[....] Starting enhanced syslogd: rsyslogd[ 5.146280] audit: type=1400 audit(1513163890.576:5): avc: denied { syslog } for pid=2962 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: [ 9.479952] audit: type=1400 audit(1513163894.909:6): avc: denied { map } for pid=3101 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 'ci-upstream-next-kasan-gce-8,10.128.0.56' (ECDSA) to the list of known hosts. executing program [ 15.350590] audit: type=1400 audit(1513163900.780:7): avc: denied { map } for pid=3115 comm="syzkaller713832" path="/root/syzkaller713832919" 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 [ 15.355653] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 15.356720] IP: page_mapping+0x13/0x130 [ 15.357247] PGD 214186067 P4D 214186067 PUD 213479067 PMD 0 [ 15.358017] Oops: 0000 [#1] SMP [ 15.358461] Dumping ftrace buffer: [ 15.358933] (ftrace buffer empty) [ 15.359452] Modules linked in: [ 15.359905] CPU: 1 PID: 3115 Comm: syzkaller713832 Not tainted 4.15.0-rc3-next-20171213+ #66 [ 15.361021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 15.362244] RIP: 0010:page_mapping+0x13/0x130 [ 15.362837] RSP: 0018:ffffc900017abb98 EFLAGS: 00010293 [ 15.363554] RAX: ffff880213652240 RBX: 0000000000000000 RCX: ffffffff81377f83 [ 15.364516] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 15.365466] RBP: ffffc900017abbb8 R08: 0000000000000000 R09: ffff8802164af250 [ 15.366433] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802164af180 [ 15.367383] R13: ffff8802164af000 R14: ffff88020db7b7c0 R15: ffff880213404730 [ 15.368378] FS: 00000000021c7880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 15.369449] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.370222] CR2: 0000000000000020 CR3: 000000021364f000 CR4: 00000000001406e0 [ 15.373999] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 15.381238] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 15.388470] Call Trace: [ 15.391647] set_page_dirty+0x1b/0x150 [ 15.395499] rds_atomic_free_op+0x25/0x80 [ 15.399610] rds_message_put+0x174/0x1b0 [ 15.403633] rds_sendmsg+0x7ac/0xcb0 [ 15.407313] ? selinux_socket_sendmsg+0x1b/0x20 [ 15.411947] ? security_socket_sendmsg+0x5d/0x80 [ 15.416667] sock_sendmsg+0x51/0x70 [ 15.420258] ___sys_sendmsg+0x35e/0x3b0 [ 15.424197] ? _raw_spin_unlock+0x22/0x30 [ 15.428310] ? do_huge_pmd_anonymous_page+0x3f9/0x850 [ 15.433465] ? __handle_mm_fault+0x2ec/0x1930 [ 15.437925] ? find_held_lock+0x35/0xa0 [ 15.441862] ? __fget_light+0x64/0xa0 [ 15.445627] ? __fdget+0x18/0x20 [ 15.448959] __sys_sendmsg+0x50/0x90 [ 15.452635] ? __sys_sendmsg+0x50/0x90 [ 15.456488] SyS_sendmsg+0x2d/0x50 [ 15.459992] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 15.464711] RIP: 0033:0x4400a9 [ 15.467866] RSP: 002b:00007fff97b55488 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 15.475797] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 15.485637] RDX: 0000000000000040 RSI: 000000002048cfe4 RDI: 0000000000000003 [ 15.495570] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 15.505407] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401a10 [ 15.513421] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 [ 15.520660] Code: 14 24 f4 ff 48 c7 c7 c8 57 a4 82 e8 46 01 24 01 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb e8 ed 23 f4 ff <4c> 8b 63 20 41 f6 c4 01 0f 85 c8 00 00 00 e8 da 23 f4 ff 4c 8b [ 15.539690] RIP: page_mapping+0x13/0x130 RSP: ffffc900017abb98 [ 15.545622] CR2: 0000000000000020 [ 15.549077] ---[ end trace 35e760b7322fed80 ]--- [ 15.553923] Kernel panic - not syncing: Fatal exception [ 15.559694] Dumping ftrace buffer: [ 15.563196] (ftrace buffer empty) [ 15.566869] Kernel Offset: disabled [ 15.570459] Rebooting in 86400 seconds..