INFO: task syz.3.306:7972 blocked for more than 143 seconds. Not tainted 6.11.0-rc6-syzkaller-00075-gad618736883b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.306 state:D stack:24864 pid:7972 tgid:7958 ppid:7608 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:726 xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1018 xfs_fs_freeze+0x8d/0x1a0 fs/xfs/xfs_super.c:936 freeze_super+0x81b/0xee0 fs/super.c:2107 fs_bdev_freeze+0x1ac/0x320 fs/super.c:1484 bdev_freeze+0xd6/0x220 block/bdev.c:256 xfs_fs_goingdown+0xa9/0x160 fs/xfs/xfs_fsops.c:446 xfs_file_ioctl+0x12d7/0x19e0 fs/xfs/xfs_ioctl.c:1473 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 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: 0033:0x7f999777cef9 RSP: 002b:00007f9998602038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9997936058 RCX: 00007f999777cef9 RDX: 0000000020000080 RSI: 000000008004587d RDI: 000000000000000a RBP: 00007f99977ef01e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9997936058 R15: 00007ffc7941f5d8 Showing all locks held in the system: 3 locks held by kworker/u8:0/11: 1 lock held by khungtaskd/30: #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626 3 locks held by kworker/u8:2/35: 2 locks held by getty/4977: #0: ffff8880350500a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 4 locks held by kworker/1:6/5299: #0: ffff8880b893e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 #1: ffff8880b8928948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989 #2: ffffffff9a34dac0 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:979 [inline] #2: ffffffff9a34dac0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1020 #3: ffff8880b892a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 5 locks held by syz.3.306/7972: #0: ffff888022c998b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:247 #1: ffff888073d78420 (sb_writers#19){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #1: ffff888073d78420 (sb_writers#19){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085 #2: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #2: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #2: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086 #3: ffff888073d78518 (sb_pagefaults#3){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #3: ffff888073d78518 (sb_pagefaults#3){++++}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090 #4: ffff888073d78610 (sb_internal#2){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #4: ffff888073d78610 (sb_internal#2){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104 1 lock held by syz.1.335/8312: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8319: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8321: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8322: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8323: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8326: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.335/8327: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.378/8694: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.378/8695: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.430/9221: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.433/9239: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor/9404: #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline] #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958 1 lock held by syz.3.506/9728: #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888073d780e0 (&type->s_umount_key#51){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 4 locks held by syz.1.566/10036: #0: ffff8880b893e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 #1: ffff8880b8928948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989 #2: ffff888027dda3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff888027dda3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: write_seqlock include/linux/seqlock.h:822 [inline] #2: ffff888027dda3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: __exit_signal kernel/exit.c:188 [inline] #2: ffff888027dda3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: release_task+0x83a/0x1830 kernel/exit.c:258 #3: ffff888027dda3a0 (&____s->seqcount#4){....}-{0:0}, at: exit_notify kernel/exit.c:776 [inline] #3: ffff888027dda3a0 (&____s->seqcount#4){....}-{0:0}, at: do_exit+0x1b01/0x27f0 kernel/exit.c:902 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-00075-gad618736883b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 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:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 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 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111