[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.995933] random: sshd: uninitialized urandom read (32 bytes read) [ 34.322366] kauditd_printk_skb: 9 callbacks suppressed [ 34.322374] audit: type=1400 audit(1561796225.711:35): avc: denied { map } for pid=6886 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 [ 34.378465] random: sshd: uninitialized urandom read (32 bytes read) [ 34.915247] random: sshd: uninitialized urandom read (32 bytes read) [ 44.977635] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. [ 50.536090] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 50.656998] audit: type=1400 audit(1561796242.041:36): avc: denied { map } for pid=6899 comm="syz-executor568" path="/root/syz-executor568545180" 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 [ 50.664513] 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. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.825034] BUG: unable to handle kernel paging request at ffffed12349096b3 [ 56.825961] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.832193] IP: coalesced_mmio_write+0x240/0x440 [ 56.832198] PGD 21ffef067 P4D 21ffef067 PUD 0 [ 56.832210] Oops: 0000 [#1] PREEMPT SMP KASAN [ 56.832216] Modules linked in: [ 56.832225] CPU: 0 PID: 7700 Comm: syz-executor568 Not tainted 4.14.131 #25 [ 56.832229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program [ 56.832232] task: ffff88808ee84380 task.stack: ffff8880953e0000 [ 56.832237] RIP: 0010:coalesced_mmio_write+0x240/0x440 [ 56.832241] RSP: 0018:ffff8880953e7428 EFLAGS: 00010a02 [ 56.832247] RAX: 00000000b52b40e6 RBX: 0000000000000000 RCX: ffff8880a876a000 [ 56.832250] RDX: dffffc0000000000 RSI: 1ffff112349096b3 RDI: ffff8891a484b598 [ 56.832254] RBP: ffff8880953e7478 R08: 0000000000000007 R09: 0000000000000000 [ 56.832258] R10: ffff88808ee84c50 R11: ffff88808ee84380 R12: ffff88809f2e1a90 [ 56.832262] R13: 0000000000000001 R14: ffff88809255bca0 R15: 0000000000000001 executing program [ 56.832267] FS: 00007f8410fb6700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 56.832271] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.832274] CR2: ffffed12349096b3 CR3: 0000000088d63000 CR4: 00000000001426f0 [ 56.832281] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.846304] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.847832] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.847835] Call Trace: executing program [ 56.847852] __kvm_io_bus_write+0x241/0x340 [ 56.847860] ? coalesced_mmio_destructor+0x160/0x160 [ 56.852518] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 56.855606] kvm_io_bus_write+0x115/0x200 [ 56.855614] ? kvm_vcpu_check_block+0xa0/0xa0 [ 56.855621] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 56.855630] write_mmio+0x148/0x480 [ 56.863116] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 56.872059] emulator_read_write_onepage+0x36a/0xbb0 executing program [ 56.872069] emulator_read_write+0x174/0x540 [ 56.872077] emulator_write_emulated+0x3c/0x50 [ 56.872085] segmented_write+0xd3/0x120 [ 56.872092] ? em_fxsave+0x40/0x40 [ 56.892841] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.896146] writeback+0x425/0x760 [ 56.896155] ? __emulate_int_real+0x660/0x660 [ 56.896164] ? x86_decode_insn+0xbc5/0x4ea0 [ 56.905734] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.910707] ? fastop+0x17a/0x290 [ 56.910726] ? em_salc+0x8/0x8 [ 56.910737] x86_emulate_insn+0x15f2/0x4120 [ 56.910745] ? init_decode_cache+0xc0/0xc0 [ 56.910752] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 56.910763] x86_emulate_instruction+0x423/0x1700 [ 56.918441] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 56.925298] ? __lock_is_held+0xb6/0x140 [ 56.925310] ? reexecute_instruction.part.0+0x260/0x260 [ 56.925318] ? mmio_info_in_cache+0x118/0x440 [ 56.925324] kvm_mmu_page_fault+0x1c5/0x300 [ 56.925334] handle_ept_violation+0x149/0x420 [ 56.925342] ? handle_pause+0x410/0x410 [ 56.933686] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 56.939513] vmx_handle_exit+0x20d/0x12a0 [ 56.939519] ? vcpu_enter_guest+0xccd/0x5220 [ 56.939528] vcpu_enter_guest+0xec8/0x5220 [ 56.939535] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.939545] ? emulator_read_emulated+0x50/0x50 [ 56.962373] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.968012] ? kvm_check_async_pf_completion+0x2a9/0x410 [ 56.968024] kvm_arch_vcpu_ioctl_run+0x318/0x1000 [ 56.968032] ? kvm_arch_vcpu_ioctl_run+0x318/0x1000 [ 56.977151] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 56.979519] kvm_vcpu_ioctl+0x401/0xd10 [ 56.979527] ? kvm_vcpu_block+0xbb0/0xbb0 [ 56.979537] ? trace_hardirqs_on+0x10/0x10 [ 56.984979] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 56.993700] ? save_trace+0x290/0x290 [ 56.993710] ? exit_robust_list+0x230/0x230 [ 56.993716] ? lock_downgrade+0x6e0/0x6e0 [ 56.993723] ? __fget+0x210/0x370 [ 56.993729] ? find_held_lock+0x35/0x130 [ 56.993733] ? __fget+0x210/0x370 [ 56.993742] ? kvm_vcpu_block+0xbb0/0xbb0 [ 56.997967] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 57.002345] do_vfs_ioctl+0x7ae/0x1060 [ 57.002356] ? selinux_file_mprotect+0x5d0/0x5d0 [ 57.002362] ? lock_downgrade+0x6e0/0x6e0 [ 57.002368] ? ioctl_preallocate+0x1c0/0x1c0 [ 57.002374] ? __fget+0x237/0x370 [ 57.002384] ? security_file_ioctl+0x7d/0xb0 [ 57.023946] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 57.025643] ? security_file_ioctl+0x89/0xb0 [ 57.025654] SyS_ioctl+0x8f/0xc0 [ 57.025659] ? do_vfs_ioctl+0x1060/0x1060 [ 57.025669] do_syscall_64+0x1e8/0x640 [ 57.031242] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 57.034747] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.034757] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 57.034765] RIP: 0033:0x449e09 [ 57.038800] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 57.042252] RSP: 002b:00007f8410fb5ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 57.042260] RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 0000000000449e09 [ 57.042264] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 57.042268] RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000 [ 57.042272] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c [ 57.042276] R13: 00007ffc5676cc3f R14: 00007f8410fb69c0 R15: 0000000000000000 [ 57.042282] Code: c0 03 38 d0 7c 08 84 d2 0f [ 57.048995] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 57.052052] 85 00 02 00 00 8b 41 04 48 8d 14 40 48 8d 7c d1 08 48 ba 00 00 00 00 00 fc ff [ 57.072015] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 57.073890] df 48 89 fe 48 c1 ee 03 <80> 3c 16 00 0f 85 [ 57.080399] kobject: 'kvm' (ffff8880a6e2e410): kobject_uevent_env [ 57.082634] bf 01 00 00 48 8d 14 40 48 be 00 00 00 00 [ 57.088228] kobject: 'kvm' (ffff8880a6e2e410): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 57.092952] 00 [ 57.092966] RIP: coalesced_mmio_write+0x240/0x440 RSP: ffff8880953e7428 [ 57.092969] CR2: ffffed12349096b3 [ 57.092981] ---[ end trace e80d0a03e4f478ca ]--- [ 57.092985] Kernel panic - not syncing: Fatal exception [ 57.094489] Kernel Offset: disabled [ 57.465573] Rebooting in 86400 seconds..