Warning: Permanently added '10.128.0.66' (ED25519) to the list of known hosts. executing program syzkaller login: [ 42.193151][ T3505] 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. [ 42.218067][ T3505] [ 42.220565][ T3505] ============================= [ 42.225420][ T3505] WARNING: suspicious RCU usage [ 42.230652][ T3505] 5.15.163-syzkaller #0 Not tainted [ 42.235844][ T3505] ----------------------------- [ 42.240860][ T3505] include/linux/kvm_host.h:880 suspicious rcu_dereference_check() usage! [ 42.249262][ T3505] [ 42.249262][ T3505] other info that might help us debug this: [ 42.249262][ T3505] [ 42.259532][ T3505] [ 42.259532][ T3505] rcu_scheduler_active = 2, debug_locks = 1 [ 42.267672][ T3505] 1 lock held by syz-executor894/3505: [ 42.273145][ T3505] #0: ffff888078d6c0c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x1d4/0xcf0 [ 42.282535][ T3505] [ 42.282535][ T3505] stack backtrace: [ 42.288424][ T3505] CPU: 1 PID: 3505 Comm: syz-executor894 Not tainted 5.15.163-syzkaller #0 [ 42.296983][ T3505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 42.307027][ T3505] Call Trace: [ 42.310287][ T3505] [ 42.313210][ T3505] dump_stack_lvl+0x1e3/0x2d0 [ 42.317999][ T3505] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 42.323734][ T3505] ? lockdep_rcu_suspicious+0x158/0x1c0 [ 42.329269][ T3505] kvm_vcpu_memslots+0x1b7/0x200 [ 42.334200][ T3505] kvm_vcpu_gfn_to_memslot+0x2b/0x390 [ 42.339557][ T3505] ? free_nested+0x437/0x7f0 [ 42.344129][ T3505] kvm_vcpu_unmap+0x5d/0x80 [ 42.348621][ T3505] free_nested+0x4c9/0x7f0 [ 42.353099][ T3505] ? kvm_arch_vcpu_load+0x58d/0x780 [ 42.358274][ T3505] ? trace_kvm_nested_vmenter_failed+0x1e0/0x1e0 [ 42.364577][ T3505] ? vmx_set_nmi_mask+0x154/0x270 [ 42.369580][ T3505] kvm_vcpu_ioctl_x86_set_vcpu_events+0x8d8/0x10e0 [ 42.376061][ T3505] kvm_arch_vcpu_ioctl+0x120e/0x1d40 [ 42.381324][ T3505] ? kvm_arch_vcpu_put+0x870/0x870 [ 42.386407][ T3505] ? unwind_get_return_address+0x49/0x80 [ 42.392020][ T3505] ? reacquire_held_locks+0x660/0x660 [ 42.397376][ T3505] ? stack_trace_save+0x113/0x1c0 [ 42.402462][ T3505] ? stack_trace_snprint+0xe0/0xe0 [ 42.407553][ T3505] ? kfree+0xf1/0x270 [ 42.411512][ T3505] ? kasan_set_track+0x62/0x80 [ 42.416249][ T3505] ? kasan_set_track+0x4b/0x80 [ 42.420983][ T3505] ? kasan_set_free_info+0x1f/0x40 [ 42.426067][ T3505] ? ____kasan_slab_free+0xd8/0x120 [ 42.431239][ T3505] ? slab_free_freelist_hook+0xdd/0x160 [ 42.436758][ T3505] ? mark_lock+0x98/0x340 [ 42.441076][ T3505] ? read_lock_is_recursive+0x10/0x10 [ 42.446452][ T3505] ? __mutex_trylock_common+0x17e/0x2e0 [ 42.451972][ T3505] ? __might_sleep+0xc0/0xc0 [ 42.456540][ T3505] ? rcu_lock_release+0x20/0x20 [ 42.461365][ T3505] ? __lock_acquire+0x1ff0/0x1ff0 [ 42.466364][ T3505] ? slab_free_freelist_hook+0xdd/0x160 [ 42.471887][ T3505] ? __mutex_lock_common+0x444/0x25a0 [ 42.477238][ T3505] ? tomoyo_path_number_perm+0x6ab/0x810 [ 42.482846][ T3505] ? kvm_vcpu_ioctl+0x1d4/0xcf0 [ 42.487678][ T3505] ? mutex_lock_io_nested+0x60/0x60 [ 42.492860][ T3505] kvm_vcpu_ioctl+0x6db/0xcf0 [ 42.497515][ T3505] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 42.503126][ T3505] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 42.509085][ T3505] ? print_irqtrace_events+0x210/0x210 [ 42.514522][ T3505] ? vtime_user_exit+0x2d1/0x400 [ 42.519438][ T3505] ? bpf_lsm_file_ioctl+0x5/0x10 [ 42.524348][ T3505] ? security_file_ioctl+0x7d/0xa0 [ 42.529433][ T3505] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 42.535040][ T3505] __se_sys_ioctl+0xf1/0x160 [ 42.539612][ T3505] do_syscall_64+0x3b/0xb0 [ 42.544006][ T3505] ? clear_bhb_loop+0x15/0x70 [ 42.548664][ T3505] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 42.554534][ T3505] RIP: 0033:0x7fc3846080f9 [ 42.558925][ T3505] 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 [ 42.578504][ T3505] RSP: 002b:00007ffffb3164f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 42.586897][ T3505] RAX: ffffffffffffffda RBX: 00007ffffb3166c8 RCX: 00007fc3846080f9