INFO: task kworker/1:2:4500 blocked for more than 155 seconds. Not tainted 6.10.0-rc6-syzkaller-00215-g22f902dfc51e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:23664 pid:4500 tgid:4500 ppid:2 flags:0x00004000 Workqueue: events_power_efficient crda_timeout_work Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 crda_timeout_work+0x15/0x50 net/wireless/reg.c:540 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248 process_scheduled_works kernel/workqueue.c:3329 [inline] worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 4 locks held by kworker/0:0/8: 3 locks held by kworker/u8:0/11: 3 locks held by kworker/u8:1/12: 3 locks held by kworker/1:0/25: 1 lock held by khungtaskd/30: #0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:2/35: 3 locks held by kworker/u8:3/51: 3 locks held by kworker/u8:4/61: 4 locks held by kworker/u8:5/744: 3 locks held by kworker/0:2/929: #0: ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223 #1: ffffc900041ffd80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224 #2: ffffffff8f748268 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x10e0 net/wireless/reg.c:2478 3 locks held by kworker/u8:6/1058: 3 locks held by kworker/u8:7/1201: 3 locks held by kworker/u8:9/2463: 3 locks held by kworker/u8:10/2807: 4 locks held by kworker/u8:12/2857: 3 locks held by kworker/u8:13/2889: #0: ffff88802a6b8148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223 #1: ffffc90009f07d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224 #2: ffffffff8f748268 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733 3 locks held by kworker/1:2/4500: #0: ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223 #1: ffffc9000d6a7d80 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224 #2: ffffffff8f748268 (rtnl_mutex){+.+.}-{3:3}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:540 2 locks held by getty/4834: #0: ffff88802ab5c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/5081: 2 locks held by kworker/1:3/5087: 2 locks held by kworker/1:4/5133: 4 locks held by kworker/1:7/5165: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223 #1: ffffc9000359fd80 (reg_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224 #2: ffffffff8f748268 (rtnl_mutex){+.+.}-{3:3}, at: reg_todo+0x1c/0x910 net/wireless/reg.c:3216 #3: ffff888060fd8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5966 [inline] #3: ffff888060fd8768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_process_self_managed_hints+0x95/0x1e0 net/wireless/reg.c:3206 5 locks held by syz.4.122/5675: 1 lock held by syz.3.124/5684: 2 locks held by syz-executor/5700: 2 locks held by syz-executor/5703: 2 locks held by dhcpcd/5708: #0: ffff888078e76810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #0: ffff888078e76810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x270 net/socket.c:658 #1: ffffffff8dbbcdb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:291 2 locks held by syz-executor/5709: 2 locks held by dhcpcd/5710: #0: ffff88802368e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1602 [inline] #0: ffff88802368e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3201 #1: ffffffff8dbbcdb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:323 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-syzkaller-00215-g22f902dfc51e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf86/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.10.0-rc6-syzkaller-00215-g22f902dfc51e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events_power_efficient gc_worker RIP: 0010:check_region_inline mm/kasan/generic.c:174 [inline] RIP: 0010:kasan_check_range+0x1b/0x1a0 mm/kasan/generic.c:189 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 55 53 <0f> 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 b3 RSP: 0018:ffffc900000d79f0 EFLAGS: 00000082 RAX: ffffffff94265308 RBX: 0000000000000214 RCX: ffffffff816ae7ce RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff94265300 RBP: ffffc900000d7b58 R08: 0000000000000000 R09: fffffbfff284ca6a R10: ffffffff94265357 R11: 0000000000000003 R12: ffff8880176ada00 R13: 0000000000000040 R14: 0000000000000006 R15: 1ffff9200001af4a FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdcc0fa3ca0 CR3: 0000000061d76000 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] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4656 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4300 [inline] lockdep_hardirqs_on_prepare+0x27a/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 seqcount_lockdep_reader_access include/linux/seqlock.h:74 [inline] nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline] gc_worker+0xe9f/0x1770 net/netfilter/nf_conntrack_core.c:1488 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248 process_scheduled_works kernel/workqueue.c:3329 [inline] worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244