INFO: task udevd:5197 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:21632 pid:5197 tgid:5197 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 lookup_fast+0x1f6/0x4a0 walk_component fs/namei.c:2108 [inline] link_path_walk+0x672/0xea0 fs/namei.c:2477 path_openat+0x266/0x3590 fs/namei.c:3983 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9e3582477 RSP: 002b:00007ffcd40e50b8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000055c029576e80 RCX: 00007fa9e3582477 RDX: 0000000000090800 RSI: 000055c02955f9d0 RDI: 00000000ffffff9c RBP: 000055c0296ba570 R08: 0000000000090800 R09: 000055c02955f9d0 R10: 0000000000000000 R11: 0000000000000287 R12: 000055c02955f9d0 R13: 00000000000000fd R14: 000055c025ece1c4 R15: 0000000000000000 INFO: task udevd:5888 blocked for more than 144 seconds. Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:24192 pid:5888 tgid:5888 ppid:5197 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 lookup_fast+0x1f6/0x4a0 walk_component fs/namei.c:2108 [inline] link_path_walk+0x672/0xea0 fs/namei.c:2477 path_openat+0x266/0x3590 fs/namei.c:3983 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9e357e9a4 RSP: 002b:00007ffcd40dc590 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fa9e357e9a4 RDX: 0000000000080000 RSI: 00007ffcd40dc6c8 RDI: 00000000ffffff9c RBP: 00007ffcd40dc6c8 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 000055c025ec7b42 R14: 0000000000000001 R15: 000055c025ee3160 INFO: task udevd:6791 blocked for more than 145 seconds. Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:21632 pid:6791 tgid:6791 ppid:5197 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 lookup_fast+0x1f6/0x4a0 walk_component fs/namei.c:2108 [inline] link_path_walk+0x672/0xea0 fs/namei.c:2477 path_lookupat+0xa9/0x450 fs/namei.c:2633 filename_lookup+0x2a3/0x670 fs/namei.c:2663 vfs_statx+0x103/0x490 fs/stat.c:344 vfs_fstatat+0xe5/0x130 fs/stat.c:366 __do_sys_newfstatat fs/stat.c:530 [inline] __se_sys_newfstatat fs/stat.c:524 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:524 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9e357e5f4 RSP: 002b:00007ffcd40ded38 EFLAGS: 00000206 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 000055c02956ed20 RCX: 00007fa9e357e5f4 RDX: 00007ffcd40ded48 RSI: 00007ffcd40dedd8 RDI: 00000000ffffff9c RBP: 000055c02957da0f R08: 000055c02957da0f R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 0000000000000000 R13: 000055c02956ee10 R14: 00007ffcd40dedd8 R15: 000055c025ee3160 INFO: task rm:8591 blocked for more than 146 seconds. Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:rm state:D stack:22784 pid:8591 tgid:8591 ppid:8557 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 lookup_fast+0x1f6/0x4a0 walk_component fs/namei.c:2108 [inline] link_path_walk+0x672/0xea0 fs/namei.c:2477 path_lookupat+0xa9/0x450 fs/namei.c:2633 filename_lookup+0x2a3/0x670 fs/namei.c:2663 user_path_at+0x3a/0x60 fs/namei.c:3070 user_statfs+0xd6/0x460 fs/statfs.c:103 __do_sys_statfs fs/statfs.c:193 [inline] __se_sys_statfs fs/statfs.c:190 [inline] __x64_sys_statfs+0xe8/0x1a0 fs/statfs.c:190 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3e95db968a RSP: 002b:00007fff087afd28 EFLAGS: 00000246 ORIG_RAX: 0000000000000089 RAX: ffffffffffffffda RBX: 00007f3e95cde4f8 RCX: 00007f3e95db968a RDX: 00007f3e95ce019c RSI: 00007fff087afda0 RDI: 00007f3e95cd6723 RBP: 00007f3e95cd6723 R08: 0000000000000000 R09: 000000000000000d R10: 00007fff087afb50 R11: 0000000000000246 R12: 00007fff087afda0 R13: 00007fff087aff18 R14: 00007fff087aff38 R15: 0000000000000000 Showing all locks held in the system: 4 locks held by kworker/0:1/9: 1 lock held by khungtaskd/30: #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 5 locks held by kworker/u9:0/54: #0: ffff8880324f2948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff8880324f2948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000be7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000be7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff8880341b8d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff8880341b8078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 3 locks held by kworker/u8:5/81: #0: ffff88814d4b7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88814d4b7148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000217fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000217fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fcaf448 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4755 3 locks held by kworker/0:2/968: #0: ffff88801ac79948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac79948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90003a37d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003a37d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fcaf448 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x99/0xfb0 net/wireless/reg.c:2480 5 locks held by kworker/u9:1/5136: #0: ffff88801e6f8148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801e6f8148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000fd9fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000fd9fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff888012bccd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff888012bcc078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 2 locks held by klogd/5186: 1 lock held by udevd/5197: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 2 locks held by getty/5579: #0: ffff8880349a20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/5824: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/5825: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 5 locks held by kworker/u9:2/5826: #0: ffff888033d47148 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888033d47148 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90003367d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003367d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff888034d4cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff888034d4c078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 1 lock held by syz-executor/5827: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/5832: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 5 locks held by kworker/u9:4/5838: #0: ffff88807f1e4948 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88807f1e4948 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc900032e7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc900032e7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff88804eb68d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff88804eb68078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 5 locks held by kworker/u9:7/5843: #0: ffff888074c4e948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888074c4e948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90003297d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003297d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff888029db0d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff888029db0078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 5 locks held by kworker/u9:11/5849: #0: ffff888027510148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888027510148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90003237d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003237d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffff88806147cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331 #3: ffff88806147c078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1ea/0xe00 net/bluetooth/hci_sync.c:5584 #4: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 5 locks held by kworker/0:3/5882: 1 lock held by udevd/5888: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 2 locks held by kworker/0:5/5892: 2 locks held by kworker/0:6/5905: 1 lock held by syz-executor/6374: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/6664: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by udevd/6791: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by rm/8591: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz.5.907/8611: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778 2 locks held by syz.6.908/8610: #0: ffff88802529db60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:120 [inline] #0: ffff88802529db60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_configure+0x1f7/0xeb0 drivers/block/loop.c:1044 #1: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778 2 locks held by syz.4.915/8628: #0: ffff8880251eeb60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:120 [inline] #0: ffff8880251eeb60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_configure+0x1f7/0xeb0 drivers/block/loop.c:1044 #1: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778 1 lock held by syz.1.920/8637: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 3 locks held by syz.7.926/8651: #0: ffffffff8fcaf448 (rtnl_mutex){+.+.}-{4:4}, at: dev_ioctl+0x639/0x1340 net/core/dev_ioctl.c:736 #1: ffffffff8fca6990 (devnet_rename_sem){+.+.}-{4:4}, at: dev_change_name+0x10f/0x920 net/core/dev.c:1224 #2: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918 2 locks held by syz.2.927/8653: #0: ffff888024f27b60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:120 [inline] #0: ffff888024f27b60 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_configure+0x1f7/0xeb0 drivers/block/loop.c:1044 #1: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778 1 lock held by syz-executor/8654: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/8655: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 1 lock held by syz-executor/8656: #0: ffff88801baee948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159 2 locks held by syz-executor/8657: 2 locks held by syz-executor/8658: 2 locks held by syz-executor/8659: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 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: 5938 Comm: kworker/0:8 Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_power_efficient gc_worker RIP: 0010:lockdep_hardirqs_on_prepare+0x6ba/0x780 kernel/locking/lockdep.c:4393 Code: b3 fc ff ff 4c 89 f7 e8 84 e5 8f 00 48 ba 00 00 00 00 00 fc ff df e9 9c fc ff ff 48 c7 c1 c0 f9 3b 9a 80 e1 07 80 c1 03 38 c1 <0f> 8c 8a fa ff ff 48 c7 c7 c0 f9 3b 9a e8 54 e5 8f 00 48 ba 00 00 RSP: 0018:ffffc90002f678e0 EFLAGS: 00000097 RAX: 0000000000000004 RBX: 1ffff920005ecf24 RCX: ffffffff9a3bf903 RDX: dffffc0000000000 RSI: ffffffff8c5f63c0 RDI: ffffffff8c5f6380 RBP: ffffc90002f67988 R08: ffffffff901945f7 R09: 1ffffffff20328be R10: dffffc0000000000 R11: fffffbfff20328bf R12: ffffffff89e845d6 R13: 0000000000000200 R14: ffffc90002f67920 R15: 1ffff920005ecf20 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4e433ee440 CR3: 000000000e736000 CR4: 0000000000350ef0 Call Trace: trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:47 native_save_fl arch/x86/include/asm/irqflags.h:19 [inline] arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline] arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline] seqcount_lockdep_reader_access+0x157/0x220 include/linux/seqlock.h:74 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline] gc_worker+0x316/0x1530 net/netfilter/nf_conntrack_core.c:1534 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244