[....] Starting enhanced syslogd: rsyslogd[ 16.100859] audit: type=1400 audit(1519188149.382:5): avc: denied { syslog } for pid=4002 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: [ 18.304713] audit: type=1400 audit(1519188151.586:6): avc: denied { map } for pid=4141 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 '10.128.0.12' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 41.478427] audit: type=1400 audit(1519188174.760:7): avc: denied { map } for pid=4159 comm="syzkaller520126" path="/root/syzkaller520126823" 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 [ 41.547089] ip (4180) used greatest stack depth: 16256 bytes left RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 41.737558] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.037451] xt_connbytes: Forcing CT accounting to be enabled [ 42.062121] kasan: CONFIG_KASAN_INLINE enabled [ 42.066784] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.074153] general protection fault: 0000 [#1] SMP KASAN [ 42.079670] Dumping ftrace buffer: [ 42.083182] (ftrace buffer empty) [ 42.086862] Modules linked in: [ 42.090028] CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.16.0-rc2+ #323 [ 42.096921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.106256] Workqueue: ipv6_addrconf addrconf_dad_work [ 42.111507] RIP: 0010:ip6t_do_table+0x132d/0x1a30 [ 42.116318] RSP: 0018:ffff8801d9856d48 EFLAGS: 00010246 [ 42.121650] RAX: 0000000000000000 RBX: ffff8801b3b26f60 RCX: ffffffff84dc31c1 [ 42.129389] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801b3b26e4e [ 42.136632] RBP: ffff8801d9856f90 R08: 0000000000000000 R09: 0000000000000001 [ 42.143874] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 42.151115] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801b3b26dc0 [ 42.158358] FS: 0000000000000000(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 42.166554] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.172413] CR2: 000000002037c000 CR3: 0000000006a22006 CR4: 00000000001606e0 [ 42.179656] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.186898] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.194140] Call Trace: [ 42.196701] ? ip6t_error+0x60/0x60 [ 42.200305] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.205473] ? ip6t_error+0x60/0x60 [ 42.209069] ? ip6table_mangle_hook+0x117/0x920 [ 42.213710] ? ip6table_mangle_net_exit+0xa0/0xa0 [ 42.218522] ? find_held_lock+0x35/0x1d0 [ 42.222554] ? ip6table_nat_fn+0x40/0x40 [ 42.226589] ip6table_filter_hook+0x65/0x80 [ 42.230885] nf_hook_slow+0xba/0x1a0 [ 42.234571] nf_hook.constprop.27+0x3f6/0x830 [ 42.239041] ? pndisc_destructor+0x340/0x340 [ 42.243420] ? find_held_lock+0x35/0x1d0 [ 42.247452] ? lock_acquire+0x1d5/0x580 [ 42.251394] ? lock_acquire+0x1d5/0x580 [ 42.255337] ? ndisc_send_skb+0x826/0x1370 [ 42.259540] ? lock_downgrade+0x980/0x980 [ 42.263659] ? lock_release+0xa40/0xa40 [ 42.267607] ? ndisc_error_report+0x180/0x180 [ 42.272075] ndisc_send_skb+0xa51/0x1370 [ 42.276110] ? nf_hook.constprop.27+0x830/0x830 [ 42.280746] ? check_noncircular+0x20/0x20 [ 42.284955] ? refcount_add_not_zero+0x133/0x200 [ 42.289684] ? refcount_dec_if_one+0x20/0x20 [ 42.294064] ? print_irqtrace_events+0x270/0x270 [ 42.298798] ndisc_send_ns+0x38a/0x870 [ 42.302658] ? ndisc_netdev_event+0x4a0/0x4a0 [ 42.307124] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.312113] ? addrconf_dad_work+0xa5e/0x1320 [ 42.316584] addrconf_dad_work+0xb9e/0x1320 [ 42.320876] ? addrconf_dad_work+0xb9e/0x1320 [ 42.325342] ? addrconf_ifdown+0x14f0/0x14f0 [ 42.329722] ? __lock_is_held+0xb6/0x140 [ 42.333763] process_one_work+0xbbf/0x1af0 [ 42.337970] ? process_one_work+0xbbf/0x1af0 [ 42.342357] ? pwq_dec_nr_in_flight+0x450/0x450 [ 42.347000] ? __schedule+0x90d/0x2070 [ 42.350862] ? __lock_acquire+0x664/0x3e00 [ 42.355070] ? check_noncircular+0x20/0x20 [ 42.359279] ? check_noncircular+0x20/0x20 [ 42.363490] ? lock_acquire+0x1d5/0x580 [ 42.367435] ? lock_acquire+0x1d5/0x580 [ 42.371380] ? worker_thread+0x4a3/0x1990 [ 42.375496] ? lock_downgrade+0x980/0x980 [ 42.379616] ? lock_release+0xa40/0xa40 [ 42.383562] ? retint_kernel+0x10/0x10 [ 42.387420] ? do_raw_spin_trylock+0x190/0x190 [ 42.391977] worker_thread+0x223/0x1990 [ 42.395920] ? finish_task_switch+0x1c0/0x860 [ 42.400394] ? process_one_work+0x1af0/0x1af0 [ 42.404872] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.409863] ? trace_hardirqs_on+0xd/0x10 [ 42.413983] ? mmdrop+0x18/0x30 [ 42.417236] ? finish_task_switch+0x279/0x860 [ 42.421705] ? copy_overflow+0x20/0x20 [ 42.425574] ? __schedule+0x90d/0x2070 [ 42.429440] ? check_noncircular+0x20/0x20 [ 42.433683] ? find_held_lock+0x35/0x1d0 [ 42.437721] ? find_held_lock+0x35/0x1d0 [ 42.441757] ? find_held_lock+0x35/0x1d0 [ 42.445794] ? complete+0x62/0x80 [ 42.449221] ? __schedule+0x2070/0x2070 [ 42.453177] ? do_wait_intr_irq+0x3e0/0x3e0 [ 42.457479] ? __lockdep_init_map+0xe4/0x650 [ 42.461861] ? do_raw_spin_trylock+0x190/0x190 [ 42.466415] ? lockdep_init_map+0x9/0x10 [ 42.470448] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 42.475522] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.480522] ? trace_hardirqs_on+0xd/0x10 [ 42.484677] ? __kthread_parkme+0x175/0x240 [ 42.488974] kthread+0x33c/0x400 [ 42.492314] ? process_one_work+0x1af0/0x1af0 [ 42.496778] ? kthread_stop+0x7a0/0x7a0 [ 42.500724] ret_from_fork+0x3a/0x50 [ 42.504423] Code: 41 f6 87 83 00 00 00 04 75 37 e8 0f da 94 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 [ 42.523499] RIP: ip6t_do_table+0x132d/0x1a30 RSP: ffff8801d9856d48 [ 42.529833] ---[ end trace 0a46702840bc94bb ]--- [ 42.530087] kasan: CONFIG_KASAN_INLINE enabled [ 42.534582] Kernel panic - not syncing: Fatal exception in interrupt [ 42.539190] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.546012] Dumping ftrace buffer: [ 42.546016] (ftrace buffer empty) [ 42.546018] Kernel Offset: disabled [ 42.564127] Rebooting in 86400 seconds..