INFO: task syz.3.4:6483 blocked for more than 143 seconds. Not tainted 6.11.0-rc5-syzkaller-gdf54f4a16f82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4 state:D stack:0 pid:6483 tgid:6479 ppid:6397 flags:0x00000005 Call trace: __switch_to+0x418/0x658 arch/arm64/kernel/process.c:579 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 __fdget_pos+0x218/0x2a4 fs/file.c:1187 fdget_pos include/linux/file.h:76 [inline] ksys_read+0x8c/0x26c fs/read_write.c:610 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:627 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz.3.4:6485 blocked for more than 143 seconds. Not tainted 6.11.0-rc5-syzkaller-gdf54f4a16f82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4 state:D stack:0 pid:6485 tgid:6479 ppid:6397 flags:0x00000001 Call trace: __switch_to+0x418/0x658 arch/arm64/kernel/process.c:579 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 d_wait_lookup+0x1a0/0x27c fs/dcache.c:2458 d_alloc_parallel+0x9c4/0x1184 fs/dcache.c:2540 __lookup_slow+0x108/0x374 fs/namei.c:1703 lookup_slow+0x60/0x84 fs/namei.c:1735 walk_component+0x280/0x36c fs/namei.c:2039 lookup_last fs/namei.c:2542 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2566 filename_lookup+0x1d4/0x4e0 fs/namei.c:2595 user_path_at+0x50/0x74 fs/namei.c:3002 __do_sys_chdir fs/open.c:562 [inline] __se_sys_chdir fs/open.c:556 [inline] __arm64_sys_chdir+0xbc/0x2c8 fs/open.c:556 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 4 locks held by kworker/u8:0/11: #0: ffff0000c1869948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff800094417c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff8000923aa750 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0x9b4 net/core/net_namespace.c:594 #3: ffff0000ec79d428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x11c/0x2c0 drivers/net/wireguard/device.c:249 1 lock held by khungtaskd/31: #0: ffff80008f6edba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325 2 locks held by kworker/u8:9/2122: #0: ffff0000c329f948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009cd57c20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 3 locks held by kworker/1:2/2242: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009cf87c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000ee55b240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489 2 locks held by getty/6156: #0: ffff0000d292a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009836e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/6384: 2 locks held by syz.3.4/6480: 1 lock held by syz.3.4/6483: #0: ffff0000c938c5c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187 1 lock held by syz.3.4/6484: 1 lock held by syz.3.4/6485: #0: ffff0000deae8180 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:809 [inline] #0: ffff0000deae8180 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1734 3 locks held by syz.0.558/9345: =============================================