INFO: task udevd:6668 blocked for more than 149 seconds. Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:6668 tgid:6668 ppid:6139 task_flags:0x400140 flags:0x00000008 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5397 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6786 __schedule_loop kernel/sched/core.c:6864 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6879 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6936 rwsem_down_write_slowpath+0xa80/0x10f0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write_nested+0xc0/0xcc kernel/locking/rwsem.c:1694 inode_lock_nested include/linux/fs.h:914 [inline] lock_rename fs/namei.c:3281 [inline] do_renameat2+0x388/0xa40 fs/namei.c:5232 __do_sys_renameat fs/namei.c:5327 [inline] __se_sys_renameat fs/namei.c:5324 [inline] __arm64_sys_renameat+0xc0/0xdc fs/namei.c:5324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 5 locks held by kworker/u8:1/15: 4 locks held by kworker/1:0/24: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff800097b67bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000dcc30768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000dcc30768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 1 lock held by khungtaskd/32: #0: ffff80008f869980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 1 lock held by kswapd0/74: 3 locks held by kworker/u8:4/83: 3 locks held by kworker/u8:5/267: 3 locks held by kworker/u8:6/332: 3 locks held by kworker/u8:7/634: 3 locks held by kworker/u8:8/690: 3 locks held by kworker/u8:9/2134: 2 locks held by kworker/1:2/2313: 3 locks held by kworker/R-ipv6_/4170: #0: ffff0000d2a0a948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a0407ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by klogd/6128: 1 lock held by udevd/6139: 2 locks held by dhcpcd/6193: 1 lock held by dhcpcd/6194: 2 locks held by getty/6290: #0: ffff0000d68410a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba4b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by syz-executor/6522: 1 lock held by syz-executor/6528: 4 locks held by kworker/0:2/6529: 1 lock held by syz-exe 1 lock held by syz-executor/6533: 1 lock held by syz-executor/6534: #0: ffff0000cadc40e0 (&type->s_umount_key#30){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000cadc40e0 (&type->s_umount_key#30){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000cadc40e0 (&type->s_umount_key#30){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 2 locks held by kworker/1:3/6536: 2 locks held by kworker/1:4/6578: 2 locks held by kworker/1:5/6592: 5 locks held by kworker/0:5/6629: 3 locks held by udevd/6661: 1 lock held by udevd/6665: 2 locks held by udevd/6668: #0: ffff0000d7e04428 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557 #1: ffff0000d1c6f1d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline] #1: ffff0000d1c6f1d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3281 [inline] #1: ffff0000d1c6f1d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: do_renameat2+0x388/0xa40 fs/namei.c:5232 2 locks held by udevd/6772: 3 locks held by syz.1.100/7195: 1 lock held by kmmpd-loop3/7201: #0: ffff0000cadc4428 (sb_writers#3){.+.+}-{0:0}, at: kmmpd+0x2ec/0x9b8 fs/ext4/mmp.c:178 3 locks held by kworker/u8:10/7216: 2 locks held by kworker/u8:11/7217: 3 locks held by kworker/u8:12/7219: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009f907bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/1:8/7221: 3 locks held by syz-executor/7222: =============================================