900059ea7a8 R14: ffffc90000007c48 R15: 0000000000000002 FS: 00007f34ab09d8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34a7e83000 CR3: 00000000930e2000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_release kernel/locking/lockdep.c:4642 [inline] lock_release+0x231/0x800 kernel/locking/lockdep.c:4952 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:393 [inline] inet_twsk_kill+0x370/0x4b0 net/ipv4/inet_timewait_sock.c:60 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1786 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x192/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:lock_is_held_type+0x262/0x350 kernel/locking/lockdep.c:4973 Code: 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c2 00 00 00 48 83 3d c7 05 3c 08 00 74 32 48 8b 7c 24 10 57 9d <0f> 1f 44 00 00 48 83 c4 18 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90001637818 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff132980c RBX: ffff888092c605c0 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff899bea40 RDI: 0000000000000282 RBP: ffff888092c605c0 R08: ffff888092c605c0 R09: ffffed1015cc7164 R10: ffff8880ae638b1b R11: ffffed1015cc7163 R12: 0000000000000001 R13: ffff888092c60e88 R14: ffff888092c60e80 R15: ffffffff899bea40 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_held kernel/rcu/update.c:307 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:301 hlist_bl_first_rcu include/linux/rculist_bl.h:24 [inline] __d_lookup_rcu+0x53a/0x6c0 fs/dcache.c:2244 lookup_fast+0xe0/0x6d0 fs/namei.c:1453 walk_component+0xc6/0x6a0 fs/namei.c:1842 link_path_walk.part.0+0x631/0xb50 fs/namei.c:2169 link_path_walk fs/namei.c:2098 [inline] path_parentat.isra.0+0xac/0x1e0 fs/namei.c:2371 filename_parentat.isra.0+0x18c/0x400 fs/namei.c:2393 filename_create+0x9e/0x4a0 fs/namei.c:3427 user_path_create fs/namei.c:3502 [inline] do_mkdirat+0xa0/0x280 fs/namei.c:3640 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f34aa359687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd13d01178 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd13d041e0 RCX: 00007f34aa359687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055891fc348a0 RBP: 00007ffd13d011b0 R08: 000055891eeed3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055891fc348a0 R15: 00007ffd13d017f0