[....] Starting enhanced syslogd: rsyslogd[ 12.155104] audit: type=1400 audit(1515567587.594:5): avc: denied { syslog } for pid=3350 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: [ 16.633320] audit: type=1400 audit(1515567592.073:6): avc: denied { map } for pid=3488 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 '10.128.0.22' (ECDSA) to the list of known hosts. executing program [ 22.874671] audit: type=1400 audit(1515567598.314:7): avc: denied { map } for pid=3503 comm="syzkaller938388" path="/root/syzkaller938388439" 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 [ 22.900733] audit: type=1400 audit(1515567598.314:8): avc: denied { prog_load } for pid=3503 comm="syzkaller938388" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 22.924613] audit: type=1400 audit(1515567598.363:9): avc: denied { prog_run } for pid=3503 comm="syzkaller938388" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 22.955105] ------------[ cut here ]------------ [ 22.959904] kernel BUG at net/l2tp/l2tp_ppp.c:176! [ 22.964911] invalid opcode: 0000 [#1] SMP KASAN [ 22.969571] Dumping ftrace buffer: [ 22.973083] (ftrace buffer empty) [ 22.976763] Modules linked in: [ 22.979926] CPU: 1 PID: 3503 Comm: syzkaller938388 Not tainted 4.15.0-rc7+ #181 [ 22.987347] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.996681] RIP: 0010:pppol2tp_sendmsg+0x512/0x670 [ 23.001575] RSP: 0018:ffff8801d4887438 EFLAGS: 00010293 [ 23.006903] RAX: ffff8801bfef2180 RBX: ffff8801bff88440 RCX: ffffffff84ffbca2 [ 23.014140] RDX: 0000000000000000 RSI: ffff8801d4887598 RDI: ffff8801bff88820 [ 23.021375] RBP: ffff8801d48874a8 R08: 0000000000000000 R09: 1ffff1003a910e17 [ 23.028610] R10: 0000000000000003 R11: 0000000000000001 R12: ffff8801bfff9bc0 [ 23.035856] R13: 0000000000000000 R14: 0000000000008000 R15: 0000000000000000 [ 23.043094] FS: 0000000001194880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.051295] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.057154] CR2: 0000000020ea0000 CR3: 00000001bfecf001 CR4: 00000000001606e0 [ 23.064401] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.071638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.078877] Call Trace: [ 23.081441] ? selinux_socket_sendmsg+0x36/0x40 [ 23.086098] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 23.090912] sock_sendmsg+0xca/0x110 [ 23.094604] kernel_sendmsg+0x47/0x60 [ 23.098381] sock_no_sendpage+0x1cc/0x280 [ 23.102497] ? sock_no_shutdown+0x10/0x10 [ 23.106612] ? kcm_write_msgs+0xfa7/0x1b80 [ 23.110820] ? lock_downgrade+0x980/0x980 [ 23.114950] ? __local_bh_enable_ip+0x121/0x230 [ 23.119595] kernel_sendpage+0xbf/0xe0 [ 23.123455] kcm_write_msgs+0x404/0x1b80 [ 23.127494] ? retint_kernel+0x10/0x10 [ 23.131355] ? kcm_release+0x860/0x860 [ 23.135211] ? copyin+0x91/0xb0 [ 23.138462] ? check_stack_object+0x140/0x140 [ 23.142924] ? iov_iter_advance+0x13f0/0x13f0 [ 23.147385] ? lock_sock_nested+0x91/0x110 [ 23.151589] ? trace_hardirqs_on+0xd/0x10 [ 23.155714] ? __local_bh_enable_ip+0x121/0x230 [ 23.160354] kcm_sendmsg+0x148d/0x22d0 [ 23.164218] ? __might_sleep+0x95/0x190 [ 23.168171] ? rw_copy_check_uvector+0x161/0x280 [ 23.172905] ? kcm_sendpage+0x1900/0x1900 [ 23.177029] ? sock_has_perm+0x2a4/0x420 [ 23.181056] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 23.186385] ? dup_iter+0x202/0x260 [ 23.189987] ? copy_msghdr_from_user+0x3a6/0x590 [ 23.194714] ? selinux_socket_sendmsg+0x36/0x40 [ 23.199352] ? security_socket_sendmsg+0x89/0xb0 [ 23.204076] ? kcm_sendpage+0x1900/0x1900 [ 23.208193] sock_sendmsg+0xca/0x110 [ 23.211872] ___sys_sendmsg+0x767/0x8b0 [ 23.215815] ? copy_msghdr_from_user+0x590/0x590 [ 23.220547] ? __do_page_fault+0x5f7/0xc90 [ 23.224748] ? lock_downgrade+0x980/0x980 [ 23.228866] ? __fget_light+0x297/0x380 [ 23.232820] ? fget_raw+0x20/0x20 [ 23.236240] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.240791] ? vmacache_find+0x5f/0x280 [ 23.244738] ? up_read+0x1a/0x40 [ 23.248076] ? __do_page_fault+0x3d6/0xc90 [ 23.252280] ? __fdget+0x18/0x20 [ 23.255618] __sys_sendmsg+0xe5/0x210 [ 23.259383] ? __sys_sendmsg+0xe5/0x210 [ 23.263324] ? SyS_shutdown+0x290/0x290 [ 23.267267] ? __do_page_fault+0xc90/0xc90 [ 23.271479] ? __fd_install+0x6cb/0x740 [ 23.275427] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.280412] SyS_sendmsg+0x2d/0x50 [ 23.283920] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.288642] RIP: 0033:0x440159 [ 23.291797] RSP: 002b:00007ffe74df8288 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 23.299468] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440159 [ 23.306706] RDX: 0000000000000000 RSI: 00000000201fcfc8 RDI: 0000000000000005 [ 23.313952] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 23.321199] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401ac0 [ 23.328436] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 23.335680] Code: c5 61 70 fc 48 8b 7d d0 e8 7c c2 5b fd 84 c0 74 0d e8 b3 61 70 fc 48 89 df e8 3b 49 2f ff 41 bd f7 ff ff ff eb 86 e8 9e 61 70 fc <0f> 0b 41 bd 95 ff ff ff e9 74 ff ff ff e8 ec 32 a8 fc e9 77 fb [ 23.354752] RIP: pppol2tp_sendmsg+0x512/0x670 RSP: ffff8801d4887438 [ 23.361215] ---[ end trace 801e405e4a8b3e54 ]--- [ 23.365987] Kernel panic - not syncing: Fatal exception [ 23.371778] Dumping ftrace buffer: [ 23.375287] (ftrace buffer empty) [ 23.378963] Kernel Offset: disabled [ 23.382558] Rebooting in 86400 seconds..