Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.226117] 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. [ 37.244751] FAULT_INJECTION: forcing a failure. [ 37.244751] name failslab, interval 1, probability 0, space 0, times 1 [ 37.256260] CPU: 0 PID: 7971 Comm: syz-executor179 Not tainted 4.14.295-syzkaller #0 [ 37.264132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 37.273551] Call Trace: [ 37.276118] dump_stack+0x1b2/0x281 [ 37.279748] should_fail.cold+0x10a/0x149 [ 37.283941] should_failslab+0xd6/0x130 [ 37.287903] __kmalloc+0x2c1/0x400 [ 37.291427] ? kvm_io_bus_unregister_dev+0x116/0x320 [ 37.296511] kvm_io_bus_unregister_dev+0x116/0x320 [ 37.301418] ? lock_downgrade+0x740/0x740 [ 37.305572] kvm_vm_ioctl_unregister_coalesced_mmio+0x17d/0x280 [ 37.311630] kvm_vm_ioctl+0x77d/0x1420 [ 37.315761] ? kvm_vcpu_release+0xa0/0xa0 [ 37.319895] ? get_pid_task+0xb8/0x130 [ 37.323779] ? proc_fail_nth_write+0x7b/0x180 [ 37.328271] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.333189] ? fsnotify+0x974/0x11b0 [ 37.336899] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.341811] ? debug_check_no_obj_freed+0x2c0/0x680 [ 37.346813] ? kvm_vcpu_release+0xa0/0xa0 [ 37.350955] do_vfs_ioctl+0x75a/0xff0 [ 37.354827] ? ioctl_preallocate+0x1a0/0x1a0 [ 37.359298] ? vfs_write+0x319/0x4d0 [ 37.362991] ? SyS_write+0x14d/0x210 [ 37.366698] ? security_file_ioctl+0x83/0xb0 [ 37.371086] SyS_ioctl+0x7f/0xb0 [ 37.374451] ? do_vfs_ioctl+0xff0/0xff0 [ 37.378426] do_syscall_64+0x1d5/0x640 [ 37.382299] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.387469] RIP: 0033:0x7fae72096759 [ 37.391243] RSP: 002b:00007ffc2483e9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 37.398939] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fae72096759 [ 37.406453] RDX: 00000000200000c0 RSI: 000000004010ae68 RDI: 0000000000000004 [ 37.413767] RBP: 00007ffc2483e9b0 R08: 0000000000000001 R09: 00007fae72050031 [ 37.421043] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 [ 37.428382] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.436585] kvm: failed to shrink bus, removing it completely [ 37.442919] ================================================================== [ 37.451760] BUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.460322] Read of size 8 at addr ffff8880a9277200 by task syz-executor179/7971 [ 37.467830] [ 37.469870] CPU: 0 PID: 7971 Comm: syz-executor179 Not tainted 4.14.295-syzkaller #0 [ 37.478100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 37.487448] Call Trace: [ 37.490030] dump_stack+0x1b2/0x281 [ 37.493639] print_address_description.cold+0x54/0x1d3 [ 37.498895] kasan_report_error.cold+0x8a/0x191 [ 37.503542] ? kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.509792] __asan_report_load8_noabort+0x68/0x70 [ 37.514705] ? kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.520911] ? kvm_vm_create_worker_thread+0x200/0x200 [ 37.526161] kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.532196] kvm_vm_ioctl+0x77d/0x1420 [ 37.536081] ? kvm_vcpu_release+0xa0/0xa0 [ 37.540221] ? get_pid_task+0xb8/0x130 [ 37.544097] ? proc_fail_nth_write+0x7b/0x180 [ 37.548574] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.553483] ? fsnotify+0x974/0x11b0 [ 37.557175] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.562083] ? debug_check_no_obj_freed+0x2c0/0x680 [ 37.567127] ? kvm_vcpu_release+0xa0/0xa0 [ 37.571253] do_vfs_ioctl+0x75a/0xff0 [ 37.575032] ? ioctl_preallocate+0x1a0/0x1a0 [ 37.579416] ? vfs_write+0x319/0x4d0 [ 37.583104] ? SyS_write+0x14d/0x210 [ 37.586889] ? security_file_ioctl+0x83/0xb0 [ 37.591272] SyS_ioctl+0x7f/0xb0 [ 37.594622] ? do_vfs_ioctl+0xff0/0xff0 [ 37.598584] do_syscall_64+0x1d5/0x640 [ 37.602454] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.607792] RIP: 0033:0x7fae72096759 [ 37.611488] RSP: 002b:00007ffc2483e9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 37.619185] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fae72096759 [ 37.626515] RDX: 00000000200000c0 RSI: 000000004010ae68 RDI: 0000000000000004 [ 37.633772] RBP: 00007ffc2483e9b0 R08: 0000000000000001 R09: 00007fae72050031 [ 37.641031] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 [ 37.648277] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.656310] [ 37.657915] Allocated by task 7971: [ 37.661536] kasan_kmalloc+0xeb/0x160 [ 37.665313] kmem_cache_alloc_trace+0x131/0x3d0 [ 37.670130] kvm_vm_ioctl_register_coalesced_mmio+0x51/0x330 [ 37.675901] kvm_vm_ioctl+0x795/0x1420 [ 37.679761] do_vfs_ioctl+0x75a/0xff0 [ 37.683544] SyS_ioctl+0x7f/0xb0 [ 37.686886] do_syscall_64+0x1d5/0x640 [ 37.690748] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.695913] [ 37.697517] Freed by task 7971: [ 37.700896] kasan_slab_free+0xc3/0x1a0 [ 37.704871] kfree+0xc9/0x250 [ 37.708140] kvm_io_bus_unregister_dev.cold+0xd8/0xf8 [ 37.713313] kvm_vm_ioctl_unregister_coalesced_mmio+0x17d/0x280 [ 37.719360] kvm_vm_ioctl+0x77d/0x1420 [ 37.723238] do_vfs_ioctl+0x75a/0xff0 [ 37.727028] SyS_ioctl+0x7f/0xb0 [ 37.730434] do_syscall_64+0x1d5/0x640 [ 37.734308] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.739476] [ 37.741091] The buggy address belongs to the object at ffff8880a9277200 [ 37.741091] which belongs to the cache kmalloc-64 of size 64 [ 37.753917] The buggy address is located 0 bytes inside of [ 37.753917] 64-byte region [ffff8880a9277200, ffff8880a9277240) [ 37.765508] The buggy address belongs to the page: [ 37.770417] page:ffffea0002a49dc0 count:1 mapcount:0 mapping:ffff8880a9277000 index:0xffff8880a9277380 [ 37.779868] flags: 0xfff00000000100(slab) [ 37.784695] raw: 00fff00000000100 ffff8880a9277000 ffff8880a9277380 000000010000001f [ 37.792639] raw: ffffea0002a5a420 ffffea0002a30120 ffff88813fe74340 0000000000000000 [ 37.800490] page dumped because: kasan: bad access detected [ 37.806191] [ 37.807793] Memory state around the buggy address: [ 37.812701] ffff8880a9277100: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 37.820032] ffff8880a9277180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.827461] >ffff8880a9277200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.834792] ^ [ 37.838220] ffff8880a9277280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.845551] ffff8880a9277300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.852889] ================================================================== [ 37.860343] Disabling lock debugging due to kernel taint [ 37.866739] Kernel panic - not syncing: panic_on_warn set ... [ 37.866739] [ 37.874113] CPU: 0 PID: 7971 Comm: syz-executor179 Tainted: G B 4.14.295-syzkaller #0 [ 37.883196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 37.892631] Call Trace: [ 37.895197] dump_stack+0x1b2/0x281 [ 37.898799] panic+0x1f9/0x42d [ 37.901965] ? add_taint.cold+0x16/0x16 [ 37.906002] ? ___preempt_schedule+0x16/0x18 [ 37.910385] kasan_end_report+0x43/0x49 [ 37.914525] kasan_report_error.cold+0xa7/0x191 [ 37.919357] ? kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.925564] __asan_report_load8_noabort+0x68/0x70 [ 37.930469] ? kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.936679] ? kvm_vm_create_worker_thread+0x200/0x200 [ 37.942095] kvm_vm_ioctl_unregister_coalesced_mmio+0x217/0x280 [ 37.948257] kvm_vm_ioctl+0x77d/0x1420 [ 37.952128] ? kvm_vcpu_release+0xa0/0xa0 [ 37.956254] ? get_pid_task+0xb8/0x130 [ 37.960116] ? proc_fail_nth_write+0x7b/0x180 [ 37.964758] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.969877] ? fsnotify+0x974/0x11b0 [ 37.973669] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 37.978729] ? debug_check_no_obj_freed+0x2c0/0x680 [ 37.983729] ? kvm_vcpu_release+0xa0/0xa0 [ 37.987861] do_vfs_ioctl+0x75a/0xff0 [ 37.991722] ? ioctl_preallocate+0x1a0/0x1a0 [ 37.996105] ? vfs_write+0x319/0x4d0 [ 37.999793] ? SyS_write+0x14d/0x210 [ 38.003481] ? security_file_ioctl+0x83/0xb0 [ 38.007949] SyS_ioctl+0x7f/0xb0 [ 38.011296] ? do_vfs_ioctl+0xff0/0xff0 [ 38.015242] do_syscall_64+0x1d5/0x640 [ 38.019106] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 38.024269] RIP: 0033:0x7fae72096759 [ 38.028039] RSP: 002b:00007ffc2483e9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 38.035769] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fae72096759 [ 38.043013] RDX: 00000000200000c0 RSI: 000000004010ae68 RDI: 0000000000000004 [ 38.050257] RBP: 00007ffc2483e9b0 R08: 0000000000000001 R09: 00007fae72050031 [ 38.057588] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 [ 38.064842] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 38.072289] Kernel Offset: disabled [ 38.075894] Rebooting in 86400 seconds..