INFO: task kworker/1:4:5129 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:21808 pid:5129 tgid:5129 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5951 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x1080 net/wireless/reg.c:2481 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Showing all locks held in the system: 1 lock held by kthreadd/2: 4 locks held by kworker/0:0/7: #0: ffff88802c889548 ((wq_completion)wg-kex-wg0#8){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc900000c7d80 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)((worker)))); (typeof((typeof(*((worker))) *)((worker)))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffff88802c471228 (&wg->static_identity.lock){++++}-{3:3}, at: wg_noise_handshake_consume_initiation+0x1c3/0x880 drivers/net/wireguard/noise.c:598 #3: ffff888060f84e38 (&handshake->lock){++++}-{3:3}, at: wg_noise_handshake_consume_initiation+0x5ae/0x880 drivers/net/wireguard/noise.c:632 3 locks held by kworker/u8:0/10: 3 locks held by kworker/u8:1/11: 1 lock held by kworker/R-mm_pe/12: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 2 locks held by kworker/1:0/24: 1 lock held by khungtaskd/29: #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 1 lock held by kworker/R-write/31: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2712 3 locks held by kworker/u8:2/35: #0: ffff8880298f7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc90000ab7d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4731 2 locks held by kworker/1:1/44: 3 locks held by kworker/u8:3/50: 3 locks held by kworker/u8:5/80: 4 locks held by kworker/1:2/782: 5 locks held by kworker/0:2/927: 3 locks held by kworker/u8:6/1083: 3 locks held by kworker/u8:7/1096: 1 lock held by kworker/R-mld/2613: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 5 locks held by kworker/R-bat_e/2748: 2 locks held by kworker/u8:8/2813: 2 locks held by jbd2/sda1-8/4476: 3 locks held by syslogd/4495: 1 lock held by klogd/4502: 3 locks held by dhcpcd/4726: 2 locks held by dhcpcd/4727: 2 locks held by getty/4816: #0: ffff88802dfa00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015e02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by kworker/1:3/5053: 2 locks held by syz-fuzzer/5055: 2 locks held by syz-fuzzer/5058: 3 locks held by syz-fuzzer/5061: 3 locks held by syz-fuzzer/5073: 4 locks held by syz-fuzzer/5163: 1 lock held by syz-executor.0/5076: 4 locks held by syz-executor.4/5092: 1 lock held by kworker/R-wg-cr/5112: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5113: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5115: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5116: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5117: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5118: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5120: 2 locks held by kworker/0:3/5124: 1 lock held by kworker/R-wg-cr/5126: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 1 lock held by kworker/R-wg-cr/5127: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_detach_from_pool+0x95/0x3f0 kernel/workqueue.c:2751 4 locks held by kworker/1:4/5129: #0: ffff888015079948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc9000407fd80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x1080 net/wireless/reg.c:2478 #3: ffff88801c728768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5951 [inline] #3: ffff88801c728768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] #3: ffff88801c728768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_check_chans_work+0x10a/0x1080 net/wireless/reg.c:2481 4 locks held by kworker/1:5/5131: 3 locks held by kworker/0:4/5132: 3 locks held by kworker/0:7/5135: 1 lock held by kworker/0:8/5162: #0: ffffffff8d66a0c8 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2712 5 locks held by kworker/1:6/5184: 1 lock held by syz-executor.1/5360: 6 locks held by syz-executor.3/8573: 1 lock held by syz-executor.2/8580: 4 locks held by kworker/u8:9/8582: 2 locks held by kworker/1:7/8584: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf86/0x1210 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2748 Comm: kworker/R-bat_e Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: bat_events batadv_purge_orig RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline] RIP: 0010:stack_access_ok+0x2f/0x270 arch/x86/kernel/unwind_orc.c:393 Code: 55 41 54 55 48 89 f5 53 48 89 fb 4c 8d 63 08 48 83 ec 10 48 89 54 24 08 e8 3e 64 50 00 4c 89 e2 48 b8 00 00 00 00 00 fc ff df <48> c1 ea 03 80 3c 02 00 0f 85 09 02 00 00 4c 8d 6b 10 4c 8b 73 08 RSP: 0018:ffffc900000075c0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90000007688 RCX: ffffffff813c9d91 RDX: ffffc90000007690 RSI: ffffffff813c9472 RDI: ffffc90000007688 RBP: ffffc90000007ff8 R08: 0000000000000001 R09: 0000000000000009 R10: 0000000000000009 R11: 0000000000000004 R12: ffffc90000007690 R13: ffffc90000007ff8 R14: ffffffff902bcbdc R15: ffffc900000076bd FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb4bc13a968 CR3: 0000000023798000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline] unwind_next_frame+0xa1a/0x23a0 arch/x86/kernel/unwind_orc.c:573 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_node+0x177/0x340 mm/slub.c:3888 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:577 __alloc_skb+0x164/0x380 net/core/skbuff.c:668 __netdev_alloc_skb+0x72/0x3f0 net/core/skbuff.c:732 netdev_alloc_skb include/linux/skbuff.h:3306 [inline] dev_alloc_skb include/linux/skbuff.h:3319 [inline] __ieee80211_beacon_get+0xc1f/0x16b0 net/mac80211/tx.c:5466 ieee80211_beacon_get_tim+0xa7/0x280 net/mac80211/tx.c:5588 ieee80211_beacon_get include/net/mac80211.h:5552 [inline] mac80211_hwsim_beacon_tx+0x48d/0x880 drivers/net/wireless/virtual/mac80211_hwsim.c:2296 __iterate_interfaces+0x2d2/0x580 net/mac80211/util.c:772 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:808 mac80211_hwsim_beacon+0x105/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2326 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1756 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1773 __do_softirq+0x218/0x8de kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_purge_orig_ref+0xec0/0x1520 net/batman-adv/originator.c:1287 batadv_purge_orig+0x19/0x60 net/batman-adv/originator.c:1300 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] rescuer_thread+0x624/0xcf0 kernel/workqueue.c:3512 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243