Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.96' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.753729][ T6875] 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. [ 63.803636][ T6875] ------------[ cut here ]------------ [ 63.809407][ T6875] WARNING: CPU: 0 PID: 6875 at include/linux/entry-kvm.h:75 kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 63.821480][ T6875] Kernel panic - not syncing: panic_on_warn set ... [ 63.828079][ T6875] CPU: 0 PID: 6875 Comm: syz-executor382 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 63.837948][ T6875] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.847983][ T6875] Call Trace: [ 63.851327][ T6875] dump_stack+0x18f/0x20d [ 63.855643][ T6875] panic+0x2e3/0x75c [ 63.859524][ T6875] ? __warn_printk+0xf3/0xf3 [ 63.864091][ T6875] ? printk+0xba/0xed [ 63.868054][ T6875] ? log_store.cold+0x16/0x16 [ 63.873666][ T6875] ? __warn.cold+0x5/0x4a [ 63.877976][ T6875] ? __warn+0xd6/0x1f2 [ 63.882026][ T6875] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 63.887726][ T6875] __warn.cold+0x20/0x4a [ 63.892002][ T6875] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 63.897720][ T6875] report_bug+0x1bd/0x210 [ 63.902038][ T6875] handle_bug+0x38/0x90 [ 63.906172][ T6875] exc_invalid_op+0x14/0x40 [ 63.910653][ T6875] asm_exc_invalid_op+0x12/0x20 [ 63.915485][ T6875] RIP: 0010:kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 63.921791][ T6875] Code: d7 74 64 00 45 85 e4 74 23 e8 4d 78 64 00 65 44 8b 25 f1 44 f2 7e 31 ff 44 89 e6 e8 bb 74 64 00 45 85 e4 74 07 e8 31 78 64 00 <0f> 0b e8 2a 78 64 00 48 8b 44 24 08 80 38 00 0f 85 1e 0f 00 00 48 [ 63.941372][ T6875] RSP: 0018:ffffc90005697d18 EFLAGS: 00010293 [ 63.947463][ T6875] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff810fc7d5 [ 63.955412][ T6875] RDX: ffff8880919cc3c0 RSI: ffffffff810fc7df RDI: 0000000000000005 [ 63.963368][ T6875] RBP: ffff88809474c040 R08: 0000000000000001 R09: ffff88809474c07f [ 63.971316][ T6875] R10: 0000000000000000 R11: 1ffffffff184a49c R12: 0000000000000001 [ 63.979319][ T6875] R13: ffff88809474c424 R14: ffff88809474c130 R15: ffff88809474c3d0 [ 63.987287][ T6875] ? kvm_arch_vcpu_ioctl_run+0x5a5/0x17f0 [ 63.992985][ T6875] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 63.998733][ T6875] ? kvm_arch_vcpu_ioctl_run+0x5af/0x17f0 [ 64.004448][ T6875] kvm_vcpu_ioctl+0x467/0xdf0 [ 64.009108][ T6875] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 64.014914][ T6875] ? generic_block_fiemap+0x60/0x60 [ 64.020094][ T6875] ? __up_read+0x1a1/0x7b0 [ 64.024491][ T6875] ? _down_write_nest_lock+0x150/0x150 [ 64.030029][ T6875] ? lock_is_held_type+0xbb/0xf0 [ 64.034966][ T6875] ? kvm_gfn_to_hva_cache_init+0x1a0/0x1a0 [ 64.040751][ T6875] __x64_sys_ioctl+0x193/0x200 [ 64.045512][ T6875] do_syscall_64+0x2d/0x70 [ 64.049908][ T6875] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.055783][ T6875] RIP: 0033:0x4412d9 [ 64.059744][ T6875] Code: e8 fc ab 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 1b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.079334][ T6875] RSP: 002b:00007ffcdd96a9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 64.087731][ T6875] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412d9 [ 64.095682][ T6875] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 64.103635][ T6875] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 64.111583][ T6875] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402080 [ 64.119546][ T6875] R13: 0000000000402110 R14: 0000000000000000 R15: 0000000000000000 [ 64.129012][ T6875] Kernel Offset: disabled [ 64.133392][ T6875] Rebooting in 86400 seconds..