[....] Starting enhanced syslogd: rsyslogd[ 6.169147] audit: type=1400 audit(1513627239.850:5): avc: denied { syslog } for pid=2959 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: [ 11.938758] audit: type=1400 audit(1513627245.619:6): avc: denied { map } for pid=3097 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-4,10.128.0.59' (ECDSA) to the list of known hosts. executing program [ 17.855550] audit: type=1400 audit(1513627251.536:7): avc: denied { map } for pid=3111 comm="syzkaller879466" path="/root/syzkaller879466382" 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 [ 17.886247] ------------[ cut here ]------------ [ 17.891005] kernel BUG at fs/userfaultfd.c:142! [ 17.895726] invalid opcode: 0000 [#1] SMP [ 17.899838] Dumping ftrace buffer: [ 17.903341] (ftrace buffer empty) [ 17.907018] Modules linked in: [ 17.910179] CPU: 0 PID: 3118 Comm: syzkaller879466 Not tainted 4.15.0-rc3-next-20171214+ #67 [ 17.918712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 17.928038] RIP: 0010:userfaultfd_ctx_get+0x6d/0x70 [ 17.933012] RSP: 0000:ffffc900012f7c30 EFLAGS: 00010293 [ 17.938336] RAX: ffff8802134420c0 RBX: 0000000000000000 RCX: ffffffff8147a98d [ 17.945568] RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffff880213659c40 [ 17.952800] RBP: ffffc900012f7c48 R08: 0000000000000000 R09: 0000000000000004 [ 17.960046] R10: ffffc900012f7cc0 R11: 0000000000000004 R12: ffff880213659c40 [ 17.967282] R13: ffff880214ed6000 R14: 0000000000000200 R15: 0000000000000000 [ 17.974529] FS: 00007fdf76164700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 17.982718] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.988568] CR2: 0000000020687000 CR3: 0000000211d48006 CR4: 00000000001606f0 [ 17.995811] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.003047] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.010281] Call Trace: [ 18.012931] handle_userfault+0xd3/0xa00 [ 18.016960] ? find_held_lock+0x35/0xa0 [ 18.020896] ? do_huge_pmd_anonymous_page+0x564/0x850 [ 18.026051] do_huge_pmd_anonymous_page+0x571/0x850 [ 18.031298] __handle_mm_fault+0xc37/0x1930 [ 18.035583] handle_mm_fault+0x215/0x450 [ 18.039612] __do_page_fault+0x337/0x6b0 [ 18.043635] do_page_fault+0x52/0x330 [ 18.047400] ? page_fault+0x36/0x60 [ 18.050987] page_fault+0x4c/0x60 [ 18.054401] RIP: 0033:0x4453e5 [ 18.057555] RSP: 002b:0000000020687000 EFLAGS: 00010217 [ 18.062879] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004453d9 [ 18.070113] RDX: 0000000020b4c000 RSI: 0000000020687000 RDI: 0000000000000600 [ 18.077346] RBP: 0000000000000000 R08: 00000000207a4f71 R09: 00007fdf76164700 [ 18.084578] R10: 0000000020552ffc R11: 0000000000000202 R12: 0000000000000000 [ 18.091809] R13: 00007ffc6b2b2c2f R14: 00007fdf761649c0 R15: 0000000000000000 [ 18.099134] Code: 5b 41 5c 41 5d 5d c3 e8 d2 f9 e3 ff 85 db 74 16 e8 c9 f9 e3 ff 8d 53 01 89 d8 f0 41 0f b1 55 00 89 c3 74 d7 eb e1 e8 b3 f9 e3 ff <0f> 0b 90 55 48 89 e5 53 48 89 fb e8 a3 f9 e3 ff 48 83 3d 73 bb [ 18.118162] RIP: userfaultfd_ctx_get+0x6d/0x70 RSP: ffffc900012f7c30 [ 18.124659] ---[ end trace c25da3c687899c5a ]--- [ 18.129403] Kernel panic - not syncing: Fatal exception [ 18.135255] Dumping ftrace buffer: [ 18.138758] (ftrace buffer empty) [ 18.142431] Kernel Offset: disabled [ 18.146023] Rebooting in 86400 seconds..