[....] Starting enhanced syslogd: rsyslogd[ 13.696058] audit: type=1400 audit(1546745582.554:4): avc: denied { syslog } for pid=1918 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 Warning: Permanently added '10.128.0.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.460395] audit: type=1400 audit(1546745603.314:5): avc: denied { create } for pid=2070 comm="syz-executor601" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 34.484961] audit: type=1400 audit(1546745603.344:6): avc: denied { write } for pid=2070 comm="syz-executor601" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 34.514685] kasan: CONFIG_KASAN_INLINE enabled [ 34.519083] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.532350] Modules linked in: [ 34.535637] CPU: 0 PID: 2070 Comm: syz-executor601 Not tainted 4.4.169+ #2 [ 34.542623] task: ffff8800b8134740 task.stack: ffff8801d40d8000 [ 34.548680] RIP: 0010:[] [] netlink_unicast+0x1cb/0x700 [ 34.557353] RSP: 0018:ffff8801d40df738 EFLAGS: 00010293 [ 34.562784] RAX: dffffc0000000048 RBX: 0000000000000000 RCX: 0000000000000030 [ 34.570027] RDX: 0000000000000000 RSI: ffffffff822ebb04 RDI: ffff8800b72b5218 [ 34.577274] RBP: ffff8801d40df7f0 R08: 1ffff10016f06d92 R09: ffffed0016f06d97 [ 34.584519] R10: ffffed0016f06d96 R11: ffff8800b7836cb7 R12: dffffc0000000000 [ 34.591778] R13: dffffc0000000000 R14: ffff8800b72b5140 R15: 0000000000000816 [ 34.599022] FS: 0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:0000000008c70840 [ 34.607222] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.613080] CR2: 000056274f83fa98 CR3: 00000000b7273000 CR4: 00000000001606b0 [ 34.620326] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.627572] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.634814] Stack: [ 34.636940] ffff8800b7836d40 0000000000000030 0000000000000240 1ffff1003a81beed [ 34.644964] dffffc0000000006 dffffc0000000048 0000000041b58ab3 ffffffff82c9ea90 [ 34.652977] ffffffff822eb940 ffffffff821f4e2c 0000000000000000 ffff8800b7836c80 [ 34.660980] Call Trace: [ 34.663546] [] ? netlink_sendskb+0x60/0x60 [ 34.669405] [] ? skb_put+0x12c/0x170 [ 34.674743] [] netlink_ack+0x236/0x4c0 [ 34.680253] [] nfnetlink_rcv+0xbdd/0x12b0 [ 34.686041] [] netlink_unicast+0x4d7/0x700 [ 34.691902] [] ? netlink_sendskb+0x60/0x60 [ 34.697772] [] netlink_sendmsg+0x6b6/0xc80 [ 34.697779] [] ? nlmsg_notify+0x170/0x170 [ 34.697790] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 34.697801] [] ? security_socket_sendmsg+0x8f/0xc0 [ 34.697806] [] ? nlmsg_notify+0x170/0x170 [ 34.697814] [] sock_sendmsg+0xbe/0x110 [ 34.697821] [] ___sys_sendmsg+0x769/0x890 [ 34.697830] [] ? __alloc_pages_nodemask+0x3fb/0x14b0 [ 34.697837] [] ? copy_msghdr_from_user+0x550/0x550 [ 34.697846] [] ? trace_hardirqs_on+0x10/0x10 [ 34.697854] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 34.697862] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 34.697869] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 34.697879] [] ? check_preemption_disabled+0x3c/0x200 [ 34.697887] [] ? check_preemption_disabled+0x3c/0x200 [ 34.697895] [] ? handle_mm_fault+0xc10/0x3140 [ 34.697902] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 34.697910] [] ? __fget_light+0xa3/0x1f0 [ 34.697917] [] ? __fdget+0x1b/0x20 [ 34.697969] [] ? sockfd_lookup_light+0xb4/0x160 [ 34.697978] [] __sys_sendmsg+0xc5/0x160 [ 34.697985] [] ? SyS_shutdown+0x1a0/0x1a0 [ 34.698010] [] ? __do_page_fault+0x2b3/0x7f0 [ 34.698018] [] compat_SyS_sendmsg+0x2a/0x40 [ 34.698024] [] ? compat_SyS_getsockopt+0x540/0x540 [ 34.698050] [] do_fast_syscall_32+0x32d/0xa90 [ 34.698059] [] sysenter_flags_fixed+0xd/0x1a [ 34.698168] Code: 1c d9 01 ff 48 8d 55 98 48 89 d9 4c 89 f6 4c 89 e7 e8 fa f6 ff ff 83 f8 01 0f 85 e6 03 00 00 e8 fc d8 01 ff 48 8b 85 70 ff ff ff <0f> b6 00 84 c0 74 08 3c 03 0f 8e 16 04 00 00 48 8b 85 68 ff ff [ 34.698176] RIP [] netlink_unicast+0x1cb/0x700 [ 34.698179] RSP [ 34.720245] ---[ end trace 48856fe1e6ed352e ]--- [ 34.720249] Kernel panic - not syncing: Fatal exception [ 34.723101] Kernel Offset: disabled [ 34.908096] Rebooting in 86400 seconds..