Warning: Permanently added '10.128.1.91' (ED25519) to the list of known hosts. executing program [ 60.890861][ T4161] 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. [ 60.966798][ T4161] [ 60.969355][ T4161] ============================= [ 60.974278][ T4161] WARNING: suspicious RCU usage [ 60.979188][ T4161] 5.15.170-syzkaller #0 Not tainted [ 60.984459][ T4161] ----------------------------- [ 60.989326][ T4161] include/linux/kvm_host.h:880 suspicious rcu_dereference_check() usage! [ 60.997876][ T4161] [ 60.997876][ T4161] other info that might help us debug this: [ 60.997876][ T4161] [ 61.008137][ T4161] [ 61.008137][ T4161] rcu_scheduler_active = 2, debug_locks = 1 [ 61.016258][ T4161] 1 lock held by syz-executor250/4161: [ 61.021748][ T4161] #0: ffff88806fcb40c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0x1d4/0xcf0 [ 61.031151][ T4161] [ 61.031151][ T4161] stack backtrace: [ 61.037052][ T4161] CPU: 0 PID: 4161 Comm: syz-executor250 Not tainted 5.15.170-syzkaller #0 [ 61.045629][ T4161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 61.055678][ T4161] Call Trace: [ 61.058944][ T4161] [ 61.061862][ T4161] dump_stack_lvl+0x1e3/0x2d0 [ 61.066548][ T4161] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 61.072175][ T4161] ? lockdep_rcu_suspicious+0x158/0x1c0 [ 61.077733][ T4161] kvm_vcpu_memslots+0x1b7/0x200 [ 61.082664][ T4161] kvm_vcpu_gfn_to_memslot+0x2b/0x390 [ 61.088024][ T4161] ? sync_vmcs02_to_vmcs12+0xdca/0x19c0 [ 61.093663][ T4161] kvm_vcpu_unmap+0x5d/0x80 [ 61.098159][ T4161] nested_vmx_vmexit+0x1476/0x2b70 [ 61.103274][ T4161] ? nested_mark_vmcs12_pages_dirty+0x290/0x290 [ 61.109517][ T4161] ? __lock_acquire+0x1ff0/0x1ff0 [ 61.114543][ T4161] ? kvm_arch_vcpu_load+0x58d/0x780 [ 61.119738][ T4161] vmx_leave_nested+0x7d/0xb0 [ 61.124404][ T4161] kvm_vcpu_ioctl_x86_set_vcpu_events+0x8d8/0x10e0 [ 61.130905][ T4161] kvm_arch_vcpu_ioctl+0x120e/0x1d40 [ 61.136205][ T4161] ? kvm_arch_vcpu_put+0x870/0x870 [ 61.141309][ T4161] ? unwind_get_return_address+0x49/0x80 [ 61.146956][ T4161] ? reacquire_held_locks+0x660/0x660 [ 61.152315][ T4161] ? stack_trace_save+0x113/0x1c0 [ 61.157329][ T4161] ? stack_trace_snprint+0xe0/0xe0 [ 61.162455][ T4161] ? kfree+0xf1/0x270 [ 61.166428][ T4161] ? kasan_set_track+0x62/0x80 [ 61.171179][ T4161] ? kasan_set_track+0x4b/0x80 [ 61.175925][ T4161] ? kasan_set_free_info+0x1f/0x40 [ 61.181022][ T4161] ? ____kasan_slab_free+0xd8/0x120 [ 61.186202][ T4161] ? slab_free_freelist_hook+0xdd/0x160 [ 61.191753][ T4161] ? mark_lock+0x98/0x340 [ 61.196090][ T4161] ? read_lock_is_recursive+0x10/0x10 [ 61.201467][ T4161] ? __mutex_trylock_common+0x17e/0x2e0 [ 61.207004][ T4161] ? __might_sleep+0xc0/0xc0 [ 61.211582][ T4161] ? rcu_lock_release+0x20/0x20 [ 61.216421][ T4161] ? __lock_acquire+0x1ff0/0x1ff0 [ 61.221453][ T4161] ? slab_free_freelist_hook+0xdd/0x160 [ 61.226989][ T4161] ? __mutex_lock_common+0x444/0x25a0 [ 61.232356][ T4161] ? tomoyo_path_number_perm+0x6ab/0x810 [ 61.238077][ T4161] ? kvm_vcpu_ioctl+0x1d4/0xcf0 [ 61.242937][ T4161] ? mutex_lock_io_nested+0x60/0x60 [ 61.248133][ T4161] kvm_vcpu_ioctl+0x6db/0xcf0 [ 61.252803][ T4161] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 61.258430][ T4161] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 61.264411][ T4161] ? print_irqtrace_events+0x210/0x210 [ 61.269855][ T4161] ? vtime_user_exit+0x2d1/0x400 [ 61.274792][ T4161] ? bpf_lsm_file_ioctl+0x5/0x10 [ 61.279716][ T4161] ? security_file_ioctl+0x7d/0xa0 [ 61.284818][ T4161] ? kvm_clear_stat_per_vcpu+0x1e0/0x1e0 [ 61.290439][ T4161] __se_sys_ioctl+0xf1/0x160 [ 61.295016][ T4161] do_syscall_64+0x3b/0xb0 [ 61.299418][ T4161] ? clear_bhb_loop+0x15/0x70 [ 61.304084][ T4161] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 61.309969][ T4161] RIP: 0033:0x7fcc815ff5f9 [ 61.314377][ T4161] 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 [ 61.334138][ T4161] RSP: 002b:00007ffcbc2905e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 61.342537][ T4161] RAX: ffffffffffffffda RBX: 00007ffcbc2907b8 RCX: 00007fcc815ff5f9 [ 61.350494][ T4161] RDX: 0000000020000180 RSI: 000000004040aea0 RDI: 0000000000000005 [ 61.358451][ T4161] RBP: 00007fcc81672610 R08: 00007ffcbc2907b8 R09: 00007ffcbc2907b8 [ 61.366414][ T4161] R10: