[....] Starting enhanced syslogd: rsyslogd[ 12.238553] audit: type=1400 audit(1515570223.431:5): avc: denied { syslog } for pid=3349 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: [ 16.874432] audit: type=1400 audit(1515570228.067:6): avc: denied { map } for pid=3489 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 '10.128.15.226' (ECDSA) to the list of known hosts. executing program [ 23.085519] audit: type=1400 audit(1515570234.278:7): avc: denied { map } for pid=3504 comm="syzkaller225418" path="/root/syzkaller225418913" 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 [ 23.111725] audit: type=1400 audit(1515570234.281:8): avc: denied { prog_load } for pid=3504 comm="syzkaller225418" 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 [ 23.134654] audit: type=1400 audit(1515570234.327:9): avc: denied { prog_run } for pid=3504 comm="syzkaller225418" 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 [ 23.161764] ------------[ cut here ]------------ [ 23.166534] kernel BUG at net/l2tp/l2tp_ppp.c:176! [ 23.171517] invalid opcode: 0000 [#1] SMP KASAN [ 23.176164] Dumping ftrace buffer: [ 23.179673] (ftrace buffer empty) [ 23.183353] Modules linked in: [ 23.186519] CPU: 1 PID: 3504 Comm: syzkaller225418 Not tainted 4.15.0-rc7-next-20180110+ #93 [ 23.196544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.205876] RIP: 0010:pppol2tp_sendmsg+0x512/0x670 [ 23.210784] RSP: 0018:ffff8801c172f438 EFLAGS: 00010293 [ 23.216120] RAX: ffff8801c0b1c140 RBX: ffff8801c30431c0 RCX: ffffffff8503c952 [ 23.223354] RDX: 0000000000000000 RSI: ffff8801c172f598 RDI: ffff8801c30435a0 [ 23.230598] RBP: ffff8801c172f4a8 R08: 0000000000000000 R09: 1ffff100382e5e17 [ 23.237835] R10: 0000000000000003 R11: 0000000000000001 R12: ffff8801c1bc5bc0 [ 23.245078] R13: 0000000000000000 R14: 0000000000008000 R15: 0000000000000000 [ 23.252315] FS: 0000000002384880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.260506] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.266353] CR2: 0000000020ea0000 CR3: 00000001c0a5a006 CR4: 00000000001606e0 [ 23.273592] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.280840] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.288075] Call Trace: [ 23.290640] ? selinux_socket_sendmsg+0x36/0x40 [ 23.295276] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 23.300104] sock_sendmsg+0xca/0x110 [ 23.303785] kernel_sendmsg+0x47/0x60 [ 23.307561] sock_no_sendpage+0x1cc/0x280 [ 23.311679] ? sock_no_shutdown+0x10/0x10 [ 23.315801] ? kcm_write_msgs+0xfa7/0x1b80 [ 23.320005] ? lock_downgrade+0x980/0x980 [ 23.324125] ? __local_bh_enable_ip+0x121/0x230 [ 23.328766] kernel_sendpage+0xbf/0xe0 [ 23.332624] kcm_write_msgs+0x404/0x1b80 [ 23.336654] ? retint_kernel+0x10/0x10 [ 23.340520] ? kcm_release+0x860/0x860 [ 23.344385] ? copyin+0x91/0xb0 [ 23.347635] ? report_usercopy+0xd0/0xd0 [ 23.351680] ? iov_iter_advance+0x13f0/0x13f0 [ 23.356152] ? lock_sock_nested+0x91/0x110 [ 23.360361] ? trace_hardirqs_on+0xd/0x10 [ 23.364478] ? __local_bh_enable_ip+0x121/0x230 [ 23.369117] kcm_sendmsg+0x148d/0x22d0 [ 23.372989] ? __might_sleep+0x95/0x190 [ 23.376940] ? rw_copy_check_uvector+0x1a1/0x280 [ 23.381675] ? kcm_sendpage+0x1900/0x1900 [ 23.386226] ? sock_has_perm+0x2a4/0x420 [ 23.390257] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 23.395590] ? dup_iter+0x232/0x260 [ 23.399190] ? copy_msghdr_from_user+0x3a6/0x590 [ 23.403921] ? selinux_socket_sendmsg+0x36/0x40 [ 23.408558] ? security_socket_sendmsg+0x89/0xb0 [ 23.413953] ? kcm_sendpage+0x1900/0x1900 [ 23.419198] sock_sendmsg+0xca/0x110 [ 23.422882] ___sys_sendmsg+0x767/0x8b0 [ 23.426826] ? copy_msghdr_from_user+0x590/0x590 [ 23.431565] ? __do_page_fault+0x5f7/0xc90 [ 23.435767] ? lock_downgrade+0x980/0x980 [ 23.439897] ? __fget_light+0x297/0x380 [ 23.443837] ? fget_raw+0x20/0x20 [ 23.447259] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.451814] ? vmacache_find+0x5f/0x280 [ 23.455765] ? up_read+0x1a/0x40 [ 23.459104] ? __do_page_fault+0x3d6/0xc90 [ 23.463308] ? __fdget+0x18/0x20 [ 23.467166] __sys_sendmsg+0xe5/0x210 [ 23.471546] ? __sys_sendmsg+0xe5/0x210 [ 23.475488] ? SyS_shutdown+0x290/0x290 [ 23.479432] ? __do_page_fault+0xc90/0xc90 [ 23.483634] ? __fd_install+0x6eb/0x740 [ 23.487927] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.492922] SyS_sendmsg+0x2d/0x50 [ 23.496431] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 23.501152] RIP: 0033:0x440159 [ 23.504310] RSP: 002b:00007ffdbe9ea9b8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 23.511982] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440159 [ 23.519219] RDX: 0000000000000000 RSI: 00000000201fcfc8 RDI: 0000000000000005 [ 23.526988] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 23.534228] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401ac0 [ 23.541465] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 23.548718] Code: c5 99 6c fc 48 8b 7d d0 e8 cc d9 58 fd 84 c0 74 0d e8 b3 99 6c fc 48 89 df e8 2b 3d 2f ff 41 bd f7 ff ff ff eb 86 e8 9e 99 6c fc <0f> 0b 41 bd 95 ff ff ff e9 74 ff ff ff e8 2c bd a4 fc e9 77 fb [ 23.567794] RIP: pppol2tp_sendmsg+0x512/0x670 RSP: ffff8801c172f438 [ 23.574273] ---[ end trace bdb98fa7e33c5c38 ]--- [ 23.580057] Kernel panic - not syncing: Fatal exception [ 23.585482] Dumping ftrace buffer: [ 23.588991] (ftrace buffer empty) [ 23.592685] Kernel Offset: disabled [ 23.596292] Rebooting in 86400 seconds..