INFO: task syz-executor.3:4456 blocked for more than 143 seconds. Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28456 pid: 4456 ppid: 3734 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0xa94/0x4910 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1926 [inline] kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1939 [inline] kvm_vm_ioctl+0x50f/0x22c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4492 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f53ffc95e07 RSP: 002b:00007f53fe5e85d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 00007f53ffc95e07 RDX: 00007f53fe5e8d10 RSI: 000000004020ae46 RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000002 R10: 0000000000000004 R11: 0000000000000246 R12: 00000000fec00000 R13: 00007f53fe5e8d10 R14: 0000000000000005 R15: 0000000020004000 INFO: task syz-executor.3:4461 blocked for more than 143 seconds. Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28952 pid: 4461 ppid: 3734 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0xa94/0x4910 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106 __synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:930 kvm_io_bus_register_dev+0x444/0x6b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5156 kvm_vm_ioctl_register_coalesced_mmio+0x202/0x430 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:156 kvm_vm_ioctl+0xfab/0x22c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4522 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f53ffc96049 RSP: 002b:00007f53fe566168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f53ffda9370 RCX: 00007f53ffc96049 RDX: 00000000200000c0 RSI: 000000004010ae67 RDI: 0000000000000004 RBP: 00007f53ffcf008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f54002dcb1f R14: 00007f53fe566300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bb845e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 2 locks held by getty/3276: #0: ffff88802322c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075 2 locks held by kworker/0:6/3667: 4 locks held by kworker/u4:11/30631: 1 lock held by kworker/0:3/1717: 1 lock held by syz-executor.3/4456: #0: ffffc9000c1c90a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1926 [inline] #0: ffffc9000c1c90a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1939 [inline] #0: ffffc9000c1c90a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl+0x50f/0x22c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4492 1 lock held by syz-executor.3/4461: #0: ffffc9000c1c90a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_register_coalesced_mmio+0x15f/0x430 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:155 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 30687 Comm: kworker/u4:31 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:mark_lock.part.0+0x2a/0x1910 kernel/locking/lockdep.c:4564 Code: 41 57 41 56 41 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 49 89 f4 55 53 48 81 ec 38 01 00 00 48 8d 5c 24 38 48 89 3c 24 <48> c7 44 24 38 b3 8a b5 41 48 c1 eb 03 48 c7 44 24 40 28 c6 39 8b RSP: 0018:ffffc9000b7ff818 EFLAGS: 00000096 RAX: 0000000000000004 RBX: ffffc9000b7ff850 RCX: 1ffffffff1ff9a4e RDX: dffffc0000000000 RSI: ffff888076432788 RDI: ffff888076431d00 RBP: 0000000000000006 R08: 0000000000000000 R09: ffffffff8ffc4957 R10: 0000000000000001 R11: 000000000000003f R12: ffff888076432788 R13: 0000000000000006 R14: ffff888076432760 R15: ffffffff8bcb44e0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0076b47c8 CR3: 000000000b88e000 CR4: 00000000003526f0 Call Trace: mark_lock kernel/locking/lockdep.c:4569 [inline] mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4206 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4232 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x28b/0x400 kernel/locking/lockdep.c:4244 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __text_poke+0x6e1/0x8c0 arch/x86/kernel/alternative.c:1058 text_poke arch/x86/kernel/alternative.c:1083 [inline] text_poke_bp_batch+0x456/0x6f0 arch/x86/kernel/alternative.c:1364 text_poke_flush arch/x86/kernel/alternative.c:1470 [inline] text_poke_flush arch/x86/kernel/alternative.c:1467 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32f/0x410 kernel/jump_label.c:830 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177 static_key_enable+0x16/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:735 [inline] toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:727 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 41 57 push %r15 2: 41 56 push %r14 4: 41 55 push %r13 6: 41 89 d5 mov %edx,%r13d 9: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 10: fc ff df 13: 41 54 push %r12 15: 49 89 f4 mov %rsi,%r12 18: 55 push %rbp 19: 53 push %rbx 1a: 48 81 ec 38 01 00 00 sub $0x138,%rsp 21: 48 8d 5c 24 38 lea 0x38(%rsp),%rbx 26: 48 89 3c 24 mov %rdi,(%rsp) * 2a: 48 c7 44 24 38 b3 8a movq $0x41b58ab3,0x38(%rsp) <-- trapping instruction 31: b5 41 33: 48 c1 eb 03 shr $0x3,%rbx 37: 48 c7 44 24 40 28 c6 movq $0xffffffff8b39c628,0x40(%rsp) 3e: 39 8b