INFO: task kworker/0:6:5137 blocked for more than 143 seconds. Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:6 state:D stack:23152 pid:5137 tgid:5137 ppid:2 flags:0x00004000 Workqueue: events reg_todo Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x1796/0x49d0 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 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+0x6a4/0xd70 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5966 [inline] reg_process_self_managed_hints+0xb9/0x1a0 net/wireless/reg.c:3206 reg_todo+0x7d2/0x8d0 net/wireless/reg.c:3219 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/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: 2 locks held by kthreadd/2: 3 locks held by kworker/u8:0/11: 3 locks held by kworker/u8:1/12: 9 locks held by kworker/1:0/25: 1 lock held by khungtaskd/30: #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 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/u8:4/62: 3 locks held by kworker/u8:5/743: 3 locks held by kworker/1:2/930: 3 locks held by kworker/u8:6/1055: 3 locks held by kworker/u8:7/2419: 3 locks held by kworker/u8:9/2448: 3 locks held by kworker/u8:10/2486: 3 locks held by kworker/R-ipv6_/2622: #0: ffff88802a551948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff88802a551948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90009427ca0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc90009427ca0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5d4c88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733 4 locks held by kworker/R-bat_e/2756: 2 locks held by syslogd/4516: 2 locks held by klogd/4523: 4 locks held by udevd/4534: 3 locks held by dhcpcd/4747: 2 locks held by getty/4836: #0: ffff88802abf70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/5071: 3 locks held by syz-executor/5080: 1 lock held by syz-executor/5081: 2 locks held by syz-executor/5091: 4 locks held by kworker/0:6/5137: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90004557d00 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc90004557d00 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5d4c88 (rtnl_mutex){+.+.}-{3:3}, at: reg_todo+0x1c/0x8d0 net/wireless/reg.c:3216 #3: ffff888070f20768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5966 [inline] #3: ffff888070f20768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: reg_process_self_managed_hints+0xb9/0x1a0 net/wireless/reg.c:3206 3 locks held by kworker/0:7/5138: 2 locks held by kworker/1:4/5139: 3 locks held by kworker/0:8/5175: #0: ffff888015081948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015081948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900045f7d00 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900045f7d00 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5d4c88 (rtnl_mutex){+.+.}-{3:3}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:540 6 locks held by syz.1.113/5479: 4 locks held by syz-executor/5501: 3 locks held by syz.3.121/5505: 3 locks held by kworker/1:6/5517: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #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+0x241/0x360 lib/dump_stack.c:114 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:223 [inline] watchdog+0xfde/0x1020 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2756 Comm: kworker/R-bat_e Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: bat_events batadv_tt_purge RIP: 0010:lock_is_held include/linux/lockdep.h:231 [inline] RIP: 0010:rcu_read_lock_held+0x2f/0x50 kernel/rcu/update.c:351 Code: e8 96 3c 02 0a 85 c0 74 26 31 db e8 7b 55 01 00 84 c0 74 20 e8 32 a8 01 00 84 c0 74 17 48 c7 c7 60 3f 33 8e be ff ff ff ff 5b 9c 38 02 0a bb 01 00 00 00 89 d8 5b c3 cc cc cc cc 66 2e 0f 1f RSP: 0018:ffffc90000a180b8 EFLAGS: 00000202 RAX: 1ffffffff1c67101 RBX: 0000000000000001 RCX: 0000000080000101 RDX: ffff88802b06da00 RSI: 00000000ffffffff RDI: ffffffff8e333f60 RBP: ffff88802af788b8 R08: ffffffff89548426 R09: ffffc90000a183f0 R10: ffffc90000a183e0 R11: fffff5200014304a R12: ffff888023d3a000 R13: ffff88802af788cf R14: 1ffff110055ef119 R15: 1ffff110055ef117 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6d3a600000 CR3: 000000002b196000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __in6_dev_get include/net/addrconf.h:324 [inline] ip6_ignore_linkdown include/net/addrconf.h:415 [inline] find_match+0xf9/0xc10 net/ipv6/route.c:746 __find_rr_leaf+0x275/0x8e0 net/ipv6/route.c:834 find_rr_leaf net/ipv6/route.c:855 [inline] rt6_select net/ipv6/route.c:899 [inline] fib6_table_lookup+0x413/0xbb0 net/ipv6/route.c:2197 ip6_pol_route+0x273/0x15d0 net/ipv6/route.c:2233 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x58c/0x790 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup net/ipv6/route.c:2302 [inline] ip6_route_input+0x859/0xd90 net/ipv6/route.c:2598 ip6_rcv_finish+0x144/0x180 net/ipv6/ip6_input.c:77 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5625 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5739 process_backlog+0x391/0x7d0 net/core/dev.c:6068 __napi_poll+0xcb/0x490 net/core/dev.c:6722 napi_poll net/core/dev.c:6791 [inline] net_rx_action+0x7bb/0x10a0 net/core/dev.c:6907 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x2a0/0x340 net/batman-adv/translation-table.c:1356 batadv_tt_purge+0x35/0xa40 net/batman-adv/translation-table.c:3560 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 rescuer_thread+0x618/0xda0 kernel/workqueue.c:3505 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244