INFO: task syz-executor:6655 blocked for INFO: task syz-executor:6655 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:6655 tgid:6655 ppid:1 task_flags:0x400140 flags:0x00000011 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 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7115 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 jfs_umount+0x26c/0x350 fs/jfs/jfs_umount.c:114 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1766 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: 3 locks held by kworker/u8:1/14: #0: ffff0000d2ca7948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff800097c57be0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by khungtaskd/32: #0: ffff80008f9c9360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA-1/43: 5 locks held by kworker/u8:5/898: #0: ffff0000c18a2948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff80009c4e7be0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff800092a68d10 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x6c0 net/core/net_namespace.c:658 #3: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #4: ffff80008f9ced00 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x528 kernel/rcu/tree.c:3815 3 locks held by kworker/0:3/2321: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a1dc7be0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000cfeb0240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1cc/0x25b8 drivers/net/netdevsim/fib.c:1490 2 locks held by getty/6313: #0: ffff0000d2ceb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b2682f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 3 locks held by kworker/0:5/6640: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a3e17be0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by syz-executor/6647: 2 locks held by syz-executor/6655: #0: ffff0000d447c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d447c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d447c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6802: #0: ffff0000f36ce0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f36ce0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f36ce0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6808: #0: ffff0000f25de0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f25de0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f25de0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6810: #0: ffff0000f243a0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f243a0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f243a0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6811: #0: ffff0000d56860e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d56860e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d56860e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6812: #0: ffff0000f95f80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f95f80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f95f80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6967: #0: ffff0000d3f000e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d3f000e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d3f000e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/6973: #0: ffff00010cc4c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff00010cc4c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff00010cc4c0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fdfff48 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/10127: #0: ffff80008f7e3398 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #1: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff800092a75b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x710/0x15dc net/core/rtnetlink.c:4056 2 locks held by syz.1.2965/10135: 2 locks held by syz.5.2966/10136: 2 locks held by syz.4.2967/10137: =============================================