INFO: task syz.4.21:4667 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.21 state:D stack:0 pid:4667 ppid:4637 flags:0x00000001 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6696 rwsem_down_read_slowpath+0x4ac/0x788 kernel/locking/rwsem.c:1094 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read+0xa8/0x304 kernel/locking/rwsem.c:1522 inode_lock_shared include/linux/fs.h:768 [inline] lookup_slow+0x4c/0x80 fs/namei.c:1714 walk_component+0x270/0x364 fs/namei.c:2006 lookup_last fs/namei.c:2463 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2487 filename_lookup+0x190/0x42c fs/namei.c:2516 user_path_at_empty+0x5c/0x84 fs/namei.c:2913 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xb8/0x25c fs/xattr.c:631 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 INFO: task syz.5.22:4699 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.5.22 state:D stack:0 pid:4699 ppid:4669 flags:0x00000001 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6696 rwsem_down_read_slowpath+0x4ac/0x788 kernel/locking/rwsem.c:1094 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read+0xa8/0x304 kernel/locking/rwsem.c:1522 inode_lock_shared include/linux/fs.h:768 [inline] lookup_slow+0x4c/0x80 fs/namei.c:1714 walk_component+0x270/0x364 fs/namei.c:2006 lookup_last fs/namei.c:2463 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2487 filename_lookup+0x190/0x42c fs/namei.c:2516 user_path_at_empty+0x5c/0x84 fs/namei.c:2913 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xb8/0x25c fs/xattr.c:631 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015227d70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff800015228590 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff800015227400 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4079: #0: ffff0000d12d3098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001ce262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 1 lock held by syz.1.18/4584: 2 locks held by syz.2.19/4608: 2 locks held by syz.3.20/4635: 1 lock held by syz.4.21/4666: 1 lock held by syz.4.21/4667: #0: ffff00010f2846d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010f2846d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.5.22/4698: 1 lock held by syz.5.22/4699: #0: ffff0000e5349160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e5349160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.6.23/4737: 1 lock held by syz.6.23/4738: #0: ffff00010f284c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010f284c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 2 locks held by syz.7.24/4769: 1 lock held by syz.7.24/4770: #0: ffff0000e53496a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e53496a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 1 lock held by syz.8.25/4802: 1 lock held by syz.8.25/4803: #0: ffff0000e5349bf0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e5349bf0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 2 locks held by syz.9.26/4834: 1 lock held by syz.9.26/4835: #0: ffff00010f285160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010f285160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 2 locks held by kworker/u4:6/4904: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff00019f75ebc8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x380/0x608 kernel/sched/psi.c:999 1 lock held by syz.0.27/4965: 1 lock held by syz.0.27/4966: #0: ffff00010f2856a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010f2856a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 2 locks held by udevd/4969: 1 lock held by dhcpcd/5304: #0: ffff0000fff03210 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000fff03210 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff0000fff03210 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: sock_close+0x7c/0x1f8 net/socket.c:1400 =============================================