[....] Starting enhanced syslogd: rsyslogd[ 15.767929] audit: type=1400 audit(1521250220.479:5): avc: denied { syslog } for pid=4072 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 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: [ 17.947361] audit: type=1400 audit(1521250222.659:6): avc: denied { map } for pid=4209 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 '10.128.0.23' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 35.842822] audit: type=1400 audit(1521250240.554:7): avc: denied { map } for pid=4227 comm="syzkaller237480" path="/root/syzkaller237480630" 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 RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 36.232521] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 36.562302] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 36.568440] 8021q: adding VLAN 0 to HW filter on device bond0 executing program executing program executing program executing program executing program executing program executing program [ 36.603235] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 36.639434] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program executing program executing program executing program [ 36.710268] kasan: CONFIG_KASAN_INLINE enabled [ 36.714954] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.722313] general protection fault: 0000 [#1] SMP KASAN [ 36.727827] Dumping ftrace buffer: [ 36.731337] (ftrace buffer empty) [ 36.735018] Modules linked in: [ 36.738182] CPU: 1 PID: 4440 Comm: syzkaller237480 Not tainted 4.16.0-rc5+ #357 [ 36.745596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.754926] RIP: 0010:ucma_query_route+0x15e/0x1080 [ 36.759908] RSP: 0018:ffff8801d80d7910 EFLAGS: 00010202 [ 36.765238] RAX: dffffc0000000000 RBX: 1ffff1003b01af26 RCX: 0000000000000000 [ 36.772477] RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffff8801abde66f0 [ 36.779725] RBP: ffff8801d80d7ac0 R08: ffffed003b01af4b R09: ffff8801d80d7990 [ 36.786967] R10: 0000000000000000 R11: ffffed003b01af4a R12: ffff8801abde6680 [ 36.794209] R13: ffff8801d80d7990 R14: 0000000000000020 R15: 0000000000000000 [ 36.801449] FS: 00007f46621d5700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 36.809643] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.815493] CR2: 00007f46621b3e78 CR3: 00000001b17f1001 CR4: 00000000001606e0 [ 36.822738] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.829979] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.837224] Call Trace: [ 36.839793] ? ucma_leave_multicast+0x860/0x860 [ 36.844437] ? lock_downgrade+0x980/0x980 [ 36.848572] ucma_write+0x2d6/0x3d0 [ 36.852166] ? ucma_write+0x2d6/0x3d0 [ 36.855937] ? ucma_leave_multicast+0x860/0x860 [ 36.860573] ? ucma_resolve_route+0x1a0/0x1a0 [ 36.865040] ? ucma_resolve_route+0x1a0/0x1a0 [ 36.869504] __vfs_write+0xef/0x970 [ 36.873103] ? rcu_note_context_switch+0x710/0x710 [ 36.878002] ? kernel_read+0x120/0x120 [ 36.881861] ? __might_sleep+0x95/0x190 [ 36.885809] ? _cond_resched+0x14/0x30 [ 36.889668] ? __inode_security_revalidate+0xd9/0x130 [ 36.894837] ? avc_policy_seqno+0x9/0x20 [ 36.898867] ? selinux_file_permission+0x82/0x460 [ 36.903682] ? security_file_permission+0x89/0x1e0 [ 36.908582] ? rw_verify_area+0xe5/0x2b0 [ 36.912613] ? __fdget_raw+0x20/0x20 [ 36.916298] vfs_write+0x189/0x510 [ 36.919814] SyS_write+0xef/0x220 [ 36.923236] ? filp_open+0x70/0x70 [ 36.926745] ? SyS_read+0x220/0x220 [ 36.930341] ? do_syscall_64+0xb7/0x940 [ 36.934283] ? SyS_read+0x220/0x220 [ 36.937879] do_syscall_64+0x281/0x940 [ 36.941739] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.946209] ? finish_task_switch+0x1c1/0x7e0 [ 36.950678] ? syscall_return_slowpath+0x550/0x550 [ 36.955594] ? syscall_return_slowpath+0x2ac/0x550 [ 36.960494] ? prepare_exit_to_usermode+0x350/0x350 [ 36.965486] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 36.970820] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.975637] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 36.980796] RIP: 0033:0x446739 [ 36.983956] RSP: 002b:00007f46621d4da8 EFLAGS: 00000297 ORIG_RAX: 0000000000000001 [ 36.991634] RAX: ffffffffffffffda RBX: 00000000006dcc5c RCX: 0000000000446739 [ 36.998871] RDX: 00000000fffffdaa RSI: 0000000020000140 RDI: 0000000000000019 executing program [ 37.006122] RBP: 00000000006dcc58 R08: 0000000000000000 R09: 0000000000000000 [ 37.013362] R10: 0000000000000000 R11: 0000000000000297 R12: 006d635f616d6472 [ 37.020603] R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000006 [ 37.027851] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bb 0c 00 00 4d 8b 7c 24 70 48 b8 00 00 00 00 00 fc ff df 4d 8d 77 20 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 37.046925] RIP: ucma_query_route+0x15e/0x1080 RSP: ffff8801d80d7910 [ 37.053551] ---[ end trace 59e3543d89e6db35 ]--- [ 37.058303] Kernel panic - not syncing: Fatal exception [ 37.058672] Dumping ftrace buffer: [ 37.058675] (ftrace buffer empty) [ 37.058678] Kernel Offset: disabled [ 37.074786] Rebooting in 86400 seconds..