[[0;32m OK [0m] Started Regular background program processing daemon.
Starting OpenBSD Secure Shell server...
Starting System Logging Service...
Starting Permit User Sessions...
[[0;32m OK [0m] Started System Logging Service.
[[0;32m OK [0m] Started Permit User Sessions.
[[0;32m OK [0m] Started OpenBSD Secure Shell server.
[[0;32m OK [0m] Started getty on tty2-tty6 if dbus and logind are not available.
[[0;32m OK [0m] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
[[0;32m OK [0m] Started Getty on tty6.
[[0;32m OK [0m] Started Getty on tty5.
[[0;32m OK [0m] Started Getty on tty4.
[[0;32m OK [0m] Started Getty on tty1.
[[0;32m OK [0m] Started Serial Getty on ttyS0.
[[0;32m OK [0m] Started Getty on tty3.
[[0;32m OK [0m] Started Getty on tty2.
[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 59.864010][ T7090] 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.
[ 59.914202][ T7090] ==================================================================
[ 59.922752][ T7090] BUG: KASAN: slab-out-of-bounds in __kvm_map_gfn+0x933/0xa10
[ 59.931224][ T7090] Read of size 8 at addr ffff88808e20b468 by task syz-executor368/7090
[ 59.939468][ T7090]
[ 59.942142][ T7090] CPU: 0 PID: 7090 Comm: syz-executor368 Not tainted 5.6.0-syzkaller #0
[ 59.950580][ T7090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 59.961592][ T7090] Call Trace:
[ 59.964977][ T7090] dump_stack+0x188/0x20d
[ 59.969318][ T7090] print_address_description.constprop.0.cold+0xd3/0x315
[ 59.976611][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 59.981545][ T7090] __kasan_report.cold+0x35/0x4d
[ 59.986486][ T7090] ? lock_release+0x7b0/0x800
[ 59.991267][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 59.996109][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 60.000984][ T7090] kasan_report+0x33/0x50
[ 60.005322][ T7090] __kvm_map_gfn+0x933/0xa10
[ 60.010287][ T7090] kvm_arch_vcpu_put+0x3b9/0x530
[ 60.015245][ T7090] ? kvm_arch_vcpu_load+0x7d0/0x7d0
[ 60.020582][ T7090] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 60.026329][ T7090] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 60.032440][ T7090] ? entry_SYSENTER_compat+0x70/0x7f
[ 60.037903][ T7090] vcpu_put+0x1b/0x70
[ 60.041890][ T7090] kvm_arch_vcpu_ioctl+0x1ae/0x2c20
[ 60.047219][ T7090] ? kvm_arch_vcpu_put+0x530/0x530
[ 60.052427][ T7090] ? lock_acquire+0x1f2/0x8f0
[ 60.057292][ T7090] ? kvm_vcpu_ioctl+0x175/0xe60
[ 60.062203][ T7090] ? lock_release+0x800/0x800
[ 60.066898][ T7090] ? find_held_lock+0x2d/0x110
[ 60.071865][ T7090] ? __mutex_lock+0x458/0x13c0
[ 60.076733][ T7090] ? find_held_lock+0x2d/0x110
[ 60.082552][ T7090] ? kvm_vcpu_ioctl+0x175/0xe60
[ 60.087482][ T7090] ? tomoyo_path_number_perm+0x1ee/0x4d0
[ 60.093120][ T7090] ? mutex_trylock+0x2c0/0x2c0
[ 60.097886][ T7090] ? lock_downgrade+0x840/0x840
[ 60.102986][ T7090] ? quarantine_put+0x119/0x1c0
[ 60.108156][ T7090] ? kfree+0x1eb/0x2b0
[ 60.112558][ T7090] ? tomoyo_path_number_perm+0x411/0x4d0
[ 60.118217][ T7090] ? lockdep_hardirqs_on+0x463/0x620
[ 60.127315][ T7090] ? tomoyo_path_number_perm+0x238/0x4d0
[ 60.133264][ T7090] kvm_vcpu_ioctl+0x866/0xe60
[ 60.138089][ T7090] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670
[ 60.144711][ T7090] ? __sanitizer_cov_trace_switch+0x45/0x70
[ 60.150784][ T7090] ? do_vfs_ioctl+0x50c/0x12d0
[ 60.155725][ T7090] ? ioctl_file_clone+0x180/0x180
[ 60.160927][ T7090] kvm_vcpu_compat_ioctl+0x1ab/0x350
[ 60.166266][ T7090] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 60.172249][ T7090] ? kvm_vcpu_ioctl+0xe60/0xe60
[ 60.177221][ T7090] ? unlock_page_memcg+0x30/0x30
[ 60.182311][ T7090] ? kvm_vcpu_ioctl+0xe60/0xe60
[ 60.187162][ T7090] __ia32_compat_sys_ioctl+0x23d/0x2b0
[ 60.192633][ T7090] do_fast_syscall_32+0x270/0xe90
[ 60.197662][ T7090] entry_SYSENTER_compat+0x70/0x7f
[ 60.202980][ T7090]
[ 60.205328][ T7090] Allocated by task 7090:
[ 60.209652][ T7090] save_stack+0x1b/0x80
[ 60.213792][ T7090] __kasan_kmalloc.constprop.0+0xbf/0xd0
[ 60.219417][ T7090] kvmalloc_node+0x61/0xf0
[ 60.223835][ T7090] kvm_set_memslot+0x115/0x1530
[ 60.228978][ T7090] __kvm_set_memory_region+0xcf7/0x1320
[ 60.234735][ T7090] __x86_set_memory_region+0x2a3/0x5a0
[ 60.240247][ T7090] vmx_create_vcpu+0x2107/0x2b40
[ 60.245200][ T7090] kvm_arch_vcpu_create+0x6ef/0xb80
[ 60.250551][ T7090] kvm_vm_ioctl+0x15f7/0x23e0
[ 60.255245][ T7090] kvm_vm_compat_ioctl+0x125/0x240
[ 60.261123][ T7090] __ia32_compat_sys_ioctl+0x23d/0x2b0
[ 60.266594][ T7090] do_fast_syscall_32+0x270/0xe90
[ 60.271796][ T7090] entry_SYSENTER_compat+0x70/0x7f
[ 60.277869][ T7090]
[ 60.280321][ T7090] Freed by task 0:
[ 60.284057][ T7090] (stack is not available)
[ 60.288470][ T7090]
[ 60.290788][ T7090] The buggy address belongs to the object at ffff88808e20b000
[ 60.290788][ T7090] which belongs to the cache kmalloc-2k of size 2048
[ 60.304867][ T7090] The buggy address is located 1128 bytes inside of
[ 60.304867][ T7090] 2048-byte region [ffff88808e20b000, ffff88808e20b800)
[ 60.318313][ T7090] The buggy address belongs to the page:
[ 60.323950][ T7090] page:ffffea00023882c0 refcount:1 mapcount:0 mapping:00000000044fe846 index:0x0
[ 60.333046][ T7090] flags: 0xfffe0000000200(slab)
[ 60.337892][ T7090] raw: 00fffe0000000200 ffffea00027cbcc8 ffffea0002591e08 ffff8880aa000e00
[ 60.346469][ T7090] raw: 0000000000000000 ffff88808e20b000 0000000100000001 0000000000000000
[ 60.355042][ T7090] page dumped because: kasan: bad access detected
[ 60.361467][ T7090]
[ 60.363787][ T7090] Memory state around the buggy address:
[ 60.369503][ T7090] ffff88808e20b300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 60.377775][ T7090] ffff88808e20b380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 60.385971][ T7090] >ffff88808e20b400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
[ 60.394301][ T7090] ^
[ 60.402843][ T7090] ffff88808e20b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 60.411064][ T7090] ffff88808e20b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 60.419639][ T7090] ==================================================================
[ 60.427737][ T7090] Disabling lock debugging due to kernel taint
[ 60.434095][ T7090] Kernel panic - not syncing: panic_on_warn set ...
[ 60.440708][ T7090] CPU: 0 PID: 7090 Comm: syz-executor368 Tainted: G B 5.6.0-syzkaller #0
[ 60.450435][ T7090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 60.460502][ T7090] Call Trace:
[ 60.463831][ T7090] dump_stack+0x188/0x20d
[ 60.468185][ T7090] panic+0x2e3/0x75c
[ 60.472100][ T7090] ? add_taint.cold+0x16/0x16
[ 60.476877][ T7090] ? retint_kernel+0x2b/0x2b
[ 60.481487][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 60.486269][ T7090] ? trace_hardirqs_on+0x55/0x220
[ 60.491304][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 60.496078][ T7090] end_report+0x43/0x49
[ 60.500243][ T7090] __kasan_report.cold+0xd/0x4d
[ 60.505265][ T7090] ? lock_release+0x7b0/0x800
[ 60.509951][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 60.514812][ T7090] ? __kvm_map_gfn+0x933/0xa10
[ 60.519843][ T7090] kasan_report+0x33/0x50
[ 60.524245][ T7090] __kvm_map_gfn+0x933/0xa10
[ 60.528856][ T7090] kvm_arch_vcpu_put+0x3b9/0x530
[ 60.533801][ T7090] ? kvm_arch_vcpu_load+0x7d0/0x7d0
[ 60.538992][ T7090] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 60.544610][ T7090] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 60.550581][ T7090] ? entry_SYSENTER_compat+0x70/0x7f
[ 60.555854][ T7090] vcpu_put+0x1b/0x70
[ 60.559836][ T7090] kvm_arch_vcpu_ioctl+0x1ae/0x2c20
[ 60.565032][ T7090] ? kvm_arch_vcpu_put+0x530/0x530
[ 60.570307][ T7090] ? lock_acquire+0x1f2/0x8f0
[ 60.574976][ T7090] ? kvm_vcpu_ioctl+0x175/0xe60
[ 60.579937][ T7090] ? lock_release+0x800/0x800
[ 60.584614][ T7090] ? find_held_lock+0x2d/0x110
[ 60.590177][ T7090] ? __mutex_lock+0x458/0x13c0
[ 60.595313][ T7090] ? find_held_lock+0x2d/0x110
[ 60.601825][ T7090] ? kvm_vcpu_ioctl+0x175/0xe60
[ 60.607169][ T7090] ? tomoyo_path_number_perm+0x1ee/0x4d0
[ 60.612884][ T7090] ? mutex_trylock+0x2c0/0x2c0
[ 60.617794][ T7090] ? lock_downgrade+0x840/0x840
[ 60.622855][ T7090] ? quarantine_put+0x119/0x1c0
[ 60.627900][ T7090] ? kfree+0x1eb/0x2b0
[ 60.632096][ T7090] ? tomoyo_path_number_perm+0x411/0x4d0
[ 60.637722][ T7090] ? lockdep_hardirqs_on+0x463/0x620
[ 60.643115][ T7090] ? tomoyo_path_number_perm+0x238/0x4d0
[ 60.649369][ T7090] kvm_vcpu_ioctl+0x866/0xe60
[ 60.654086][ T7090] ? kvm_get_dirty_log_protect.isra.0+0x670/0x670
[ 60.660533][ T7090] ? __sanitizer_cov_trace_switch+0x45/0x70
[ 60.666463][ T7090] ? do_vfs_ioctl+0x50c/0x12d0
[ 60.671215][ T7090] ? ioctl_file_clone+0x180/0x180
[ 60.676262][ T7090] kvm_vcpu_compat_ioctl+0x1ab/0x350
[ 60.681667][ T7090] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 60.687636][ T7090] ? kvm_vcpu_ioctl+0xe60/0xe60
[ 60.692515][ T7090] ? unlock_page_memcg+0x30/0x30
[ 60.697441][ T7090] ? kvm_vcpu_ioctl+0xe60/0xe60
[ 60.702294][ T7090] __ia32_compat_sys_ioctl+0x23d/0x2b0
[ 60.707743][ T7090] do_fast_syscall_32+0x270/0xe90
[ 60.712758][ T7090] entry_SYSENTER_compat+0x70/0x7f
[ 60.719539][ T7090] Kernel Offset: disabled
[ 60.723870][ T7090] Rebooting in 86400 seconds..