[....] Starting enhanced syslogd: rsyslogd[ 15.400171] audit: type=1400 audit(1521377057.354:5): avc: denied { syslog } for pid=4071 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.063012] audit: type=1400 audit(1521377060.016:6): avc: denied { map } for pid=4210 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 '10.128.0.48' (ECDSA) to the list of known hosts. executing program [ 35.912387] audit: type=1400 audit(1521377077.866:7): avc: denied { map } for pid=4228 comm="syzkaller050160" path="/root/syzkaller050160487" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 35.918516] ------------[ cut here ]------------ [ 35.943043] kernel BUG at drivers/vhost/vhost.c:1655! [ 35.948327] invalid opcode: 0000 [#1] SMP KASAN [ 35.952967] Dumping ftrace buffer: [ 35.956472] (ftrace buffer empty) [ 35.960152] Modules linked in: [ 35.963316] CPU: 1 PID: 4228 Comm: syzkaller050160 Not tainted 4.16.0-rc5+ #357 [ 35.970729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.980057] RIP: 0010:log_write+0x3ca/0x490 [ 35.984344] RSP: 0018:ffff8801b0fa77b0 EFLAGS: 00010293 [ 35.989677] RAX: ffff8801af534240 RBX: dffffc0000000000 RCX: ffffffff8443f50a [ 35.996918] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801af535618 [ 36.004155] RBP: ffff8801b0fa78f0 R08: 0000000000000040 R09: 0000000000000001 [ 36.011392] R10: ffff8801b0fa76d0 R11: 0000000000000002 R12: 0001ffffffffffff [ 36.018632] R13: ffffed00361f4f09 R14: ffff8801b0fa78c8 R15: ffff8801b0fa7848 [ 36.025871] FS: 00000000007df880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 36.034065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.039915] CR2: 0000000020d7c000 CR3: 00000001d3e5b005 CR4: 00000000001606e0 [ 36.047156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.054393] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.061631] Call Trace: [ 36.064192] ? copy_overflow+0x30/0x30 [ 36.068047] ? translate_desc+0x2bd/0x590 [ 36.072170] vhost_update_used_flags+0x379/0x480 [ 36.076895] vhost_vq_init_access+0xca/0x540 [ 36.081276] vhost_net_ioctl+0xee0/0x1920 [ 36.085397] ? vhost_net_stop_vq+0xf0/0xf0 [ 36.089603] ? avc_ss_reset+0x110/0x110 [ 36.093547] ? __handle_mm_fault+0x5ba/0x38c0 [ 36.098012] ? __pmd_alloc+0x4e0/0x4e0 [ 36.101869] ? trace_hardirqs_off+0x10/0x10 [ 36.106161] ? __fd_install+0x25f/0x740 [ 36.110106] ? find_held_lock+0x35/0x1d0 [ 36.114145] ? check_same_owner+0x320/0x320 [ 36.118438] ? rcu_note_context_switch+0x710/0x710 [ 36.123334] ? __do_page_fault+0x5f7/0xc90 [ 36.127540] ? vhost_net_stop_vq+0xf0/0xf0 [ 36.131742] do_vfs_ioctl+0x1b1/0x1520 [ 36.135601] ? ioctl_preallocate+0x2b0/0x2b0 [ 36.139979] ? selinux_capable+0x40/0x40 [ 36.144009] ? up_read+0x1a/0x40 [ 36.147349] ? security_file_ioctl+0x7d/0xb0 [ 36.151727] ? security_file_ioctl+0x89/0xb0 [ 36.156104] SyS_ioctl+0x8f/0xc0 [ 36.159436] ? do_vfs_ioctl+0x1520/0x1520 [ 36.163557] do_syscall_64+0x281/0x940 [ 36.167412] ? __do_page_fault+0xc90/0xc90 [ 36.171615] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.176338] ? syscall_return_slowpath+0x550/0x550 [ 36.181233] ? syscall_return_slowpath+0x2ac/0x550 [ 36.186128] ? prepare_exit_to_usermode+0x350/0x350 [ 36.191113] ? retint_user+0x18/0x18 [ 36.194799] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.199613] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 36.204772] RIP: 0033:0x43ff09 [ 36.207934] RSP: 002b:00007ffe94d57fc8 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 36.215608] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff09 [ 36.222847] RDX: 0000000020d7c000 RSI: 000000004008af30 RDI: 0000000000000003 [ 36.230085] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 36.237324] R10: 00000000004002c8 R11: 0000000000000207 R12: 0000000000401830 [ 36.244563] R13: 00000000004018c0 R14: 0000000000000000 R15: 0000000000000000 [ 36.251810] Code: 5e 41 5f 5d c3 31 c0 eb a6 e8 b3 22 2d fd 4c 89 ef e8 5b bb 4d fd 4c 89 f8 48 c1 e8 03 c6 04 18 f8 e9 3a ff ff ff e8 96 22 2d fd <0f> 0b e8 8f 22 2d fd 4d 8d 6c 24 ff e9 89 fe ff ff e8 80 22 2d [ 36.270877] RIP: log_write+0x3ca/0x490 RSP: ffff8801b0fa77b0 [ 36.276691] ---[ end trace 867ce9e35847b153 ]--- [ 36.281425] Kernel panic - not syncing: Fatal exception [ 36.287129] Dumping ftrace buffer: [ 36.290635] (ftrace buffer empty) [ 36.294312] Kernel Offset: disabled [ 36.297909] Rebooting in 86400 seconds..