Warning: Permanently added '10.128.1.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.960604] kauditd_printk_skb: 2 callbacks suppressed [ 51.960619] audit: type=1400 audit(1561243920.909:36): avc: denied { map } for pid=7773 comm="syz-executor831" path="/root/syz-executor831863447" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.964172] 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. [ 52.018807] BUG: unable to handle kernel paging request at ffffed12f8ff841f [ 52.025949] PGD 21fff0067 P4D 21fff0067 PUD 0 [ 52.030643] Oops: 0000 [#1] PREEMPT SMP KASAN [ 52.035130] CPU: 1 PID: 7773 Comm: syz-executor831 Not tainted 4.19.55 #27 [ 52.042134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.051665] RIP: 0010:coalesced_mmio_write+0x288/0x440 [ 52.056927] Code: 38 d0 7c 08 84 d2 0f 85 cc 01 00 00 41 8b 47 04 48 8d 14 40 49 8d 7c d7 08 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 92 01 00 00 48 8d 14 40 48 b9 00 00 00 00 00 fc [ 52.075810] RSP: 0018:ffff88809409f130 EFLAGS: 00010a02 [ 52.081155] RAX: 00000000f7d5760a RBX: 0000000000000000 RCX: 1ffff112f8ff841f [ 52.088421] RDX: dffffc0000000000 RSI: ffffffff8107bf9c RDI: ffff8897c7fc20f8 [ 52.095688] RBP: ffff88809409f180 R08: ffff88808dbe6080 R09: fffff52000bc74d9 [ 52.102944] R10: fffff52000bc74d8 R11: ffffc90005e3a6c3 R12: 0000000000000001 [ 52.111668] R13: ffff8880743bcc90 R14: 0000000000000001 R15: ffff88808bf91000 [ 52.119210] FS: 0000000001018940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 52.127434] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.133301] CR2: ffffed12f8ff841f CR3: 00000000941a4000 CR4: 00000000001426e0 [ 52.140647] Call Trace: [ 52.143237] ? coalesced_mmio_destructor+0x170/0x170 [ 52.148443] __kvm_io_bus_write+0x29b/0x380 [ 52.152751] kvm_io_bus_write+0x15c/0x290 [ 52.156886] ? __bpf_trace_kvm_async_get_page_class+0x30/0x30 [ 52.162767] ? __lock_is_held+0xb6/0x140 [ 52.166845] write_mmio+0x175/0x4e0 [ 52.170557] emulator_read_write_onepage+0x429/0xd50 [ 52.175646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.181169] emulator_read_write+0x1b7/0x5a0 [ 52.185567] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.191308] emulator_write_emulated+0x3c/0x50 [ 52.195906] segmented_write+0xf0/0x150 [ 52.199888] ? em_fxsave+0x50/0x50 [ 52.203416] ? memcpy+0x46/0x50 [ 52.206678] writeback+0x3f4/0x6a0 [ 52.210199] ? __emulate_int_real+0x6c0/0x6c0 [ 52.214677] ? emulator_read_gpr+0x80/0xc0 [ 52.218898] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.224434] ? fastop+0x18d/0x2b0 [ 52.234670] ? em_salc+0x8/0x8 [ 52.237852] x86_emulate_insn+0x1de1/0x48f0 [ 52.242160] ? init_decode_cache+0xc0/0xc0 [ 52.246379] ? __lock_is_held+0xb6/0x140 [ 52.250426] x86_emulate_instruction+0xc84/0x1c20 [ 52.255255] ? write_emulate+0x40/0x40 [ 52.261045] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 52.266056] ? mmio_info_in_cache+0x143/0x560 [ 52.271414] kvm_mmu_page_fault+0x326/0x1650 [ 52.275814] ? __lock_acquire+0x6eb/0x48f0 [ 52.280074] ? make_mmu_pages_available.isra.0+0x4b0/0x4b0 [ 52.285685] ? __lock_is_held+0xb6/0x140 [ 52.289760] handle_ept_violation+0x1c9/0x500 [ 52.294342] ? vmx_write_l1_tsc_offset+0x540/0x540 [ 52.299354] vmx_handle_exit+0x276/0x1650 [ 52.303518] ? lock_acquire+0x16f/0x3f0 [ 52.307494] ? vcpu_enter_guest+0x108f/0x6130 [ 52.311991] vcpu_enter_guest+0x1244/0x6130 [ 52.316299] ? mark_held_locks+0x100/0x100 [ 52.320519] ? find_held_lock+0x35/0x130 [ 52.324563] ? kvm_vcpu_ioctl+0x181/0xf90 [ 52.328698] ? emulator_read_emulated+0x50/0x50 [ 52.333355] ? lock_acquire+0x16f/0x3f0 [ 52.337334] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 52.342773] kvm_arch_vcpu_ioctl_run+0x417/0x16c0 [ 52.347601] ? kvm_arch_vcpu_ioctl_run+0x417/0x16c0 [ 52.352604] kvm_vcpu_ioctl+0x4dc/0xf90 [ 52.356567] ? kvm_vcpu_block+0xcc0/0xcc0 [ 52.360711] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.366235] ? check_preemption_disabled+0x48/0x290 [ 52.371251] ? check_preemption_disabled+0x48/0x290 [ 52.376259] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 52.381523] ? __set_current_blocked+0xe4/0x120 [ 52.386180] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.391703] ? signal_setup_done+0xbe/0x2a0 [ 52.396045] ? set_current_blocked+0x50/0x50 [ 52.400462] ? rcu_read_lock_sched_held+0x110/0x130 [ 52.405463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.410994] ? kvm_vcpu_block+0xcc0/0xcc0 [ 52.415139] do_vfs_ioctl+0xd5f/0x1380 [ 52.419020] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.424564] ? selinux_file_ioctl+0x125/0x5e0 [ 52.429139] ? ioctl_preallocate+0x210/0x210 [ 52.433532] ? selinux_file_mprotect+0x620/0x620 [ 52.438284] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.443827] ? __sys_sendmsg+0xbb/0x1d0 [ 52.447789] ? __ia32_sys_shutdown+0x80/0x80 [ 52.452208] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.458005] ? security_file_ioctl+0x8d/0xc0 [ 52.463463] ksys_ioctl+0xab/0xd0 [ 52.466914] __x64_sys_ioctl+0x73/0xb0 [ 52.470789] do_syscall_64+0xfd/0x620 [ 52.474577] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.479765] RIP: 0033:0x4444e9 [ 52.482942] 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 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 52.501830] RSP: 002b:00007ffe0192daa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 52.509536] RAX: ffffffffffffffda RBX: 00007ffe0192dab0 RCX: 00000000004444e9 [ 52.516789] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 52.524045] RBP: 0000000000000000 R08: 0000000000402240 R09: 0000000000402240 [ 52.531303] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000405590 [ 52.538561] R13: 0000000000405620 R14: 0000000000000000 R15: 0000000000000000 [ 52.545830] Modules linked in: [ 52.549043] CR2: ffffed12f8ff841f [ 52.552488] ---[ end trace 6711d194e7d5b8b4 ]--- [ 52.557242] RIP: 0010:coalesced_mmio_write+0x288/0x440 [ 52.562507] Code: 38 d0 7c 08 84 d2 0f 85 cc 01 00 00 41 8b 47 04 48 8d 14 40 49 8d 7c d7 08 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 92 01 00 00 48 8d 14 40 48 b9 00 00 00 00 00 fc [ 52.581395] RSP: 0018:ffff88809409f130 EFLAGS: 00010a02 [ 52.586743] RAX: 00000000f7d5760a RBX: 0000000000000000 RCX: 1ffff112f8ff841f [ 52.594015] RDX: dffffc0000000000 RSI: ffffffff8107bf9c RDI: ffff8897c7fc20f8 [ 52.601278] RBP: ffff88809409f180 R08: ffff88808dbe6080 R09: fffff52000bc74d9 [ 52.608533] R10: fffff52000bc74d8 R11: ffffc90005e3a6c3 R12: 0000000000000001 [ 52.615785] R13: ffff8880743bcc90 R14: 0000000000000001 R15: ffff88808bf91000 [ 52.623038] FS: 0000000001018940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 52.631248] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.637115] CR2: ffffed12f8ff841f CR3: 00000000941a4000 CR4: 00000000001426e0 [ 52.644371] Kernel panic - not syncing: Fatal exception [ 52.650881] Kernel Offset: disabled [ 52.654510] Rebooting in 86400 seconds..