Warning: Permanently added '10.128.1.163' (ED25519) to the list of known hosts. executing program [ 42.792985][ T3488] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 42.818113][ T3488] [ 42.820558][ T3488] ============================= [ 42.825716][ T3488] WARNING: suspicious RCU usage [ 42.830546][ T3488] 5.15.128-syzkaller #0 Not tainted [ 42.836163][ T3488] ----------------------------- [ 42.840995][ T3488] include/linux/kvm_host.h:880 suspicious rcu_dereference_check() usage! [ 42.850104][ T3488] [ 42.850104][ T3488] other info that might help us debug this: [ 42.850104][ T3488] [ 42.860632][ T3488] [ 42.860632][ T3488] rcu_scheduler_active = 2, debug_locks = 1 [ 42.868926][ T3488] 1 lock held by syz-executor197/3488: [ 42.874567][ T3488] #0: ffff88807ac640c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x1d4/0xcf0 [ 42.884257][ T3488] [ 42.884257][ T3488] stack backtrace: [ 42.890130][ T3488] CPU: 1 PID: 3488 Comm: syz-executor197 Not tainted 5.15.128-syzkaller #0 [ 42.898688][ T3488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 42.908719][ T3488] Call Trace: [ 42.911978][ T3488] [ 42.915013][ T3488] dump_stack_lvl+0x1e3/0x2cb [ 42.919692][ T3488] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 42.925310][ T3488] ? lockdep_rcu_suspicious+0x158/0x1c0 [ 42.930844][ T3488] kvm_vcpu_memslots+0x1b7/0x200 [ 42.935764][ T3488] kvm_vcpu_gfn_to_memslot+0x2b/0x390 [ 42.941119][ T3488] ? free_nested+0x437/0x7f0 [ 42.945697][ T3488] kvm_vcpu_unmap+0x5d/0x80 [ 42.950178][ T3488] free_nested+0x4c9/0x7f0 [ 42.954571][ T3488] ? kvm_arch_vcpu_load+0x58d/0x780 [ 42.959745][ T3488] ? trace_kvm_nested_vmenter_failed+0x1e0/0x1e0 [ 42.966049][ T3488] ? vmx_set_nmi_mask+0x154/0x270 [ 42.971052][ T3488] kvm_vcpu_ioctl_x86_set_vcpu_events+0x8d8/0x10e0 [ 42.977531][ T3488] kvm_arch_vcpu_ioctl+0x120e/0x1d40 [ 42.982796][ T3488] ? kvm_arch_vcpu_put+0x870/0x870 [ 42.987892][ T3488] ? reacquire_held_locks+0x660/0x660 [ 42.993239][ T3488] ? stack_trace_save+0x113/0x1c0 [ 42.998238][ T3488] ? stack_trace_snprint+0xe0/0xe0 [ 43.003419][ T3488] ? kfree+0xf1/0x270 [ 43.007374][ T3488] ? kasan_set_track+0x62/0x80 [ 43.012110][ T3488] ? kasan_set_track+0x4b/0x80 [ 43.016845][ T3488] ? kasan_set_free_info+0x1f/0x40 [ 43.021932][ T3488] ? ____kasan_slab_free+0xd8/0x120 [ 43.027103][ T3488] ? slab_free_freelist_hook+0xdd/0x160 [ 43.032628][ T3488] ? mark_lock+0x98/0x340 [ 43.036960][ T3488] ? read_lock_is_recursive+0x10/0x10 [ 43.042309][ T3488] ? __mutex_trylock_common+0x17e/0x2e0 [ 43.047827][ T3488] ? __might_sleep+0xc0/0xc0 [ 43.052392][ T3488] ? rcu_lock_release+0x20/0x20 [ 43.057221][ T3488] ? __lock_acquire+0x1ff0/0x1ff0 [ 43.062222][ T3488] ? slab_free_freelist_hook+0xdd/0x160 [ 43.067757][ T3488] ? __mutex_lock_common+0x444/0x25a0 [ 43.073110][ T3488] ? tomoyo_path_number_perm+0x6ab/0x810 [ 43.078718][ T3488] ? kvm_vcpu_ioctl+0x1d4/0xcf0 [ 43.083543][ T3488] ? mutex_lock_io_nested+0x60/0x60 [ 43.088723][ T3488] kvm_vcpu_ioctl+0x6db/0xcf0 [ 43.093377][ T3488] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 43.098991][ T3488] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 43.104948][ T3488] ? print_irqtrace_events+0x210/0x210 [ 43.110379][ T3488] ? vtime_user_exit+0x2d1/0x400 [ 43.115291][ T3488] ? bpf_lsm_file_ioctl+0x5/0x10 [ 43.120200][ T3488] ? security_file_ioctl+0x7d/0xa0 [ 43.125281][ T3488] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 43.130892][ T3488] __se_sys_ioctl+0xf1/0x160 [ 43.135458][ T3488] do_syscall_64+0x3d/0xb0 [ 43.139851][ T3488] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 43.145726][ T3488] RIP: 0033:0x7f1869a0f0b9 [ 43.150206][ T3488] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 43.169783][ T3488] RSP: 002b:00007ffc492aa558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 43.178171][ T3488] RAX: ffffffffffffffda RBX: 00007ffc492aa728 RCX: 00007f1869a0f0b9 [ 43.186119][ T3488] RDX: 0000000020000080 RSI: 000000004040aea0 RDI: 0000000000000005 [ 43.194067][ T3488] RBP: 00007f1869a84610 R08: 00007ffc492aa728 R09: 00007ffc492aa728 [ 43.202014][ T3488] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 43.209959][ T3488] R13: 00007ffc492aa718 R14: 0000000000000001 R15: 0000000000000001 [ 43.217914][ T3488]