[....] Starting enhanced syslogd: rsyslogd[ 16.955309] audit: type=1400 audit(1517934107.534:5): avc: denied { syslog } for pid=4006 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: [ 22.702399] audit: type=1400 audit(1517934113.281:6): avc: denied { map } for pid=4148 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 '10.128.15.202' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 81.274030] audit: type=1400 audit(1517934171.852:7): avc: denied { map } for pid=4164 comm="syzkaller664626" path="/root/syzkaller664626864" 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 RTNETLINK answers: Operation not supported [ 81.541197] 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 executing program executing program [ 81.844089] kasan: CONFIG_KASAN_INLINE enabled [ 81.848784] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 81.856144] general protection fault: 0000 [#1] SMP KASAN [ 81.861651] Dumping ftrace buffer: [ 81.865158] (ftrace buffer empty) [ 81.868930] Modules linked in: [ 81.872097] CPU: 0 PID: 4164 Comm: syzkaller664626 Not tainted 4.15.0+ #299 [ 81.879162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.888504] RIP: 0010:ip6t_do_table+0x132d/0x1a30 [ 81.893320] RSP: 0018:ffff8801b362e6c8 EFLAGS: 00010246 [ 81.898651] RAX: 0000000000000000 RBX: ffff8801db1ce040 RCX: ffffffff84db92e1 [ 81.905890] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801db1ce19e [ 81.913140] RBP: ffff8801b362e910 R08: 1ffff100366c5ca2 R09: 0000000000000000 [ 81.920389] R10: 00000000000000d0 R11: 0000000000000000 R12: 0000000000000001 [ 81.927629] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801db1ce110 [ 81.934875] FS: 0000000001ca3880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 81.943068] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.948920] CR2: 0000000020000000 CR3: 00000001b3eb1004 CR4: 00000000001606f0 [ 81.956162] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.963402] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.970649] Call Trace: [ 81.973211] ? ip6t_error+0x60/0x60 [ 81.976811] ? print_irqtrace_events+0x270/0x270 [ 81.981538] ? mark_held_locks+0xaf/0x100 [ 81.985655] ? get_page_from_freelist+0xa83/0x52f0 [ 81.990561] ? ip6t_error+0x60/0x60 [ 81.994155] ? ip6table_mangle_hook+0x117/0x920 [ 81.998794] ? check_noncircular+0x20/0x20 [ 82.002998] ? lock_acquire+0x1d5/0x580 [ 82.006940] ? ip6table_mangle_net_exit+0xa0/0xa0 [ 82.011753] ? lock_release+0xa40/0xa40 [ 82.015700] ip6table_security_hook+0x65/0x80 [ 82.020167] nf_hook_slow+0xba/0x1a0 [ 82.023854] ip6_input+0x35c/0x560 [ 82.027725] ? ip6_input_finish+0x17a0/0x17a0 [ 82.032199] ? ipv6_chk_mcast_addr+0x2f2/0x810 [ 82.036759] ? ip6table_nat_fn+0x40/0x40 [ 82.040794] ? ip6_make_skb+0x5e0/0x5e0 [ 82.044753] ip6_mc_input+0x3a8/0xb10 [ 82.048539] ? ipv6_rcv+0x1fa0/0x1fa0 [ 82.052315] ip6_rcv_finish+0x297/0x8c0 [ 82.056259] ? ip6_input+0x560/0x560 [ 82.060029] ? ip6table_nat_in+0x2c/0x40 [ 82.064058] ? tcp_v6_mtu_reduced+0x60/0x60 [ 82.068348] ? nf_hook_slow+0xd3/0x1a0 [ 82.072206] ipv6_rcv+0xf37/0x1fa0 [ 82.075725] ? ip6_rcv_finish+0x8c0/0x8c0 [ 82.079844] ? mem_cgroup_uncharge+0xe0/0xe0 [ 82.084226] ? __lock_acquire+0x664/0x3e00 [ 82.088435] ? ip6_input+0x560/0x560 [ 82.092119] ? ip6_rcv_finish+0x8c0/0x8c0 [ 82.096238] __netif_receive_skb_core+0x1a41/0x3460 [ 82.101224] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 82.106398] ? nf_ingress+0x9f0/0x9f0 [ 82.110175] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 82.115337] ? do_csum+0x288/0x360 [ 82.118852] ? check_noncircular+0x20/0x20 [ 82.123061] ? csum_partial+0x21/0x30 [ 82.126832] ? csum_partial_ext+0x25/0x30 [ 82.130959] ? check_noncircular+0x20/0x20 [ 82.135161] ? __skb_checksum+0x4a9/0x7e0 [ 82.139281] ? kernel_text_address+0x102/0x140 [ 82.143832] ? find_held_lock+0x35/0x1d0 [ 82.147875] ? print_irqtrace_events+0x270/0x270 [ 82.152603] ? lock_downgrade+0x980/0x980 [ 82.156726] ? pvclock_read_flags+0x160/0x160 [ 82.161193] ? mark_held_locks+0xaf/0x100 [ 82.165312] ? lock_acquire+0x1d5/0x580 [ 82.169256] ? lock_acquire+0x1d5/0x580 [ 82.173199] ? netif_receive_skb_internal+0xa2/0x670 [ 82.178273] ? ktime_get_with_offset+0x2c1/0x420 [ 82.183000] ? lock_release+0xa40/0xa40 [ 82.186943] ? do_gettimeofday+0x190/0x190 [ 82.191147] ? lock_release+0xa40/0xa40 [ 82.195093] __netif_receive_skb+0x2c/0x1b0 [ 82.199385] ? __netif_receive_skb+0x2c/0x1b0 [ 82.203853] netif_receive_skb_internal+0x10b/0x670 [ 82.208843] ? dev_cpu_dead+0xb00/0xb00 [ 82.212787] ? net_rx_action+0x1910/0x1910 [ 82.216990] ? eth_type_trans+0x2b2/0x710 [ 82.221105] ? eth_gro_receive+0x820/0x820 [ 82.225312] napi_gro_frags+0x58a/0xaf0 [ 82.229257] ? napi_gro_receive+0x500/0x500 [ 82.233552] ? tun_get_user+0x2737/0x3940 [ 82.237673] tun_get_user+0x2760/0x3940 [ 82.241615] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 82.246773] ? do_huge_pmd_anonymous_page+0x1539/0x1b00 [ 82.252114] ? tun_build_skb.isra.50+0x1810/0x1810 [ 82.257016] ? _raw_spin_unlock+0x22/0x30 [ 82.261136] ? do_huge_pmd_anonymous_page+0xb1e/0x1b00 [ 82.266386] ? find_held_lock+0x35/0x1d0 [ 82.270506] ? tun_get+0x1ab/0x2e0 [ 82.274018] ? lock_release+0xa40/0xa40 [ 82.277964] ? __lock_is_held+0xb6/0x140 [ 82.281999] ? tun_get+0x1d4/0x2e0 [ 82.285509] ? tun_do_read+0x26c0/0x26c0 [ 82.289539] ? __check_object_size+0x8b/0x530 [ 82.294004] ? rcu_note_context_switch+0x710/0x710 [ 82.298912] tun_chr_write_iter+0xb9/0x160 [ 82.303119] do_iter_readv_writev+0x55c/0x830 [ 82.307585] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 82.312327] ? rw_verify_area+0xe5/0x2b0 [ 82.316369] do_iter_write+0x154/0x540 [ 82.320228] ? dup_iter+0x260/0x260 [ 82.323828] vfs_writev+0x18a/0x340 [ 82.327425] ? vfs_iter_write+0xb0/0xb0 [ 82.331378] ? __fdget_pos+0x130/0x190 [ 82.335234] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 82.339786] ? __fdget_raw+0x20/0x20 [ 82.343479] do_writev+0xfc/0x2a0 [ 82.346905] ? do_writev+0xfc/0x2a0 [ 82.350502] ? vfs_writev+0x340/0x340 [ 82.354270] ? mm_fault_error+0x2c0/0x2c0 [ 82.358389] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 82.363896] SyS_writev+0x27/0x30 [ 82.367319] ? SyS_readv+0x30/0x30 [ 82.370831] do_syscall_64+0x282/0x940 [ 82.374686] ? __do_page_fault+0xc90/0xc90 [ 82.378899] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 82.383624] ? syscall_return_slowpath+0x550/0x550 [ 82.388525] ? syscall_return_slowpath+0x2ac/0x550 [ 82.393425] ? prepare_exit_to_usermode+0x350/0x350 [ 82.398421] ? retint_user+0x18/0x18 [ 82.402106] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 82.406933] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 82.412092] RIP: 0033:0x4463b0 [ 82.415260] RSP: 002b:00007ffc294a0c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 82.423023] RAX: ffffffffffffffda RBX: 0000000000000046 RCX: 00000000004463b0 [ 82.430263] RDX: 0000000000000001 RSI: 00007ffc294a0c40 RDI: 0000000000000003 [ 82.437502] RBP: 00007ffc294a0d38 R08: 000000000000000f R09: 0000000000000000 [ 82.445175] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc294a0d38 [ 82.452415] R13: 0000000000403940 R14: 0000000000000000 R15: 0000000000000000 [ 82.459663] Code: 41 f6 87 83 00 00 00 04 75 37 e8 cf 13 95 fc 8b 85 14 fe ff ff 48 8b b5 50 fe ff ff 4c 8d 2c c6 44 8d 60 01 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 26 03 00 00 4d 89 7d 00 44 89 a5 14 fe ff [ 82.478736] RIP: ip6t_do_table+0x132d/0x1a30 RSP: ffff8801b362e6c8 [ 82.485068] ---[ end trace ff873efa820dad1b ]--- [ 82.489803] Kernel panic - not syncing: Fatal exception in interrupt [ 82.496586] Dumping ftrace buffer: [ 82.500094] (ftrace buffer empty) [ 82.503778] Kernel Offset: disabled [ 82.507378] Rebooting in 86400 seconds..