INFO: task kworker/0:3:146 blocked for more than 143 seconds. Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:24688 pid: 146 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4616 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INFO: task syz-executor288:3656 blocked for more than 143 seconds. Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor288 state:D stack:28032 pid: 3656 ppid: 3650 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 tun_detach drivers/net/tun.c:697 [inline] tun_chr_close+0x3a/0x180 drivers/net/tun.c:3454 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f246d567623 RSP: 002b:00007ffe3a9ad298 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f246d567623 RDX: 0000000020000080 RSI: 00000000400454d9 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f246d612e40 R09: 00007f246d612e40 R10: 00007f246d612e40 R11: 0000000000000246 R12: 00007ffe3a9ad2d0 R13: 00007ffe3a9ad2c0 R14: 00007ffe3a9ad2b0 R15: 0000000000000000 INFO: task syz-executor288:3657 blocked for more than 143 seconds. Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor288 state:D stack:27400 pid: 3657 ppid: 3651 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 __tun_chr_ioctl+0x64f/0x3da0 drivers/net/tun.c:3068 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f246d5a51d9 RSP: 002b:00007ffe3a9ad298 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f246d5a51d9 RDX: 0000000020000040 RSI: 00000000400454ca RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f246d612e40 R09: 00007f246d612e40 R10: 00007ffe3a9acd10 R11: 0000000000000246 R12: 00007ffe3a9ad2d0 R13: 00007ffe3a9ad2c0 R14: 00007ffe3a9ad2b0 R15: 0000000000000000 INFO: task syz-executor288:3658 blocked for more than 143 seconds. Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor288 state:D stack:28032 pid: 3658 ppid: 3653 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 __tun_chr_ioctl+0x64f/0x3da0 drivers/net/tun.c:3068 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f246d5a51d9 RSP: 002b:00007ffe3a9ad298 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f246d5a51d9 RDX: 0000000020000040 RSI: 00000000400454ca RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f246d612e40 R09: 00007f246d612e40 R10: 00007ffe3a9acd10 R11: 0000000000000246 R12: 00007ffe3a9ad2d0 R13: 00007ffe3a9ad2c0 R14: 00007ffe3a9ad2b0 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8bd86ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 3 locks held by kworker/0:3/146: #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888025fe4138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90002a17da8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4616 1 lock held by klogd/2971: #0: ffff8880b9a39ed8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544 2 locks held by getty/3297: #0: ffff88801fdad098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d0e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124 2 locks held by syz-executor288/3646: #0: ffffffff8d57b110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:467 #1: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:10171 2 locks held by syz-executor288/3654: #0: ffffffff8d57b110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:467 #1: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:10171 1 lock held by syz-executor288/3655: 1 lock held by syz-executor288/3656: #0: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:697 [inline] #0: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3454 1 lock held by syz-executor288/3657: #0: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x64f/0x3da0 drivers/net/tun.c:3068 1 lock held by syz-executor288/3658: #0: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x64f/0x3da0 drivers/net/tun.c:3068 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc22/0xf90 kernel/hung_task.c:378 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3655 Comm: syz-executor288 Not tainted 5.19.0-rc3-syzkaller-00167-ge65af5403e46 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110 Code: 00 00 be 01 00 00 00 e9 86 79 2e 00 66 0f 1f 44 00 00 b8 01 00 00 00 c3 cc cc cc cc cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc90003357a78 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8b7fbae0 RCX: 0000000000000020 RDX: 1ffffffff16ff75e RSI: 0000000000002f56 RDI: 0000000000000380 RBP: ffff8880b9a27200 R08: 0000000000000005 R09: 000000000000003f R10: 0000000000000020 R11: 0000000000000001 R12: 0000000000002f56 R13: 0000000000000020 R14: ffff8880b9a2a500 R15: 0000000000000000 FS: 0000555556e27300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056432f5aea28 CR3: 0000000072654000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:396 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:478 clockevents_program_event+0x254/0x370 kernel/time/clockevents.c:334 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44 __hrtimer_reprogram kernel/time/hrtimer.c:681 [inline] hrtimer_reprogram+0x38c/0x440 kernel/time/hrtimer.c:866 hrtimer_start_range_ns+0x7af/0xa80 kernel/time/hrtimer.c:1299 hrtimer_start_expires include/linux/hrtimer.h:432 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline] schedule_hrtimeout_range_clock+0x183/0x390 kernel/time/hrtimer.c:2302 usleep_range_state+0x129/0x1b0 kernel/time/timer.c:2132 usleep_range include/linux/delay.h:67 [inline] napi_disable+0xff/0x120 net/core/dev.c:6402 tun_napi_disable drivers/net/tun.c:285 [inline] __tun_detach+0x165/0x1440 drivers/net/tun.c:643 tun_detach drivers/net/tun.c:700 [inline] tun_chr_close+0xc4/0x180 drivers/net/tun.c:3454 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f246d567623 Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 RSP: 002b:00007ffe3a9ad298 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f246d567623 RDX: 0000000020000080 RSI: 00000000400454d9 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f246d612e40 R09: 00007f246d612e40 R10: 00007f246d612e40 R11: 0000000000000246 R12: 00007ffe3a9ad2d0 R13: 00007ffe3a9ad2c0 R14: 00007ffe3a9ad2b0 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: be 01 00 00 00 mov $0x1,%esi 7: e9 86 79 2e 00 jmpq 0x2e7992 c: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 12: b8 01 00 00 00 mov $0x1,%eax 17: c3 retq 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: 89 ff mov %edi,%edi 24: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi) * 2a: c3 retq <-- trapping instruction 2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 53 push %rbx 3d: 89 fb mov %edi,%ebx 3f: 48 rex.W