Warning: Permanently added '10.128.0.95' (ED25519) to the list of known hosts. executing program [ 55.541794][ T4162] 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. [ 55.608169][ T4162] [ 55.610638][ T4162] ============================= [ 55.615559][ T4162] WARNING: suspicious RCU usage [ 55.620429][ T4162] 5.15.178-syzkaller #0 Not tainted [ 55.625799][ T4162] ----------------------------- [ 55.630643][ T4162] include/linux/kvm_host.h:880 suspicious rcu_dereference_check() usage! [ 55.639110][ T4162] [ 55.639110][ T4162] other info that might help us debug this: [ 55.639110][ T4162] [ 55.649409][ T4162] [ 55.649409][ T4162] rcu_scheduler_active = 2, debug_locks = 1 [ 55.657502][ T4162] 1 lock held by syz-executor411/4162: [ 55.663015][ T4162] #0: ffff8880795c40c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x1d4/0xcf0 [ 55.672384][ T4162] [ 55.672384][ T4162] stack backtrace: [ 55.678273][ T4162] CPU: 1 PID: 4162 Comm: syz-executor411 Not tainted 5.15.178-syzkaller #0 [ 55.686857][ T4162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 55.696895][ T4162] Call Trace: [ 55.700154][ T4162] [ 55.703068][ T4162] dump_stack_lvl+0x1e3/0x2d0 [ 55.707741][ T4162] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 55.713364][ T4162] ? lockdep_rcu_suspicious+0x158/0x1c0 [ 55.718913][ T4162] kvm_vcpu_memslots+0x1b7/0x200 [ 55.723841][ T4162] kvm_vcpu_gfn_to_memslot+0x2b/0x390 [ 55.729204][ T4162] ? sync_vmcs02_to_vmcs12+0xdca/0x19c0 [ 55.734733][ T4162] kvm_vcpu_unmap+0x5d/0x80 [ 55.739220][ T4162] nested_vmx_vmexit+0x1476/0x2b70 [ 55.744327][ T4162] ? nested_mark_vmcs12_pages_dirty+0x290/0x290 [ 55.750559][ T4162] ? __lock_acquire+0x1ff0/0x1ff0 [ 55.755576][ T4162] ? kvm_arch_vcpu_load+0x58d/0x780 [ 55.760766][ T4162] vmx_leave_nested+0x7d/0xb0 [ 55.765526][ T4162] kvm_vcpu_ioctl_x86_set_vcpu_events+0x8d8/0x10e0 [ 55.772021][ T4162] kvm_arch_vcpu_ioctl+0x120e/0x1d40 [ 55.777309][ T4162] ? kvm_arch_vcpu_put+0x870/0x870 [ 55.782405][ T4162] ? unwind_get_return_address+0x49/0x80 [ 55.788045][ T4162] ? reacquire_held_locks+0x660/0x660 [ 55.793547][ T4162] ? stack_trace_save+0x113/0x1c0 [ 55.798573][ T4162] ? stack_trace_snprint+0xe0/0xe0 [ 55.803684][ T4162] ? kfree+0xf1/0x270 [ 55.807749][ T4162] ? kasan_set_track+0x62/0x80 [ 55.812501][ T4162] ? kasan_set_track+0x4b/0x80 [ 55.817249][ T4162] ? kasan_set_free_info+0x1f/0x40 [ 55.822347][ T4162] ? ____kasan_slab_free+0xd8/0x120 [ 55.827542][ T4162] ? slab_free_freelist_hook+0xdd/0x160 [ 55.833077][ T4162] ? mark_lock+0x98/0x340 [ 55.837432][ T4162] ? read_lock_is_recursive+0x10/0x10 [ 55.842789][ T4162] ? __mutex_trylock_common+0x17e/0x2e0 [ 55.848319][ T4162] ? __might_sleep+0xc0/0xc0 [ 55.852920][ T4162] ? rcu_lock_release+0x20/0x20 [ 55.857773][ T4162] ? __lock_acquire+0x1ff0/0x1ff0 [ 55.862789][ T4162] ? slab_free_freelist_hook+0xdd/0x160 [ 55.868327][ T4162] ? __mutex_lock_common+0x444/0x25a0 [ 55.873685][ T4162] ? tomoyo_path_number_perm+0x6ab/0x810 [ 55.879304][ T4162] ? kvm_vcpu_ioctl+0x1d4/0xcf0 [ 55.884145][ T4162] ? mutex_lock_io_nested+0x60/0x60 [ 55.889365][ T4162] kvm_vcpu_ioctl+0x6db/0xcf0 [ 55.894029][ T4162] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 55.899653][ T4162] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 55.905616][ T4162] ? print_irqtrace_events+0x210/0x210 [ 55.911054][ T4162] ? vtime_user_exit+0x2d1/0x400 [ 55.915992][ T4162] ? bpf_lsm_file_ioctl+0x5/0x10 [ 55.920911][ T4162] ? security_file_ioctl+0x7d/0xa0 [ 55.926006][ T4162] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 55.931655][ T4162] __se_sys_ioctl+0xf1/0x160 [ 55.936232][ T4162] do_syscall_64+0x3b/0xb0 [ 55.940719][ T4162] ? clear_bhb_loop+0x15/0x70 [ 55.945374][ T4162] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 55.951249][ T4162] RIP: 0033:0x7fa67ec32639 [ 55.955648][ T4162] 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 [ 55.975233][ T4162] RSP: 002b:00007ffd7bcbc788 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 55.983652][ T4162] RAX: ffffffffffffffda RBX: 0000400000000000 RCX: 00007fa67ec32639 [ 55.991608][ T4162] RDX: 0000400000000280 RSI: 000000004040aea0 RDI: 0000000000000005 [ 55.999562][ T4162] RBP: 00007fa67eca5610 R08: 00007ffd7bcbc958 R09: 00007ffd7bcbc958 [ 56.007519][ T4162] R10: