INFO: task syz.2.19:4521 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:0 pid:4521 ppid:4464 flags:0x00000001 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6697 rwsem_down_read_slowpath+0x4b8/0x79c kernel/locking/rwsem.c:1094 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read+0xa8/0x300 kernel/locking/rwsem.c:1522 inode_lock_shared include/linux/fs.h:768 [inline] open_last_lookups fs/namei.c:3557 [inline] path_openat+0x5e4/0x26bc fs/namei.c:3788 do_filp_open+0x194/0x384 fs/namei.c:3818 do_sys_openat2+0x134/0x3f4 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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: 3 locks held by kworker/u4:0/9: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001c9c7c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153f7c30 (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: ffff8000153f8450 (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: ffff8000153f72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by kworker/u4:2/39: 4 locks held by kworker/u4:3/55: #0: ffff0000c0845138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001cfe7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff8000178840d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x134/0xa84 net/core/net_namespace.c:594 #3: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by udevd/3935: 2 locks held by getty/4078: #0: ffff0000d723e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001df962f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 3 locks held by kworker/1:6/4447: #0: ffff0000d6ae9138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020c87c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 3 locks held by kworker/1:7/4448: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020d67c20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.2.19/4520: 1 lock held by syz.2.19/4521: #0: ffff0000eb8c4188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000eb8c4188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff0000eb8c4188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.0.17/4548: 1 lock held by syz.0.17/4553: #0: ffff00010e61c188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61c188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61c188 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.3.20/4550: 1 lock held by syz.3.20/4554: #0: ffff0000eb8c46d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000eb8c46d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff0000eb8c46d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.1.18/4556: 1 lock held by syz.1.18/4557: #0: ffff0000eb8c4c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000eb8c4c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff0000eb8c4c18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.4.21/4559: 1 lock held by syz.4.21/4560: #0: ffff00010e61c6d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61c6d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61c6d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.5.22/4584: 1 lock held by syz.5.22/4585: #0: ffff00010e61cc18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61cc18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61cc18 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.6.23/4688: 1 lock held by syz.6.23/4689: #0: ffff00010e61d160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61d160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61d160 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 2 locks held by syz.9.26/4692: 1 lock held by syz.9.26/4693: #0: ffff00010e61d6a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61d6a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61d6a8 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.8.25/4695: 1 lock held by syz.8.25/4696: #0: ffff00010e61dbf0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61dbf0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61dbf0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz.7.24/4698: 1 lock held by syz.7.24/4699: #0: ffff00010e61e138 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff00010e61e138 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #0: ffff00010e61e138 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x5e4/0x26bc fs/namei.c:3788 1 lock held by syz-executor/9528: #0: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017890988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x650/0xcdc net/core/rtnetlink.c:6154 2 locks held by kworker/u4:8/10048: =============================================