INFO: task syz.1.17:5125 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack: 0 pid: 5125 ppid: 4911 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xcb8/0x13f4 kernel/locking/rwsem.c:1165 __down_write_common kernel/locking/rwsem.c:1292 [inline] __down_write kernel/locking/rwsem.c:1301 [inline] down_write+0xe8/0x12c kernel/locking/rwsem.c:1552 inode_lock include/linux/fs.h:787 [inline] open_last_lookups fs/namei.c:3529 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff8000143513a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 2 locks held by kworker/u4:3/352: 2 locks held by getty/3804: #0: ffff0000d0c15098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bd6b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 3 locks held by kworker/0:11/4872: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001fe77c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff0000c7903240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1c8/0x2704 drivers/net/netdevsim/fib.c:1480 1 lock held by syz.1.17/5119: 1 lock held by syz.1.17/5125: #0: ffff0000f1960188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff0000f1960188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff0000f1960188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.0.16/5339: 1 lock held by syz.0.16/5345: #0: ffff0000f19606d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff0000f19606d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff0000f19606d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.2.18/5457: 1 lock held by syz.2.18/5462: #0: ffff00010c144188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c144188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c144188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.4.20/5470: 1 lock held by syz.4.20/5479: #0: ffff00010c1446d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c1446d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c1446d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.3.19/5474: 1 lock held by syz.3.19/5482: #0: ffff0000f1960c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff0000f1960c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff0000f1960c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.5.21/5634: 1 lock held by syz.5.21/5635: #0: ffff00010c144c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c144c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c144c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.6.22/5666: 1 lock held by syz.6.22/5673: #0: ffff00010c145160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c145160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c145160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.8.24/5757: 1 lock held by syz.8.24/5758: #0: ffff00010c1456a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c1456a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c1456a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 1 lock held by syz.7.23/5760: 1 lock held by syz.7.23/5763: #0: ffff00010c146138 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c146138 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c146138 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.9.25/5762: 1 lock held by syz.9.25/5764: #0: ffff00010c145bf0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff00010c145bf0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #0: ffff00010c145bf0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 4 locks held by kworker/u4:7/6328: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff800021e87c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff8000162a2c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa98 net/core/net_namespace.c:589 #3: ffff0000f3bf93e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x114/0x2d4 drivers/net/wireguard/device.c:233 1 lock held by syz-executor/10773: 2 locks held by syz.2.2818/11501: =============================================