INFO: task syz-executor.1:5907 blocked for more than 143 seconds. Not tainted 6.8.0-rc5-syzkaller-00163-gffd2cb6b718e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28400 pid:5907 tgid:5904 ppid:5432 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 blkdev_common_ioctl+0xf7e/0x2880 block/ioctl.c:563 blkdev_ioctl+0x532/0x740 block/ioctl.c:628 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:857 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f23f507cae9 RSP: 002b:00007f23f5d6b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f23f519c050 RCX: 00007f23f507cae9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007f23f50c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f23f519c050 R15: 00007fff44cb8f38 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by kworker/u4:5/1082: 2 locks held by kworker/u4:6/1098: #0: ffff888014c8d538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8d538 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004d97d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004d97d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 2 locks held by getty/4822: #0: ffff88802b0230a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 2 locks held by kworker/0:4/5085: #0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90003dffd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90003dffd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 3 locks held by kworker/1:7/5530: #0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc9000525fd20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc9000525fd20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffff888198269240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489 3 locks held by kworker/0:9/5644: #0: ffff88802aad2938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff88802aad2938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90005a7fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90005a7fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4144 2 locks held by syz-executor.1/5905: 1 lock held by syz-executor.1/5907: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.2/5961: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.2/5962: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.3/5968: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.3/5969: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.0/5977: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.0/5978: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.4/5980: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.4/5981: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.5/6004: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.5/6005: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.1/6022: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.1/6023: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.2/6084: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.2/6085: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.3/6091: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.3/6092: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.0/6100: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.0/6101: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.4/6103: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.4/6104: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.5/6125: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.5/6126: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.1/6143: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.1/6144: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 3 locks held by syz-executor.3/6160: #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6615 #1: ffff88806bc9d3e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50 #2: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #2: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995 1 lock held by syz-executor.0/6168: #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6615 1 lock held by syz-executor.4/6174: #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6615 1 lock held by syz-executor.5/6195: #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6615 1 lock held by syz-executor.2/6198: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 1 lock held by syz-executor.2/6200: #0: ffff88802114aa20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:736 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00163-gffd2cb6b718e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 49 Comm: kworker/u4:3 Not tainted 6.8.0-rc5-syzkaller-00163-gffd2cb6b718e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:kasan_check_range+0x1b8/0x290 mm/kasan/generic.c:189 Code: 4d 01 fb 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b <41> 5c 41 5e 41 5f 5d c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00 RSP: 0018:ffffc90000b9f9d8 EFLAGS: 00000056 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff81727cf8 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88803dc9d7a8 RBP: 0000000000000000 R08: ffff88803dc9d7ab R09: 1ffff11007b93af5 R10: dffffc0000000000 R11: ffffed1007b93af6 R12: dffffc0000000000 R13: 1ffff92000173f4c R14: dffffc0000000001 R15: ffffed1007b93af6 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005603c63e8048 CR3: 000000000df32000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline] debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline] do_raw_spin_unlock+0x58/0x8b0 kernel/locking/spinlock_debug.c:141 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock_irqrestore+0x81/0x140 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] skb_dequeue+0x113/0x150 net/core/skbuff.c:3727 ieee80211_iface_work+0xa95/0xd90 net/mac80211/iface.c:1650 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242