INFO: task syz.2.19:4525 blocked for more than 143 seconds. Not tainted 6.1.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:0 pid:4525 ppid:4463 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 d_wait_lookup+0x154/0x22c fs/dcache.c:2632 d_alloc_parallel+0x978/0x10e4 fs/dcache.c:2714 lookup_open fs/namei.c:3407 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x6f0/0x2680 fs/namei.c:3780 do_filp_open+0x174/0x344 fs/namei.c:3810 do_sys_openat2+0x128/0x3d8 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1345 __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: ffff800015287770 (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: ffff800015287f90 (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: ffff800015286e00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 3 locks held by kworker/u4:4/1617: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff8000257b7c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 3 locks held by kworker/0:3/3898: #0: ffff0000d6e19d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800025cd7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by udevd/3936: 2 locks held by getty/4078: #0: ffff0000d69c5098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80002065e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 3 locks held by kworker/1:7/4441: #0: ffff0000d6e19d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020bf7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 3 locks held by kworker/1:18/4452: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020ca7c20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.2.19/4524: 1 lock held by syz.2.19/4525: #0: ffff0000f6414188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000f6414188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000f6414188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 4 locks held by kworker/u4:7/4557: #0: ffff0000c0845138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff8000211f7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017713610 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa74 net/core/net_namespace.c:594 #3: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by syz.0.17/4576: 1 lock held by syz.0.17/4577: #0: ffff0000f64146d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000f64146d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000f64146d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.1.18/4579: 1 lock held by syz.1.18/4580: #0: ffff0000ea068188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ea068188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000ea068188 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.3.20/4582: 1 lock held by syz.3.20/4586: #0: ffff0000ea0686d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ea0686d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000ea0686d0 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.4.21/4584: 1 lock held by syz.4.21/4587: #0: ffff0000f6414c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000f6414c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000f6414c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.5.22/4618: 1 lock held by syz.5.22/4619: #0: ffff0000f6415160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000f6415160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000f6415160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.6.23/4708: 1 lock held by syz.6.23/4709: #0: ffff0000ea068c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ea068c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000ea068c18 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.8.25/4749: 1 lock held by syz.8.25/4750: #0: ffff0000ea069160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ea069160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000ea069160 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz.9.26/4752: 1 lock held by syz.9.26/4757: #0: ffff0000f64156a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000f64156a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000f64156a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 2 locks held by syz.7.24/4754: 1 lock held by syz.7.24/4756: #0: ffff0000ea0696a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ea0696a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff0000ea0696a8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: path_openat+0x5d4/0x2680 fs/namei.c:3780 1 lock held by syz-executor/4964: 1 lock held by syz-executor/9746: #0: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff80001771fc88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6ec/0xce4 net/core/rtnetlink.c:6150 =============================================