INFO: task syz-executor:6640 blocked for more than 143 seconds. Not tainted 6.13.0-rc7-syzkaller-00191-gfda5e3f28400 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:13912 pid:6640 tgid:6640 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735 lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 jfs_umount+0x2ce/0x3a0 fs/jfs/jfs_umount.c:114 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2a/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9e0f785d29 RSP: 002b:00007ffee5a098f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f9e0f801954 RCX: 00007f9e0f785d29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000005 R08: 00007ffee5a07697 R09: 00007ffee5a0abb0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee5a0abb0 R13: 00007f9e0f8018f4 R14: 000055556321a4a8 R15: 0000000000000034 Showing all locks held in the system: 1 lock held by ksoftirqd/1/24: 1 lock held by khungtaskd/30: #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by kworker/1:2/119: #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317 #1: ffffc90002e07d00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90002e07d00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317 2 locks held by getty/5569: #0: ffff8880317830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:5/5823: #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317 #1: ffffc9000413fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000413fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317 #2: ffff888053aad240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1490 2 locks held by syz-executor/6640: #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/7745: #0: ffff88805f1680e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff88805f1680e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88805f1680e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/8698: #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/8753: #0: ffff88805ad840e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff88805ad840e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88805ad840e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/8901: #0: ffff8880538de0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880538de0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880538de0e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/9468: #0: ffff888033f320e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888033f320e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888033f320e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz.5.452/10506: #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.5.452/10521: #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 2 locks held by syz-executor/10763: #0: ffff888041b360e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888041b360e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888041b360e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/10977: #0: ffff88802a1040e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff88802a1040e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88802a1040e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/10979: #0: ffff888040d4a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888040d4a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888040d4a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8ed55308 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz.1.488/11042: #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.492/11279: #0: ffff88805ad840e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88805ad840e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.5.534/11870: #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888011d480e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by dhcpcd/11951: #0: ffff888054eb6808 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff888054eb6808 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: __sock_release net/socket.c:639 [inline] #0: ffff888054eb6808 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1408 1 lock held by dhcpcd/12026: #0: ffff8880603c8e08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff8880603c8e08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: __sock_release net/socket.c:639 [inline] #0: ffff8880603c8e08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1408 1 lock held by syz.2.563/12074: #0: ffff8880538de0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880538de0e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x196/0x400 fs/super.c:120 1 lock held by syz.9.574/12099: #0: ffff888033f320e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff888033f320e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.591/12233: #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff888060a4e0e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x196/0x400 fs/super.c:120 3 locks held by syz-executor/12269: #0: ffff888062f60d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline] #0: ffff888062f60d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2697 #1: ffff888062f60078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5201 #2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #2: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 1 lock held by syz.4.606/12388: #0: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 2 locks held by dhcpcd-run-hook/12443: #0: ffff8880b863e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 #1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller-00191-gfda5e3f28400 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.13.0-rc7-syzkaller-00191-gfda5e3f28400 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:skb_reset_mac_header include/linux/skbuff.h:3074 [inline] RIP: 0010:nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:753 [inline] RIP: 0010:nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] RIP: 0010:nsim_dev_trap_report_work+0x280/0xb50 drivers/net/netdevsim/dev.c:851 Code: d2 b9 ff ff ff ff e8 ff 11 61 02 48 85 c0 0f 84 d8 04 00 00 49 89 c4 48 8d 98 d8 00 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 40 <42> 80 3c 30 00 74 08 48 89 df e8 01 b9 df fa 48 89 5c 24 50 49 8b RSP: 0018:ffffc90000ab7ae8 EFLAGS: 00000a06 RAX: 1ffff1100c08cabb RBX: ffff8880604655d8 RCX: ffff888020a90000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888071230ee0 RBP: 0000000000000068 R08: ffff888071230ee3 R09: 1ffff1100e2461dc R10: dffffc0000000000 R11: ffffed100e2461dd R12: ffff888060465500 R13: ffff888026fca8a8 R14: dffffc0000000000 R15: ffff888069de55c8 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055931a9eb680 CR3: 0000000032ef2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244