[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.024994] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.477825] random: sshd: uninitialized urandom read (32 bytes read) [ 20.832429] random: sshd: uninitialized urandom read (32 bytes read) [ 21.607829] random: sshd: uninitialized urandom read (32 bytes read) [ 21.742854] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.40' (ECDSA) to the list of known hosts. [ 27.325133] random: sshd: uninitialized urandom read (32 bytes read) [ 27.412606] kasan: CONFIG_KASAN_INLINE enabled [ 27.417201] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.424559] general protection fault: 0000 [#1] SMP KASAN [ 27.430077] CPU: 0 PID: 4466 Comm: syz-executor038 Not tainted 4.18.0-rc5-next-20180717+ #9 [ 27.438544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.447891] RIP: 0010:vmx_vcpu_run+0x131a/0x2600 [ 27.452629] Code: 00 00 10 89 de e8 16 57 5d 00 85 db 0f 84 91 00 00 00 e8 f9 55 5d 00 48 8b 54 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8c 10 00 00 48 8b 04 24 48 8b 98 40 57 00 00 48 [ 27.471754] RSP: 0018:ffff8801ace0f370 EFLAGS: 00010046 [ 27.477098] RAX: dffffc0000000000 RBX: 0000000010000000 RCX: ffffffff811f507a [ 27.484348] RDX: 0000000000000000 RSI: ffffffff811f5087 RDI: 0000000000000005 [ 27.491609] RBP: ffff880100000000 R08: ffff8801a7e566c0 R09: 0000000000000000 [ 27.498860] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.506109] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.513369] FS: 00000000022c8880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 27.521572] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.527433] CR2: 0000000000000000 CR3: 00000001ad6e5000 CR4: 00000000001426f0 [ 27.534696] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.541946] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.549195] Call Trace: [ 27.551781] ? trace_hardirqs_on+0x10/0x10 [ 27.556008] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.561532] ? vmx_handle_exit+0x2cf/0x17e0 [ 27.565844] ? trace_hardirqs_on+0x10/0x10 [ 27.570059] ? lock_acquire+0x1e4/0x540 [ 27.574013] ? __khugepaged_exit+0xa2/0x6a0 [ 27.578317] ? lock_release+0xa30/0xa30 [ 27.582278] ? exit_aio+0x425/0x560 [ 27.585908] ? kasan_check_write+0x14/0x20 [ 27.590121] ? do_raw_spin_lock+0xc1/0x200 [ 27.594348] ? _raw_spin_lock+0x32/0x40 [ 27.598301] ? __khugepaged_exit+0xa2/0x6a0 [ 27.602603] ? __khugepaged_exit+0xd2/0x6a0 [ 27.606915] ? uprobe_clear_state+0x25d/0x370 [ 27.611404] ? hugepage_madvise+0x100/0x100 [ 27.615708] ? check_same_owner+0x340/0x340 [ 27.620107] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.625624] ? rcu_note_context_switch+0x730/0x730 [ 27.630534] ? lock_release+0xa30/0xa30 [ 27.634491] ? mmput+0x4e9/0x620 [ 27.637847] ? lock_downgrade+0x871/0x8f0 [ 27.641976] ? set_mm_exe_file+0x200/0x200 [ 27.646197] ? kasan_check_read+0x11/0x20 [ 27.650325] ? do_raw_spin_unlock+0xa7/0x2f0 [ 27.654712] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 27.659275] ? kasan_check_write+0x14/0x20 [ 27.663498] ? do_raw_spin_lock+0xc1/0x200 [ 27.667711] ? do_exit+0xea9/0x2750 [ 27.671323] ? kick_process+0x110/0x110 [ 27.675288] ? mm_update_next_owner+0x9a0/0x9a0 [ 27.679946] ? vcpu_put+0x25/0x30 [ 27.683394] ? kvm_arch_vcpu_ioctl_run+0xac7/0x1690 [ 27.688392] ? kfree+0x15e/0x260 [ 27.691740] ? kvm_vcpu_ioctl+0x2ba/0x1300 [ 27.695962] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 27.701662] ? trace_hardirqs_on+0xd/0x10 [ 27.705793] ? lock_acquire+0x1e4/0x540 [ 27.709748] ? mntput_no_expire+0x160/0xbc0 [ 27.714050] ? lock_downgrade+0x8f0/0x8f0 [ 27.718177] ? lockref_put_or_lock+0x6f/0x90 [ 27.722567] ? lock_release+0xa30/0xa30 [ 27.726525] ? dput.part.26+0x248/0x7a0 [ 27.730482] ? lock_downgrade+0x8f0/0x8f0 [ 27.735218] ? kasan_check_read+0x11/0x20 [ 27.739348] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 27.743910] ? mntput_no_expire+0x18e/0xbc0 [ 27.748213] ? dput.part.26+0x276/0x7a0 [ 27.752169] ? blkcg_print_stat+0x12c0/0x12c0 [ 27.756644] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.762175] ? lock_acquire+0x1e4/0x540 [ 27.766127] ? task_work_run+0x1b3/0x2a0 [ 27.770169] ? lock_downgrade+0x8f0/0x8f0 [ 27.774300] ? kvm_uevent_notify_change.part.32+0x440/0x440 [ 27.779996] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.785521] ? do_vfs_ioctl+0x201/0x1720 [ 27.789561] ? do_raw_spin_unlock+0xa7/0x2f0 [ 27.793950] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 27.798513] ? ioctl_preallocate+0x300/0x300 [ 27.802899] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.808416] ? __fget_light+0x2f7/0x440 [ 27.812366] ? fget_raw+0x20/0x20 [ 27.815808] ? task_work_run+0x22f/0x2a0 [ 27.819849] ? task_work_cancel+0x250/0x250 [ 27.824152] ? do_group_exit+0x177/0x440 [ 27.828192] ? __ia32_sys_exit+0x50/0x50 [ 27.832235] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.837752] ? ksys_ioctl+0x81/0xd0 [ 27.841359] ? __x64_sys_exit_group+0x3e/0x50 [ 27.845833] ? do_syscall_64+0x1b9/0x820 [ 27.849875] ? syscall_return_slowpath+0x5e0/0x5e0 [ 27.855318] ? syscall_return_slowpath+0x31d/0x5e0 [ 27.860232] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 27.865236] ? prepare_exit_to_usermode+0x291/0x3b0 [ 27.870232] ? perf_trace_sys_enter+0xb10/0xb10 [ 27.874885] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.879712] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.885074] Modules linked in: [ 27.888258] Dumping ftrace buffer: [ 27.891775] (ftrace buffer empty) [ 27.895470] ---[ end trace fda2cd6a89667e44 ]--- [ 27.900205] RIP: 0010:vmx_vcpu_run+0x131a/0x2600 [ 27.904930] Code: 00 00 10 89 de e8 16 57 5d 00 85 db 0f 84 91 00 00 00 e8 f9 55 5d 00 48 8b 54 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8c 10 00 00 48 8b 04 24 48 8b 98 40 57 00 00 48 [ 27.924052] RSP: 0018:ffff8801ace0f370 EFLAGS: 00010046 [ 27.929486] RAX: dffffc0000000000 RBX: 0000000010000000 RCX: ffffffff811f507a [ 27.936739] RDX: 0000000000000000 RSI: ffffffff811f5087 RDI: 0000000000000005 [ 27.943985] RBP: ffff880100000000 R08: ffff8801a7e566c0 R09: 0000000000000000 [ 27.951232] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.958479] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.965729] FS: 00000000022c8880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 27.973932] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.979794] CR2: 0000000000000000 CR3: 00000001ad6e5000 CR4: 00000000001426f0 [ 27.987049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.994295] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.001545] Kernel panic - not syncing: Fatal exception [ 28.007349] Dumping ftrace buffer: [ 28.010872] (ftrace buffer empty) [ 28.014558] Kernel Offset: disabled [ 28.018161] Rebooting in 86400 seconds..