INFO: task syz.9.973:9657 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.973 state:D stack:0 pid:9657 tgid:9653 ppid:6986 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1c04/0x2db8 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7283 request_wait_answer fs/fuse/dev.c:590 [inline] __fuse_request_send fs/fuse/dev.c:604 [inline] __fuse_simple_request+0xac4/0x12f4 fs/fuse/dev.c:699 fuse_simple_request fs/fuse/fuse_i.h:1262 [inline] fuse_lookup_name+0x214/0x660 fs/fuse/dir.c:578 fuse_lookup+0x198/0x354 fs/fuse/dir.c:625 lookup_one_qstr_excl+0xe8/0x200 fs/namei.c:1805 __start_dirop+0xb8/0xf4 fs/namei.c:2916 start_dirop fs/namei.c:2938 [inline] filename_rmdir+0x174/0x3d0 fs/namei.c:5424 __do_sys_unlinkat fs/namei.c:5606 [inline] __se_sys_unlinkat fs/namei.c:5599 [inline] __arm64_sys_unlinkat+0xc8/0x104 fs/namei.c:5599 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 3 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/31: #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 1 lock held by khugepaged/36: 3 locks held by kworker/u8:2/39: 3 locks held by kworker/u8:3/40: 4 locks held by kworker/u8:5/308: #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800092b57c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800092b57c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000f7880780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6646 [inline] #3: ffff0000f7880780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2454 [inline] #3: ffff0000f7880780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x144/0x10e8 net/wireless/reg.c:2469 4 locks held by kworker/u8:6/3188: 3 locks held by kworker/u8:7/3189: 3 locks held by kworker/u8:8/3212: 1 lock held by dhcpcd/4393: 2 locks held by kworker/1:2/4469: 1 lock held by crond/4471: 2 locks held by getty/4489: #0: ffff0000d35090a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000923ab2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf70 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/4720: 2 locks held by kworker/1:7/4806: 2 locks held by kworker/0:7/4945: 2 locks held by kworker/0:8/5055: 2 locks held by syz-executor/6369: 3 locks held by kworker/u8:9/6539: 3 locks held by kworker/u8:10/7273: 3 locks held by kworker/u8:12/7275: #0: ffff0000ce33c940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000ce33c940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093547c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093547c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:13/7276: 3 locks held by kworker/u8:14/7277: 2 locks held by kworker/u8:15/7278: 3 locks held by kworker/u8:17/7280: 3 locks held by kworker/u8:18/7281: 2 locks held by kworker/u8:19/7282: 3 locks held by kworker/u8:23/7286: 3 locks held by kworker/u8:26/7293: 3 locks held by syz-executor/7454: 3 locks held by syz.9.973/9657: #0: ffff0000dc304410 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:493 #1: ffff0000f1351c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline] #1: ffff0000f1351c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop+0xa0/0xf4 fs/namei.c:2914 #2: ffff0000f13520b8 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xd4/0x11c fs/fuse/inode.c:607 2 locks held by syz-executor/9733: =============================================