sshd (6012) used greatest stack depth: 15632 bytes left L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6030 Comm: syz-executor691 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xa00/0x4c20 kernel/locking/lockdep.c:3218 Code: 28 00 00 00 0f 85 3e 2b 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 aa 2c 00 00 49 81 7d 00 60 e2 52 8a 0f 84 3d f7 RSP: 0018:ffff8801bf966ff0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000039 RSI: 0000000000000000 RDI: 00000000000001c8 RBP: ffff8801bf967378 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8801c09b6580 R12: ffff8801c09b6580 R13: 00000000000001c8 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1655c4d700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f65bb7bc000 CR3: 00000001c09d4000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] kvm_ioapic_scan_entry+0x7f/0x3c0 arch/x86/kvm/ioapic.c:246 vcpu_scan_ioapic arch/x86/kvm/x86.c:7458 [inline] vcpu_enter_guest arch/x86/kvm/x86.c:7600 [inline] vcpu_run arch/x86/kvm/x86.c:7872 [inline] kvm_arch_vcpu_ioctl_run+0x32c4/0x72b0 arch/x86/kvm/x86.c:8072 kvm_vcpu_ioctl+0x5c8/0x1150 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445a69 Code: e8 8c bc 02 00 48 83 c4 18 c3 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 0f 83 cb 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1655c4cce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 0000000000445a69 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000006dbc5c R13: 00007ffc3461a4ef R14: 00007f1655c4d9c0 R15: 00000000006dbd4c Modules linked in: ---[ end trace 97f58e52773bf6cc ]--- RIP: 0010:__lock_acquire+0xa00/0x4c20 kernel/locking/lockdep.c:3218 Code: 28 00 00 00 0f 85 3e 2b 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 aa 2c 00 00 49 81 7d 00 60 e2 52 8a 0f 84 3d f7 RSP: 0018:ffff8801bf966ff0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000039 RSI: 0000000000000000 RDI: 00000000000001c8 RBP: ffff8801bf967378 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8801c09b6580 R12: ffff8801c09b6580 R13: 00000000000001c8 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1655c4d700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f65bb7bc000 CR3: 00000001c09d4000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400