Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. executing program [ 54.748071][ T3498] 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. [ 54.804905][ T3498] [ 54.807373][ T3498] ============================= [ 54.812859][ T3498] WARNING: suspicious RCU usage [ 54.817714][ T3498] 5.15.112-syzkaller #0 Not tainted [ 54.823032][ T3498] ----------------------------- [ 54.827907][ T3498] include/linux/kvm_host.h:880 suspicious rcu_dereference_check() usage! [ 54.836578][ T3498] [ 54.836578][ T3498] other info that might help us debug this: [ 54.836578][ T3498] [ 54.847256][ T3498] [ 54.847256][ T3498] rcu_scheduler_active = 2, debug_locks = 1 [ 54.855486][ T3498] 1 lock held by syz-executor173/3498: [ 54.860994][ T3498] #0: ffff8880736540c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x1d4/0xcf0 [ 54.871072][ T3498] [ 54.871072][ T3498] stack backtrace: [ 54.877067][ T3498] CPU: 0 PID: 3498 Comm: syz-executor173 Not tainted 5.15.112-syzkaller #0 [ 54.886030][ T3498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 54.896089][ T3498] Call Trace: [ 54.899371][ T3498] [ 54.902294][ T3498] dump_stack_lvl+0x1e3/0x2cb [ 54.906984][ T3498] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 54.912620][ T3498] ? lockdep_rcu_suspicious+0x158/0x1c0 [ 54.918163][ T3498] kvm_vcpu_memslots+0x1b7/0x200 [ 54.923113][ T3498] kvm_vcpu_gfn_to_memslot+0x2b/0x390 [ 54.928919][ T3498] ? sync_vmcs02_to_vmcs12+0xdca/0x19c0 [ 54.934513][ T3498] kvm_vcpu_unmap+0x5d/0x80 [ 54.939014][ T3498] nested_vmx_vmexit+0x1451/0x2b50 [ 54.944135][ T3498] ? nested_mark_vmcs12_pages_dirty+0x290/0x290 [ 54.950376][ T3498] ? __lock_acquire+0x1ff0/0x1ff0 [ 54.955414][ T3498] ? kvm_arch_vcpu_load+0x58d/0x780 [ 54.960641][ T3498] vmx_leave_nested+0x7d/0xb0 [ 54.965327][ T3498] kvm_vcpu_ioctl_x86_set_vcpu_events+0x8d8/0x10e0 [ 54.972976][ T3498] kvm_arch_vcpu_ioctl+0x120e/0x1d40 [ 54.978263][ T3498] ? kvm_arch_vcpu_put+0x870/0x870 [ 54.983404][ T3498] ? reacquire_held_locks+0x660/0x660 [ 54.988785][ T3498] ? stack_trace_save+0x113/0x1c0 [ 54.994001][ T3498] ? stack_trace_snprint+0xe0/0xe0 [ 54.999156][ T3498] ? kfree+0xf1/0x270 [ 55.003174][ T3498] ? kasan_set_track+0x62/0x80 [ 55.007995][ T3498] ? kasan_set_track+0x4b/0x80 [ 55.012773][ T3498] ? kasan_set_free_info+0x1f/0x40 [ 55.017889][ T3498] ? ____kasan_slab_free+0xd8/0x120 [ 55.023225][ T3498] ? slab_free_freelist_hook+0xdd/0x160 [ 55.028804][ T3498] ? mark_lock+0x98/0x340 [ 55.033166][ T3498] ? read_lock_is_recursive+0x10/0x10 [ 55.038540][ T3498] ? __mutex_trylock_common+0x17e/0x2e0 [ 55.044127][ T3498] ? __might_sleep+0xc0/0xc0 [ 55.048732][ T3498] ? rcu_lock_release+0x20/0x20 [ 55.053614][ T3498] ? __lock_acquire+0x1ff0/0x1ff0 [ 55.058643][ T3498] ? slab_free_freelist_hook+0xdd/0x160 [ 55.064236][ T3498] ? __mutex_lock_common+0x444/0x25a0 [ 55.069613][ T3498] ? tomoyo_path_number_perm+0x6ab/0x810 [ 55.075246][ T3498] ? kvm_vcpu_ioctl+0x1d4/0xcf0 [ 55.080098][ T3498] ? mutex_lock_io_nested+0x60/0x60 [ 55.085304][ T3498] kvm_vcpu_ioctl+0x6db/0xcf0 [ 55.089987][ T3498] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 55.096319][ T3498] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 55.102309][ T3498] ? print_irqtrace_events+0x210/0x210 [ 55.107914][ T3498] ? vtime_user_exit+0x2d1/0x400 [ 55.112869][ T3498] ? bpf_lsm_file_ioctl+0x5/0x10 [ 55.117835][ T3498] ? security_file_ioctl+0x7d/0xa0 [ 55.122952][ T3498] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 55.128604][ T3498] __se_sys_ioctl+0xf1/0x160 [ 55.133208][ T3498] do_syscall_64+0x3d/0xb0 [ 55.137629][ T3498] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 55.143519][ T3498] RIP: 0033:0x7fd786045ed9 [ 55.147932][ T3498] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 55.167642][ T3498] RSP: 002b:00007ffe880d8068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 55.176106][ T3498] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd786045ed9 [ 55.184081][ T3498] RDX: 00000000200000c0 RSI: 000000004040aea0 RDI: 0000000000000005 [ 55.192061][ T3498] RBP: 00007fd7860099d0 R08: 0000000000000000 R09: 0000000000000000 [ 55.200030][ T3498] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd786009a60 [ 55.207996][ T3498] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 55.215972][ T3498]