[....] Starting enhanced syslogd: rsyslogd[ 17.137191] audit: type=1400 audit(1518926395.266:5): avc: denied { syslog } for pid=4018 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: [ 23.041600] audit: type=1400 audit(1518926401.170:6): avc: denied { map } for pid=4157 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 '10.128.15.196' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 29.364882] audit: type=1400 audit(1518926407.493:7): avc: denied { map } for pid=4171 comm="syzkaller467091" path="/root/syzkaller467091201" 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: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 29.753449] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 30.094787] kasan: CONFIG_KASAN_INLINE enabled [ 30.099454] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.106978] general protection fault: 0000 [#1] SMP KASAN [ 30.112513] Dumping ftrace buffer: [ 30.116031] (ftrace buffer empty) [ 30.119715] Modules linked in: [ 30.122884] CPU: 0 PID: 4171 Comm: syzkaller467091 Not tainted 4.16.0-rc1+ #227 [ 30.130302] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.139651] RIP: 0010:ipt_do_table+0x12ee/0x1950 [ 30.144388] RSP: 0018:ffff8801ce1769b8 EFLAGS: 00010246 [ 30.149725] RAX: 0000000000000000 RBX: ffff8801db1a0248 RCX: ffffffff84b7913d [ 30.156975] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801db1a00da [ 30.164218] RBP: ffff8801ce176bc0 R08: 1ffff10039c2ed08 R09: 0000000000000000 [ 30.171543] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.178785] R13: dffffc0000000000 R14: ffff8801db1a0080 R15: ffff8801ce176b38 [ 30.186031] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000089d6840 [ 30.194228] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.200080] CR2: 000000002000cfa0 CR3: 00000001b1021004 CR4: 00000000001606f0 [ 30.207323] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.214571] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.221813] Call Trace: [ 30.224376] ? trace_hardirqs_on+0xd/0x10 [ 30.228497] ? __local_bh_enable_ip+0x121/0x230 [ 30.233138] ? ipt_do_table+0xe70/0x1950 [ 30.237171] ? noop_count+0x40/0x40 [ 30.240778] ? do_add_counters+0x550/0x550 [ 30.244985] ? do_add_counters+0x550/0x550 [ 30.249199] ? check_noncircular+0x20/0x20 [ 30.253414] ? ip_rcv+0xc9b/0x1840 [ 30.256931] iptable_mangle_hook+0xa7/0x4a0 [ 30.261228] nf_hook_slow+0xba/0x1a0 [ 30.264916] ip_rcv+0xedf/0x1840 [ 30.268258] ? ip_local_deliver+0x6e0/0x6e0 [ 30.272557] ? inet_del_offload+0x40/0x40 [ 30.276684] ? ip_local_deliver+0x6e0/0x6e0 [ 30.280978] __netif_receive_skb_core+0x1a41/0x3460 [ 30.285973] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.291137] ? nf_ingress+0x9f0/0x9f0 [ 30.294915] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.300077] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.305247] ? do_csum+0x288/0x360 [ 30.308762] ? check_noncircular+0x20/0x20 [ 30.312970] ? check_noncircular+0x20/0x20 [ 30.317174] ? skb_send_sock+0x50/0x50 [ 30.321035] ? __skb_checksum+0x4a9/0x7e0 [ 30.325155] ? mark_held_locks+0xaf/0x100 [ 30.329277] ? print_irqtrace_events+0x270/0x270 [ 30.334009] ? lock_downgrade+0x980/0x980 [ 30.338147] ? pvclock_read_flags+0x160/0x160 [ 30.342622] ? mark_held_locks+0xaf/0x100 [ 30.346741] ? lock_acquire+0x1d5/0x580 [ 30.350687] ? lock_acquire+0x1d5/0x580 [ 30.354631] ? netif_receive_skb_internal+0xa2/0x670 [ 30.359709] ? ktime_get_with_offset+0x2c1/0x420 [ 30.364441] ? lock_release+0xa40/0xa40 [ 30.368385] ? do_gettimeofday+0x190/0x190 [ 30.372590] ? lock_release+0xa40/0xa40 [ 30.376544] __netif_receive_skb+0x2c/0x1b0 [ 30.380835] ? __netif_receive_skb+0x2c/0x1b0 [ 30.385308] netif_receive_skb_internal+0x10b/0x670 [ 30.390315] ? dev_cpu_dead+0xb00/0xb00 [ 30.394260] ? net_rx_action+0x1910/0x1910 [ 30.398468] ? eth_type_trans+0x2b2/0x710 [ 30.402587] ? eth_gro_receive+0x820/0x820 [ 30.406797] napi_gro_frags+0x58a/0xaf0 [ 30.410743] ? napi_gro_receive+0x500/0x500 [ 30.415042] ? tun_get_user+0x2737/0x3940 [ 30.419161] tun_get_user+0x2760/0x3940 [ 30.423111] ? trace_hardirqs_off+0xd/0x10 [ 30.427324] ? tun_build_skb.isra.50+0x1850/0x1850 [ 30.432225] ? lock_downgrade+0x980/0x980 [ 30.436349] ? compat_ip_setsockopt+0x8b/0xd0 [ 30.440902] ? compat_sock_common_setsockopt+0xb2/0x140 [ 30.446236] ? compat_SyS_setsockopt+0x17c/0x410 [ 30.450974] ? find_held_lock+0x35/0x1d0 [ 30.455012] ? tun_get+0x1ab/0x2e0 [ 30.458530] ? lock_release+0xa40/0xa40 [ 30.462476] ? __lock_is_held+0xb6/0x140 [ 30.466512] ? tun_get+0x1d4/0x2e0 [ 30.470026] ? tun_do_read+0x26c0/0x26c0 [ 30.474065] ? rcu_note_context_switch+0x710/0x710 [ 30.478968] tun_chr_write_iter+0xbd/0x1c0 [ 30.483174] do_iter_readv_writev+0x55c/0x830 [ 30.487640] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 30.492389] ? rw_verify_area+0xe5/0x2b0 [ 30.496422] do_iter_write+0x154/0x540 [ 30.500282] ? iov_iter_get_pages+0x1150/0x1150 [ 30.504922] ? lock_release+0xa40/0xa40 [ 30.508872] compat_writev+0x225/0x420 [ 30.512732] ? __fget_light+0x2b2/0x3c0 [ 30.516680] ? do_pwritev+0x1a0/0x1a0 [ 30.520452] ? ns_capable_common+0xcf/0x160 [ 30.524753] ? __fdget_pos+0x130/0x190 [ 30.528624] ? __fdget_raw+0x20/0x20 [ 30.532314] ? compat_raw_setsockopt+0x90/0xd0 [ 30.536869] do_compat_writev+0x115/0x220 [ 30.540985] ? do_compat_writev+0x115/0x220 [ 30.545295] ? compat_writev+0x420/0x420 [ 30.549329] ? scm_detach_fds_compat+0x3c0/0x3c0 [ 30.554060] compat_SyS_writev+0x26/0x30 [ 30.558093] ? compat_SyS_preadv2+0x90/0x90 [ 30.562394] do_fast_syscall_32+0x3ec/0xf9f [ 30.566691] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.571247] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.575973] ? syscall_return_slowpath+0x550/0x550 [ 30.580874] ? syscall_return_slowpath+0x2ac/0x550 [ 30.585787] ? prepare_exit_to_usermode+0x350/0x350 [ 30.590779] ? sysret32_from_system_call+0x5/0x3c [ 30.595596] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.600414] entry_SYSENTER_compat+0x70/0x7f [ 30.604794] RIP: 0023:0xf7fc3c79 [ 30.608130] RSP: 002b:00000000ffdbee98 EFLAGS: 00000246 ORIG_RAX: 0000000000000092 [ 30.615807] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000ffdbeed4 [ 30.623047] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 [ 30.630288] RBP: 00000000004c5454 R08: 0000000000000000 R09: 0000000000000000 [ 30.637536] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.644787] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.652044] Code: 46 52 02 75 41 e8 93 7a b9 fc 8b 85 80 fe ff ff 8d 70 01 89 b5 00 ff ff ff 48 8b b5 88 fe ff ff 4c 8d 24 c6 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 e8 01 00 00 8b 85 00 ff ff ff 4d 89 34 24 [ 30.671115] RIP: ipt_do_table+0x12ee/0x1950 RSP: ffff8801ce1769b8 [ 30.677355] ---[ end trace 9cf3f7ff26001d56 ]--- [ 30.682112] Kernel panic - not syncing: Fatal exception in interrupt [ 30.688637] Dumping ftrace buffer: [ 30.692157] (ftrace buffer empty) [ 30.695837] Kernel Offset: disabled [ 30.699433] Rebooting in 86400 seconds..