INFO: task syz-executor.1:6406 blocked for more than 143 seconds. Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24304 pid:6406 tgid:6406 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 lmLogClose+0xc8/0x710 fs/jfs/jfs_logmgr.c:1444 jfs_umount+0x2f0/0x440 fs/jfs/jfs_umount.c:114 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2955a7e1d7 RSP: 002b:00007fffaae6ca08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f2955a7e1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffaae6cac0 RBP: 00007fffaae6cac0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffaae6db70 R13: 00007f2955ad9636 R14: 0000000000031fe8 R15: 0000000000000005 Showing all locks held in the system: 5 locks held by kworker/u8:0/11: #0: ffff8880162d3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc90000107d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f736c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594 #3: ffffffff8f74bea8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8c/0xae0 net/core/dev.c:11746 #4: ffffffff8dbbd0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:291 1 lock held by khungtaskd/30: #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/1:2/934: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000440fd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffff888011f23240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26e0 drivers/net/netdevsim/fib.c:1489 2 locks held by kworker/u8:9/2489: 2 locks held by getty/4849: #0: ffff88802e8900a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/5089: 2 locks held by syz-executor.4/5106: #0: ffff88806932e0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88806932e0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88806932e0e0 (&type->s_umount_key#95){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505 #1: ffffffff8e16d248 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xc8/0x710 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz-executor.0/6180: #0: ffff88806932e0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88806932e0e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x31a/0x3f0 fs/super.c:120 2 locks held by syz-executor.1/6406: #0: ffff88805d71a0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88805d71a0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88805d71a0e0 (&type->s_umount_key#95){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505 #1: ffffffff8e16d248 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xc8/0x710 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor.2/7210: #0: ffff88802c8e60e0 (&type->s_umount_key#94/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:344 #1: ffffffff8e16d248 (jfs_log_mutex){+.+.}-{3:3}, at: open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline] #1: ffffffff8e16d248 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogOpen+0x972/0x1400 fs/jfs/jfs_logmgr.c:1066 2 locks held by syz-executor.3/7350: #0: ffff88805657c0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88805657c0e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88805657c0e0 (&type->s_umount_key#95){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505 #1: ffffffff8e16d248 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xc8/0x710 fs/jfs/jfs_logmgr.c:1444 7 locks held by syz-executor.0/7686: