INFO: task syz-executor:6552 blocked for more INFO: task syz-executor:6552 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6552 tgid:6552 ppid:1 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 netfs_wait_for_outstanding_io include/linux/netfs.h:552 [inline] v9fs_evict_inode+0x150/0x2d4 fs/9p/vfs_inode.c:348 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 dentry_unlink_inode+0x384/0x45c fs/dcache.c:466 __dentry_kill+0x170/0x594 fs/dcache.c:669 dput+0x1b8/0x290 fs/dcache.c:911 do_one_tree+0xc0/0xf0 fs/dcache.c:1607 shrink_dcache_for_umount+0xa0/0x168 fs/dcache.c:1621 generic_shutdown_super+0x68/0x2b8 fs/super.c:621 kill_anon_super+0x4c/0x7c fs/super.c:1282 v9fs_kill_super+0x4c/0x90 fs/9p/vfs_super.c:195 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xfc/0x168 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline] el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 2 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/32: #0: ffff80008fa49aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: 2 locks held by pr/ttyAMA-1/43: 4 locks held by kworker/u8:4/631: #0: ffff0000c184a948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff80009d0b7be0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff800092b44990 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x6c0 net/core/net_namespace.c:658 #3: ffff80008fa4f440 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x528 kernel/rcu/tree.c:3815 3 locks held by kworker/u8:6/2239: 3 locks held by kworker/u9:1/6135: #0: ffff0000c66e4148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a1347be0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000d11f4dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 2 locks held by getty/6326: #0: ffff0000d38ed0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f5e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6552: #0: ffff0000f3d440e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f3d440e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f3d440e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 3 locks held by kworker/1:8/6752: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a0ad7be0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000cf805240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1cc/0x25b8 drivers/net/netdevsim/fib.c:1490 1 lock held by udevd/9063: #0: ffff0000c15507b8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:885 [inline] #0: ffff0000c15507b8 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:851 2 locks held by kworker/u8:12/14144: 2 locks held by syz.4.2476/14267: 2 locks held by syz.8.2479/14278: 4 locks held by dhcpcd-run-hook/14285: 2 locks held by syz.6.2481/14287: =============================================