INFO: task kworker/1:0:25 blocked for more than 144 seconds. Not tainted 6.14.0-rc1-next-20250205-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23072 pid:25 tgid:25 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:5377 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6764 __schedule_loop kernel/sched/core.c:6841 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6856 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913 __mutex_lock_common kernel/locking/mutex.c:662 [inline] __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730 class_wiphy_constructor include/net/cfg80211.h:6061 [inline] reg_leave_invalid_chans net/wireless/reg.c:2468 [inline] reg_check_chans_work+0x164/0xfb0 net/wireless/reg.c:2483 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Showing all locks held in the system: 1 lock held by kthreadd/2: 5 locks held by kworker/0:0/8: 2 locks held by kworker/0:1/9: 3 locks held by kworker/u8:0/11: 3 locks held by kworker/u8:1/12: 1 lock held by kworker/R-mm_pe/13: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2676 4 locks held by kworker/1:0/25: #0: ffff88801ac81d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801ac81d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317 #1: ffffc900001f7c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900001f7c60 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317 #2: ffffffff8fcc4448 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x99/0xfb0 net/wireless/reg.c:2480 #3: ffff88807f380768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline] #3: ffff88807f380768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2468 [inline] #3: ffff88807f380768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x164/0xfb0 net/wireless/reg.c:2483 1 lock held by khungtaskd/30: #0: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746 1 lock held by kworker/R-write/32: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2676 3 locks held by kworker/u8:2/33: 2 locks held by kworker/1:1/46: 3 locks held by kworker/u8:3/52: 3 locks held by kworker/u8:4/63: 3 locks held by kworker/u8:5/64: 3 locks held by kworker/u8:6/1010: 1 lock held by kworker/R-dm_bu/2812: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2676 3 locks held by kworker/u8:7/2962: 3 locks held by kworker/R-ipv6_/3169: #0: ffff88814dac9148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88814dac9148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317 #1: ffffc9000ba0fbe0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000ba0fbe0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317 #2: ffffffff8fcc4448 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline] #2: ffffffff8fcc4448 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4730 5 locks held by kworker/R-bat_e/3399: 3 locks held by kworker/u8:8/4171: 1 lock held by syslogd/5185: 1 lock held by klogd/5192: 2 locks held by udevd/5203: 4 locks held by dhcpcd/5497: 3 locks held by dhcpcd/5498: 2 locks held by getty/5587: #0: ffff88814dcd70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/5827: 2 locks held by syz-executor/5838: 1 lock held by syz-executor/5839: 2 locks held by syz-executor/5842: 2 locks held by syz-executor/5854: 1 lock held by kworker/R-wg-cr/5866: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 1 lock held by kworker/R-wg-cr/5869: 2 locks held by kworker/R-wg-cr/5871: 1 lock held by kworker/R-wg-cr/5873: 1 lock held by kworker/R-wg-cr/5875: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 1 lock held by kworker/R-wg-cr/5876: 1 lock held by kworker/R-wg-cr/5877: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 1 lock held by kworker/R-wg-cr/5878: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 1 lock held by kworker/R-wg-cr/5879: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2676 1 lock held by kworker/R-wg-cr/5881: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 1 lock held by kworker/R-wg-cr/5884: #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2734 [inline] #0: ffffffff8e7e3fc8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa21/0xf90 kernel/workqueue.c:3527 3 locks held by kworker/0:3/5886: 2 locks held by kworker/1:4/5889: 3 locks held by kworker/0:4/5891: 2 locks held by kworker/1:6/5892: 4 locks held by kworker/0:5/5893: 4 locks held by kworker/0:6/5935: 2 locks held by udevd/5967: 3 locks held by udevd/6690: 2 locks held by syz.1.450/7251: 3 locks held by kworker/u8:9/7255: 6 locks held by kworker/1:7/7256: 4 locks held by kworker/u8:10/7258: 4 locks held by kworker/u8:11/7259: 3 locks held by kworker/u8:12/7260: 3 locks held by kworker/u8:13/7261: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-next-20250205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 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:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] watchdog+0x1058/0x10a0 kernel/hung_task.c:399 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 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 UID: 0 PID: 3399 Comm: kworker/R-bat_e Not tainted 6.14.0-rc1-next-20250205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: bat_events batadv_tt_purge RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0018:ffffc90000007510 EFLAGS: 00000282 RAX: ffffffff8abefd01 RBX: 1ffff92000000ebc RCX: ffffffff8abefe01 RDX: 0000000000000001 RSI: 0000000000000030 RDI: ffffc900000075e0 RBP: fffffffffffffffe R08: ffffc9000000760f R09: 1ffff92000000ec1 R10: dffffc0000000000 R11: fffff52000000ec0 R12: ffff88804f7ecc90 R13: 1ffff11009efd992 R14: dffffc0000000001 R15: fffff52000000ec2 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc293400000 CR3: 0000000032a0e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 nf_hook_bridge_pre net/bridge/br_input.c:262 [inline] br_handle_frame+0x7a1/0x1530 net/bridge/br_input.c:433 __netif_receive_skb_core+0x13e7/0x4540 net/core/dev.c:5722 __netif_receive_skb_one_core net/core/dev.c:5826 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5941 process_backlog+0x662/0x15b0 net/core/dev.c:6289 __napi_poll+0xcb/0x490 net/core/dev.c:7106 napi_poll net/core/dev.c:7175 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7297 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x2a0/0x340 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x35/0xa40 net/batman-adv/translation-table.c:3509 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317 rescuer_thread+0x650/0xf90 kernel/workqueue.c:3494 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244