INFO: task syz-executor.4:5068 blocked for more than 143 seconds. Not tainted 6.5.0-syzkaller-12107-g7ba2090ca64e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:21352 pid:5068 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1873/0x48f0 kernel/sched/core.c:6695 schedule+0xc3/0x180 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 rwsem_down_write_slowpath+0xedd/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:513 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 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+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7faa3f87de17 RSP: 002b:00007fff1d586798 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faa3f87de17 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff1d586850 RBP: 00007fff1d586850 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff1d587910 R13: 00007faa3f8c73b9 R14: 00000000001aa5b8 R15: 000000000000000c INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.5.0-syzkaller-12107-g7ba2090ca64e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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+0xdf5/0xe40 kernel/hung_task.c:379 kthread+0x2b8/0x350 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:304 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3791 Comm: kworker/u4:9 Not tainted 6.5.0-syzkaller-12107-g7ba2090ca64e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: 0x0 (loop4) RIP: 0010:cfs_rq_clock_pelt kernel/sched/pelt.h:174 [inline] RIP: 0010:update_load_avg+0x138/0x14b0 kernel/sched/fair.c:4468 Code: 00 00 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8 6a be 83 00 48 8b 6d 00 49 8d 9d c0 01 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 49 be 83 00 48 03 2b 49 29 ee 4c RSP: 0018:ffffc9000d3dfa40 EFLAGS: 00000802 RAX: 1ffff110173278b0 RBX: ffff8880b993c580 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffff88807c2e8800 RDI: ffff8880b993cd88 RBP: 0000000000000000 R08: ffffffff8e9a5f6f R09: 1ffffffff1d34bed R10: dffffc0000000000 R11: fffffbfff1d34bee R12: dffffc0000000000 R13: ffff8880b993c3c0 R14: 000001a5436577ef R15: ffff88807c2e8800 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0009bed34 CR3: 000000002117c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: set_next_entity+0x10e/0x4c0 kernel/sched/fair.c:5177 pick_next_task_fair+0x36e/0xdc0 kernel/sched/fair.c:8195 __pick_next_task kernel/sched/core.c:6004 [inline] pick_next_task kernel/sched/core.c:6079 [inline] __schedule+0x7c6/0x48f0 kernel/sched/core.c:6659 schedule+0xc3/0x180 kernel/sched/core.c:6771 worker_thread+0xcad/0x1060 kernel/workqueue.c:2799 kthread+0x2b8/0x350 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:304