[....] Starting enhanced syslogd: rsyslogd[ 14.920414] audit: type=1400 audit(1520528668.688:5): avc: denied { syslog } for pid=4063 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.861146] audit: type=1400 audit(1520528672.628:6): avc: denied { map } for pid=4202 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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program [ 49.438759] audit: type=1400 audit(1520528703.206:7): avc: denied { map } for pid=4219 comm="syzkaller072406" path="/root/syzkaller072406011" 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 [ 49.444945] IPVS: ftp: loaded support on port[0] = 21 [ 49.488816] BUG: unable to handle kernel paging request at ffffc900017df5c5 [ 49.495927] IP: ebt_among_mt_check+0x1f8/0x390 [ 49.500473] PGD 1dad2f067 P4D 1dad2f067 PUD 1dad30067 PMD 1cf4e3067 PTE 0 [ 49.507374] Oops: 0000 [#1] SMP KASAN [ 49.511142] Dumping ftrace buffer: [ 49.514649] (ftrace buffer empty) [ 49.518331] Modules linked in: [ 49.521493] CPU: 0 PID: 4220 Comm: syzkaller072406 Not tainted 4.16.0-rc4+ #346 [ 49.528904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.538232] RIP: 0010:ebt_among_mt_check+0x1f8/0x390 [ 49.543302] RSP: 0018:ffff8801cbfa7198 EFLAGS: 00010246 [ 49.548635] RAX: 0000000000000008 RBX: ffffc900017d71c0 RCX: ffffffff851bb706 [ 49.555871] RDX: 0000000000000000 RSI: 00000000000008f8 RDI: ffffc900017df5c5 [ 49.563108] RBP: ffff8801cbfa71d0 R08: 0000000000000000 R09: 0000000000000000 [ 49.570345] R10: ffffffff88613380 R11: 0000000000000000 R12: ffffc900017df1c1 [ 49.577587] R13: ffffffff851bb540 R14: 00000000000008f8 R15: ffffffff87701080 [ 49.584825] FS: 00000000007da880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 49.593019] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.598866] CR2: ffffc900017df5c5 CR3: 00000001b3790004 CR4: 00000000001606f0 [ 49.606109] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.613347] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.620606] Call Trace: [ 49.623163] ? module_unload_free+0x5b0/0x5b0 [ 49.627628] ? ebt_mac_wormhash_check_integrity+0x1e0/0x1e0 [ 49.633307] xt_check_match+0x235/0x9c0 [ 49.637252] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 49.642414] ? xt_check_target+0x990/0x990 [ 49.646622] ? mutex_unlock+0xd/0x10 [ 49.650311] ? mutex_unlock+0xd/0x10 [ 49.653991] ? xt_find_match+0x17b/0x1e0 [ 49.658021] ebt_check_entry+0xbc3/0x1e00 [ 49.662146] ? ebt_standard_compat_to_user+0x180/0x180 [ 49.667396] ? __is_insn_slot_addr+0x1fc/0x330 [ 49.671950] ? print_irqtrace_events+0x270/0x270 [ 49.676678] ? trace_hardirqs_off+0x10/0x10 [ 49.680968] ? find_held_lock+0x35/0x1d0 [ 49.685001] ? __lock_acquire+0x664/0x3e00 [ 49.689212] translate_table+0xcf5/0x2290 [ 49.693335] ? ebt_do_table+0x1f40/0x1f40 [ 49.697454] ? check_same_owner+0x320/0x320 [ 49.701742] ? rcu_pm_notify+0xc0/0xc0 [ 49.705603] ? rcu_read_lock_sched_held+0x108/0x120 [ 49.710589] do_replace_finish+0x79a/0x2620 [ 49.714889] ? ebt_register_table+0xe60/0xe60 [ 49.719351] ? find_held_lock+0x35/0x1d0 [ 49.723383] ? __might_fault+0x110/0x1d0 [ 49.727411] ? lock_downgrade+0x980/0x980 [ 49.731527] ? lock_release+0xa40/0xa40 [ 49.735467] ? check_same_owner+0x320/0x320 [ 49.739758] ? __check_object_size+0x8b/0x530 [ 49.744225] ? __might_sleep+0x95/0x190 [ 49.748169] ? kasan_check_write+0x14/0x20 [ 49.752371] ? _copy_from_user+0x99/0x110 [ 49.756488] do_replace+0x333/0x4b0 [ 49.760084] ? compat_copy_everything_to_user+0x1470/0x1470 [ 49.765770] ? ns_capable_common+0xcf/0x160 [ 49.770064] do_ebt_set_ctl+0xd4/0x110 [ 49.773919] nf_setsockopt+0x67/0xc0 [ 49.777614] ip_setsockopt+0x97/0xa0 [ 49.781303] udp_setsockopt+0x45/0x80 [ 49.785077] ipv6_setsockopt+0xa0/0x130 [ 49.789029] dccp_setsockopt+0x85/0xd0 [ 49.792895] sock_common_setsockopt+0x95/0xd0 [ 49.797362] SyS_setsockopt+0x189/0x360 [ 49.801309] ? SyS_recv+0x40/0x40 [ 49.804734] ? mm_fault_error+0x2c0/0x2c0 [ 49.808851] ? move_addr_to_kernel+0x60/0x60 [ 49.813229] ? trace_hardirqs_on+0xd/0x10 [ 49.817351] ? do_syscall_64+0xb7/0x940 [ 49.821304] ? SyS_recv+0x40/0x40 [ 49.824726] do_syscall_64+0x281/0x940 [ 49.828581] ? __do_page_fault+0xc90/0xc90 [ 49.832782] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.837506] ? syscall_return_slowpath+0x550/0x550 [ 49.842404] ? syscall_return_slowpath+0x2ac/0x550 [ 49.847301] ? prepare_exit_to_usermode+0x350/0x350 [ 49.852287] ? retint_user+0x18/0x18 [ 49.855973] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.860792] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 49.865948] RIP: 0033:0x442499 [ 49.869107] RSP: 002b:00007ffe1db7ed08 EFLAGS: 00000213 ORIG_RAX: 0000000000000036 [ 49.876783] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442499 [ 49.884022] RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000003 [ 49.891259] RBP: 00000000006cd018 R08: 0000000000000c10 R09: 0000000000000000 [ 49.898495] R10: 0000000020000140 R11: 0000000000000213 R12: 0000000000403920 [ 49.905733] R13: 00000000004039b0 R14: 0000000000000000 R15: 0000000000000000 [ 49.912976] Code: 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 01 00 00 <45> 8b ac 24 04 04 00 00 41 81 fd a9 aa aa 0a 77 8f e8 c2 4e 55 [ 49.932045] RIP: ebt_among_mt_check+0x1f8/0x390 RSP: ffff8801cbfa7198 [ 49.938588] CR2: ffffc900017df5c5 [ 49.942016] ---[ end trace 41c76f0aeaefd3e1 ]--- [ 49.946736] Kernel panic - not syncing: Fatal exception [ 49.952423] Dumping ftrace buffer: [ 49.955933] (ftrace buffer empty) [ 49.959611] Kernel Offset: disabled [ 49.963206] Rebooting in 86400 seconds..