INFO: task syz-executor.2:5095 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:19592 pid:5095 tgid:5095 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0x1960/0x4a80 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 rwsem_down_write_slowpath+0xee6/0x13a0 kernel/locking/rwsem.c:1178 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306 __super_lock fs/super.c:56 [inline] __super_lock_excl fs/super.c:71 [inline] deactivate_super+0xad/0xf0 fs/super.c:516 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256 task_work_run+0x24a/0x300 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f842e67de17 RSP: 002b:00007ffd16675308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f842e67de17 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffd166753c0 RBP: 00007ffd166753c0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd16676480 R13: 00007f842e6c73b9 R14: 000000000007905f R15: 0000000000000003 INFO: task syz-executor.0:13778 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24728 pid:13778 tgid:13777 ppid:5082 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0x1960/0x4a80 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 jfs_flush_journal+0x72b/0xec0 fs/jfs/jfs_logmgr.c:1564 jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:684 iterate_supers+0xc2/0x180 fs/super.c:971 ksys_sync+0xdb/0x1c0 fs/sync.c:104 __do_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fbd65a7cae9 RSP: 002b:00007fbd667c20c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007fbd65b9bf80 RCX: 00007fbd65a7cae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fbd65ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fbd65b9bf80 R15: 00007fff254a4a78 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8d92d1e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #0: ffffffff8d92d1e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #0: ffffffff8d92d1e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613 2 locks held by getty/4812: #0: ffff88802a1c20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206 1 lock held by syz-executor.2/5095: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:516 1 lock held by syz-executor.0/13778: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 1 lock held by syz-executor.5/13857: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 1 lock held by syz-executor.1/13861: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 1 lock held by syz-executor.3/13865: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 1 lock held by syz-executor.0/13893: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 1 lock held by syz-executor.0/13919: #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807e7aa0e0 (&type->s_umount_key#110){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfa9/0xff0 kernel/hung_task.c:379 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5932 Comm: kworker/u4:22 Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_wait_context kernel/locking/lockdep.c:4788 [inline] RIP: 0010:__lock_acquire+0x744/0x7f70 kernel/locking/lockdep.c:5086 Code: 85 e3 15 00 00 41 8b 1c 24 41 89 dd ff cb 0f 88 a5 00 00 00 41 89 de 83 fb 31 73 7f 4b 8d 04 b6 48 8b 4c 24 38 4c 8d 74 c1 20 <4c> 89 f0 48 c1 e8 03 42 0f b6 04 00 84 c0 75 1f 45 8b 36 48 8b 44 RSP: 0018:ffffc90015ab7680 EFLAGS: 00000097 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88801cdbe400 RDX: 000000000000000a RSI: 0000000000000008 RDI: ffffffff90dc2438 RBP: ffffc90015ab7948 R08: dffffc0000000000 R09: 1ffffffff21b8487 R10: dffffc0000000000 R11: fffffbfff21b8488 R12: ffff88801cdbe3f8 R13: 0000000000000001 R14: ffff88801cdbe420 R15: ffff88801cdbe470 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000cad2bc CR3: 000000000d730000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] batadv_nc_purge_paths+0xe8/0x3a0 net/batman-adv/network-coding.c:442 batadv_nc_worker+0x365/0x610 net/batman-adv/network-coding.c:722 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242