[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.513278][ T7204] IPVS: ftp: loaded support on port[0] = 21 [ 67.550473][ T7204] 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. [ 67.606078][ T7204] ================================================================== [ 67.614266][ T7204] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 67.622928][ T7204] Read of size 8 at addr ffff8880a6092468 by task syz-executor842/7204 [ 67.631142][ T7204] [ 67.633458][ T7204] CPU: 1 PID: 7204 Comm: syz-executor842 Not tainted 5.6.0-syzkaller #0 [ 67.641769][ T7204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.652159][ T7204] Call Trace: [ 67.655436][ T7204] dump_stack+0x188/0x20d [ 67.659753][ T7204] print_address_description.constprop.0.cold+0xd3/0x315 [ 67.666844][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 67.672808][ T7204] __kasan_report.cold+0x35/0x4d [ 67.677823][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 67.683810][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 67.689765][ T7204] kasan_report+0x33/0x50 [ 67.694077][ T7204] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 67.699910][ T7204] ? __kvm_write_guest_page+0x170/0x170 [ 67.705465][ T7204] kvm_lapic_set_vapic_addr+0x88/0x180 [ 67.710921][ T7204] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 67.716137][ T7204] ? kvm_arch_vcpu_put+0x530/0x530 [ 67.721550][ T7204] ? lock_acquire+0x1f2/0x8f0 [ 67.726218][ T7204] ? kvm_vcpu_ioctl+0x175/0xe60 [ 67.731055][ T7204] ? lock_release+0x800/0x800 [ 67.735715][ T7204] ? find_held_lock+0x2d/0x110 [ 67.740556][ T7204] ? __mutex_lock+0x458/0x13c0 [ 67.745404][ T7204] ? kfree+0x1eb/0x2b0 [ 67.749451][ T7204] ? kvm_vcpu_ioctl+0x175/0xe60 [ 67.754283][ T7204] ? mutex_trylock+0x2c0/0x2c0 [ 67.759025][ T7204] ? tomoyo_execute_permission+0x470/0x470 [ 67.764827][ T7204] kvm_vcpu_ioctl+0x866/0xe60 [ 67.769485][ T7204] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.775889][ T7204] ? ioctl_file_clone+0x180/0x180 [ 67.780897][ T7204] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.786422][ T7204] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.792416][ T7204] ? down_read_nested+0x420/0x420 [ 67.797435][ T7204] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 67.803836][ T7204] ksys_ioctl+0x11a/0x180 [ 67.808151][ T7204] __x64_sys_ioctl+0x6f/0xb0 [ 67.812743][ T7204] ? lockdep_hardirqs_on+0x463/0x620 [ 67.818019][ T7204] do_syscall_64+0xf6/0x7d0 [ 67.822519][ T7204] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.828418][ T7204] RIP: 0033:0x440a59 [ 67.832463][ T7204] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.852583][ T7204] RSP: 002b:00007ffc05830798 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.860980][ T7204] RAX: ffffffffffffffda RBX: 00000000004a21f0 RCX: 0000000000440a59 [ 67.869129][ T7204] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 67.877094][ T7204] RBP: 00007ffc058307a0 R08: 0000000120080522 R09: 0000000120080522 [ 67.885054][ T7204] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a21f0 [ 67.893016][ T7204] R13: 0000000000401ff0 R14: 0000000000000000 R15: 0000000000000000 [ 67.900989][ T7204] [ 67.903308][ T7204] Allocated by task 7204: [ 67.907657][ T7204] save_stack+0x1b/0x40 [ 67.911793][ T7204] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.917451][ T7204] kvmalloc_node+0x61/0xf0 [ 67.921847][ T7204] kvm_set_memslot+0x115/0x1530 [ 67.926677][ T7204] __kvm_set_memory_region+0xcf7/0x1320 [ 67.932200][ T7204] __x86_set_memory_region+0x2a3/0x5a0 [ 67.937636][ T7204] vmx_create_vcpu+0x2107/0x2b40 [ 67.942562][ T7204] kvm_arch_vcpu_create+0x6ef/0xb80 [ 67.947739][ T7204] kvm_vm_ioctl+0x15f7/0x23e0 [ 67.952402][ T7204] ksys_ioctl+0x11a/0x180 [ 67.956709][ T7204] __x64_sys_ioctl+0x6f/0xb0 [ 67.961279][ T7204] do_syscall_64+0xf6/0x7d0 [ 67.965780][ T7204] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 67.971642][ T7204] [ 67.974063][ T7204] Freed by task 0: [ 67.977842][ T7204] (stack is not available) [ 67.982228][ T7204] [ 67.984972][ T7204] The buggy address belongs to the object at ffff8880a6092000 [ 67.984972][ T7204] which belongs to the cache kmalloc-2k of size 2048 [ 67.999460][ T7204] The buggy address is located 1128 bytes inside of [ 67.999460][ T7204] 2048-byte region [ffff8880a6092000, ffff8880a6092800) [ 68.013324][ T7204] The buggy address belongs to the page: [ 68.018953][ T7204] page:ffffea0002982480 refcount:1 mapcount:0 mapping:00000000e5782c39 index:0x0 [ 68.028039][ T7204] flags: 0xfffe0000000200(slab) [ 68.032885][ T7204] raw: 00fffe0000000200 ffffea000279d608 ffffea00027fdd88 ffff8880aa000e00 [ 68.041465][ T7204] raw: 0000000000000000 ffff8880a6092000 0000000100000001 0000000000000000 [ 68.050123][ T7204] page dumped because: kasan: bad access detected [ 68.056696][ T7204] [ 68.059011][ T7204] Memory state around the buggy address: [ 68.064636][ T7204] ffff8880a6092300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.072682][ T7204] ffff8880a6092380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.080732][ T7204] >ffff8880a6092400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 68.090445][ T7204] ^ [ 68.097981][ T7204] ffff8880a6092480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.106056][ T7204] ffff8880a6092500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.114532][ T7204] ================================================================== [ 68.122838][ T7204] Disabling lock debugging due to kernel taint [ 68.130022][ T7204] Kernel panic - not syncing: panic_on_warn set ... [ 68.136640][ T7204] CPU: 0 PID: 7204 Comm: syz-executor842 Tainted: G B 5.6.0-syzkaller #0 [ 68.146524][ T7204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.156569][ T7204] Call Trace: [ 68.159842][ T7204] dump_stack+0x188/0x20d [ 68.164279][ T7204] panic+0x2e3/0x75c [ 68.168168][ T7204] ? add_taint.cold+0x16/0x16 [ 68.172836][ T7204] ? preempt_schedule_common+0x5e/0xc0 [ 68.178322][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 68.184313][ T7204] ? preempt_schedule_thunk+0x16/0x18 [ 68.189855][ T7204] ? trace_hardirqs_on+0x55/0x220 [ 68.195135][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 68.201092][ T7204] end_report+0x4d/0x53 [ 68.205235][ T7204] __kasan_report.cold+0xd/0x4d [ 68.210072][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 68.216033][ T7204] ? __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 68.221995][ T7204] kasan_report+0x33/0x50 [ 68.226303][ T7204] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 [ 68.232104][ T7204] ? __kvm_write_guest_page+0x170/0x170 [ 68.238182][ T7204] kvm_lapic_set_vapic_addr+0x88/0x180 [ 68.243622][ T7204] kvm_arch_vcpu_ioctl+0xf0d/0x2c20 [ 68.248800][ T7204] ? kvm_arch_vcpu_put+0x530/0x530 [ 68.253890][ T7204] ? lock_acquire+0x1f2/0x8f0 [ 68.258974][ T7204] ? kvm_vcpu_ioctl+0x175/0xe60 [ 68.263815][ T7204] ? lock_release+0x800/0x800 [ 68.268903][ T7204] ? find_held_lock+0x2d/0x110 [ 68.273668][ T7204] ? __mutex_lock+0x458/0x13c0 [ 68.278419][ T7204] ? kfree+0x1eb/0x2b0 [ 68.282471][ T7204] ? kvm_vcpu_ioctl+0x175/0xe60 [ 68.287310][ T7204] ? mutex_trylock+0x2c0/0x2c0 [ 68.292075][ T7204] ? tomoyo_execute_permission+0x470/0x470 [ 68.297877][ T7204] kvm_vcpu_ioctl+0x866/0xe60 [ 68.302537][ T7204] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.308944][ T7204] ? ioctl_file_clone+0x180/0x180 [ 68.314025][ T7204] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.320079][ T7204] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.326179][ T7204] ? down_read_nested+0x420/0x420 [ 68.331189][ T7204] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670 [ 68.337690][ T7204] ksys_ioctl+0x11a/0x180 [ 68.342027][ T7204] __x64_sys_ioctl+0x6f/0xb0 [ 68.347133][ T7204] ? lockdep_hardirqs_on+0x463/0x620 [ 68.352393][ T7204] do_syscall_64+0xf6/0x7d0 [ 68.356965][ T7204] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.362834][ T7204] RIP: 0033:0x440a59 [ 68.366760][ T7204] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.386469][ T7204] RSP: 002b:00007ffc05830798 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.394887][ T7204] RAX: ffffffffffffffda RBX: 00000000004a21f0 RCX: 0000000000440a59 [ 68.402844][ T7204] RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 [ 68.411145][ T7204] RBP: 00007ffc058307a0 R08: 0000000120080522 R09: 0000000120080522 [ 68.419116][ T7204] R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a21f0 [ 68.427072][ T7204] R13: 0000000000401ff0 R14: 0000000000000000 R15: 0000000000000000 [ 68.436412][ T7204] Kernel Offset: disabled [ 68.440789][ T7204] Rebooting in 86400 seconds..