[ 44.585555] audit: type=1800 audit(1561242090.235:30): pid=7863 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 49.712350] kauditd_printk_skb: 4 callbacks suppressed [ 49.712366] audit: type=1400 audit(1561242095.395:35): avc: denied { map } for pid=8038 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.232' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 60.010027] audit: type=1400 audit(1561242105.695:36): avc: denied { map } for pid=8050 comm="syz-executor293" path="/root/syz-executor293418239" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 60.023852] 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. [ 60.138262] BUG: unable to handle kernel paging request at ffffed12324540b3 [ 60.145418] PGD 21fff0067 P4D 21fff0067 PUD 0 [ 60.150046] Oops: 0000 [#1] PREEMPT SMP KASAN [ 60.153841] kobject: 'kvm' (000000008149197d): kobject_uevent_env [ 60.156084] CPU: 1 PID: 8064 Comm: syz-executor293 Not tainted 4.19.55 #27 [ 60.156093] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.156115] RIP: 0010:coalesced_mmio_write+0x288/0x440 [ 60.156133] 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 [ 60.162973] kobject: 'kvm' (000000008149197d): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 60.169384] RSP: 0018:ffff888098037100 EFLAGS: 00010a02 [ 60.169396] RAX: 00000000b52b40e6 RBX: 0000000000000f7c RCX: 1ffff112324540b3 [ 60.169405] RDX: dffffc0000000000 RSI: ffffffff8107bf9c RDI: ffff8891922a0598 [ 60.169413] RBP: ffff888098037150 R08: ffff888096b26400 R09: fffff52000bc9cd9 [ 60.169421] R10: fffff52000bc9cd8 R11: ffffc90005e4e6c3 R12: 0000000000000004 [ 60.169428] R13: ffff88809f217090 R14: 0000000000000004 R15: ffff8880961bf000 [ 60.169447] FS: 00007f9b29317700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 60.254943] kobject: 'kvm' (000000008149197d): kobject_uevent_env [ 60.262127] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.262136] CR2: ffffed12324540b3 CR3: 00000000a0dc1000 CR4: 00000000001426e0 [ 60.262146] Call Trace: [ 60.262174] ? coalesced_mmio_destructor+0x170/0x170 [ 60.262192] __kvm_io_bus_write+0x29b/0x380 [ 60.262211] kvm_io_bus_write+0x15c/0x290 [ 60.297985] ? __bpf_trace_kvm_async_get_page_class+0x30/0x30 [ 60.303981] ? __lock_is_held+0xb6/0x140 [ 60.308065] write_mmio+0x175/0x4e0 [ 60.311986] emulator_read_write_onepage+0x429/0xd50 [ 60.317111] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.322673] emulator_read_write+0x1b7/0x5a0 [ 60.327106] emulator_write_emulated+0x3c/0x50 [ 60.331707] segmented_write+0xf0/0x150 [ 60.335699] ? em_fxsave+0x50/0x50 [ 60.339251] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.344801] ? __do_insn_fetch_bytes+0x490/0x6f0 [ 60.349568] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 60.355147] push+0x1e8/0x310 [ 60.358259] ? segmented_write+0x150/0x150 [ 60.362496] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 60.367692] ? trace_hardirqs_on+0x67/0x220 [ 60.372015] ? push+0x310/0x310 [ 60.375299] em_push+0x7d/0x90 [ 60.378493] x86_emulate_insn+0x653/0x48f0 [ 60.382741] ? init_decode_cache+0xc0/0xc0 [ 60.386974] ? __lock_is_held+0xb6/0x140 [ 60.391042] x86_emulate_instruction+0xc84/0x1c20 [ 60.395893] ? write_emulate+0x40/0x40 [ 60.399791] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.404818] ? mmio_info_in_cache+0x143/0x560 [ 60.409318] kvm_mmu_page_fault+0x326/0x1650 [ 60.413739] ? __lock_acquire+0x6eb/0x48f0 [ 60.417977] ? kvm_arch_vcpu_load+0x574/0x880 [ 60.422483] ? make_mmu_pages_available.isra.0+0x4b0/0x4b0 [ 60.428124] ? __lock_is_held+0xb6/0x140 [ 60.432189] handle_ept_violation+0x1c9/0x500 [ 60.436689] ? vmx_write_l1_tsc_offset+0x540/0x540 [ 60.441712] vmx_handle_exit+0x276/0x1650 [ 60.445866] ? lock_acquire+0x16f/0x3f0 [ 60.449843] ? vcpu_enter_guest+0x108f/0x6130 [ 60.454347] vcpu_enter_guest+0x1244/0x6130 [ 60.458673] ? kvm_vcpu_ioctl+0x181/0xf90 [ 60.462826] ? emulator_read_emulated+0x50/0x50 [ 60.467500] ? lock_acquire+0x16f/0x3f0 [ 60.471485] ? kvm_check_async_pf_completion+0x2d8/0x440 [ 60.476951] kvm_arch_vcpu_ioctl_run+0x417/0x16c0 [ 60.481806] ? kvm_arch_vcpu_ioctl_run+0x417/0x16c0 [ 60.486830] kvm_vcpu_ioctl+0x4dc/0xf90 [ 60.490815] ? kvm_vcpu_block+0xcc0/0xcc0 [ 60.494988] ? mark_held_locks+0x100/0x100 [ 60.499424] ? do_futex+0x17d/0x1d90 [ 60.503163] ? userfaultfd_unmap_prep+0x490/0x490 [ 60.508044] ? __fget+0x340/0x540 [ 60.511526] ? find_held_lock+0x35/0x130 [ 60.515613] ? __fget+0x340/0x540 [ 60.519088] ? kvm_vcpu_block+0xcc0/0xcc0 [ 60.523343] do_vfs_ioctl+0xd5f/0x1380 [ 60.527245] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.532795] ? selinux_file_ioctl+0x125/0x5e0 [ 60.537303] ? ioctl_preallocate+0x210/0x210 [ 60.542239] ? selinux_file_mprotect+0x620/0x620 [ 60.547305] ? iterate_fd+0x360/0x360 [ 60.551124] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.556939] ? security_file_ioctl+0x8d/0xc0 [ 60.561372] ksys_ioctl+0xab/0xd0 [ 60.564861] __x64_sys_ioctl+0x73/0xb0 [ 60.568771] do_syscall_64+0xfd/0x620 [ 60.572582] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.577772] RIP: 0033:0x449e09 [ 60.580976] Code: e8 ec e7 ff ff 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 ff fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.599898] RSP: 002b:00007f9b29316ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 60.607632] RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 0000000000449e09 [ 60.614927] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 60.622229] RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000 [ 60.629515] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c [ 60.636805] R13: 00007ffcb611b4df R14: 00007f9b293179c0 R15: 0000000000000000 [ 60.644087] Modules linked in: [ 60.647479] CR2: ffffed12324540b3 [ 60.650938] ---[ end trace 77163555c03773de ]--- [ 60.655704] RIP: 0010:coalesced_mmio_write+0x288/0x440 [ 60.660987] 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 [ 60.679945] RSP: 0018:ffff888098037100 EFLAGS: 00010a02 [ 60.685332] RAX: 00000000b52b40e6 RBX: 0000000000000f7c RCX: 1ffff112324540b3 [ 60.692609] RDX: dffffc0000000000 RSI: ffffffff8107bf9c RDI: ffff8891922a0598 [ 60.699902] RBP: ffff888098037150 R08: ffff888096b26400 R09: fffff52000bc9cd9 [ 60.707180] R10: fffff52000bc9cd8 R11: ffffc90005e4e6c3 R12: 0000000000000004 [ 60.714456] R13: ffff88809f217090 R14: 0000000000000004 R15: ffff8880961bf000 [ 60.721933] FS: 00007f9b29317700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 60.730265] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.736150] CR2: ffffed12324540b3 CR3: 00000000a0dc1000 CR4: 00000000001426e0 [ 60.743425] Kernel panic - not syncing: Fatal exception [ 60.749938] Kernel Offset: disabled [ 60.753785] Rebooting in 86400 seconds..