[....] Starting enhanced syslogd: rsyslogd[ 12.303927] audit: type=1400 audit(1515570029.905:5): avc: denied { syslog } for pid=3343 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: [ 17.167884] audit: type=1400 audit(1515570034.769:6): avc: denied { map } for pid=3482 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 '10.128.15.218' (ECDSA) to the list of known hosts. executing program [ 23.388330] audit: type=1400 audit(1515570040.990:7): avc: denied { map } for pid=3496 comm="syzkaller081004" path="/root/syzkaller081004899" 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 [ 23.414349] audit: type=1400 audit(1515570040.990:8): avc: denied { prog_load } for pid=3496 comm="syzkaller081004" 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 [ 23.437534] audit: type=1400 audit(1515570041.039:9): avc: denied { prog_run } for pid=3496 comm="syzkaller081004" 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 [ 23.466737] ------------[ cut here ]------------ [ 23.471510] kernel BUG at net/l2tp/l2tp_ppp.c:176! [ 23.476502] invalid opcode: 0000 [#1] SMP KASAN [ 23.481152] Dumping ftrace buffer: [ 23.484658] (ftrace buffer empty) [ 23.488337] Modules linked in: [ 23.491498] CPU: 1 PID: 3496 Comm: syzkaller081004 Not tainted 4.15.0-rc6-mm1+ #52 [ 23.499169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.508497] RIP: 0010:pppol2tp_sendmsg+0x4fd/0x660 [ 23.513390] RSP: 0018:ffff8801c53af438 EFLAGS: 00010293 [ 23.518721] RAX: ffff8801c0656000 RBX: ffff8801c0016ec0 RCX: ffffffff8503a61d [ 23.525957] RDX: 0000000000000000 RSI: ffff8801c53af598 RDI: ffff8801c00172a0 [ 23.533193] RBP: ffff8801c53af4a8 R08: 0000000000000000 R09: 1ffff10038a75e17 [ 23.540428] R10: 0000000000000003 R11: 0000000000000001 R12: ffff8801c0109bc0 [ 23.547664] R13: 0000000000000000 R14: 0000000000008000 R15: 0000000000000000 [ 23.554909] FS: 0000000002196880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.563107] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.568961] CR2: 0000000020ea0000 CR3: 00000001c05fb002 CR4: 00000000001606e0 [ 23.576202] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.583449] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.590693] Call Trace: [ 23.593257] ? selinux_socket_sendmsg+0x36/0x40 [ 23.597897] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 23.602737] sock_sendmsg+0xca/0x110 [ 23.606424] kernel_sendmsg+0x47/0x60 [ 23.610203] sock_no_sendpage+0x1cc/0x280 [ 23.614335] ? sock_no_shutdown+0x10/0x10 [ 23.618452] ? kcm_write_msgs+0xfa7/0x1b80 [ 23.622666] ? lock_downgrade+0x980/0x980 [ 23.626787] ? __local_bh_enable_ip+0x121/0x230 [ 23.631427] kernel_sendpage+0xbf/0xe0 [ 23.635285] kcm_write_msgs+0x404/0x1b80 [ 23.639313] ? retint_kernel+0x10/0x10 [ 23.643178] ? kcm_release+0x860/0x860 [ 23.647047] ? copyin+0x91/0xb0 [ 23.650315] ? report_usercopy+0xd0/0xd0 [ 23.654356] ? iov_iter_advance+0x13f0/0x13f0 [ 23.658819] ? lock_sock_nested+0x91/0x110 [ 23.663021] ? trace_hardirqs_on+0xd/0x10 [ 23.667137] ? __local_bh_enable_ip+0x121/0x230 [ 23.671775] kcm_sendmsg+0x148d/0x22d0 [ 23.675629] ? __might_sleep+0x95/0x190 [ 23.679576] ? rw_copy_check_uvector+0x161/0x280 [ 23.684299] ? kcm_sendpage+0x1900/0x1900 [ 23.688413] ? sock_has_perm+0x2a4/0x420 [ 23.692441] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 23.697771] ? dup_iter+0x192/0x260 [ 23.701381] ? copy_msghdr_from_user+0x3a6/0x590 [ 23.706108] ? selinux_socket_sendmsg+0x36/0x40 [ 23.710743] ? security_socket_sendmsg+0x89/0xb0 [ 23.715464] ? kcm_sendpage+0x1900/0x1900 [ 23.719581] sock_sendmsg+0xca/0x110 [ 23.723274] ___sys_sendmsg+0x767/0x8b0 [ 23.727221] ? copy_msghdr_from_user+0x590/0x590 [ 23.731949] ? __do_page_fault+0x5f7/0xc90 [ 23.736164] ? lock_downgrade+0x980/0x980 [ 23.740283] ? __fget_light+0x297/0x380 [ 23.744223] ? fget_raw+0x20/0x20 [ 23.747642] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.752188] ? vmacache_find+0x5f/0x280 [ 23.756132] ? up_read+0x1a/0x40 [ 23.759463] ? __do_page_fault+0x3d6/0xc90 [ 23.763666] ? __fdget+0x18/0x20 [ 23.767003] __sys_sendmsg+0xe5/0x210 [ 23.770775] ? __sys_sendmsg+0xe5/0x210 [ 23.774716] ? SyS_shutdown+0x290/0x290 [ 23.778660] ? __do_page_fault+0xc90/0xc90 [ 23.782864] ? __fd_install+0x6ab/0x740 [ 23.786811] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.791797] SyS_sendmsg+0x2d/0x50 [ 23.795305] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.800033] RIP: 0033:0x440159 [ 23.803199] RSP: 002b:00007ffc7e77e888 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 23.810871] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440159 [ 23.818109] RDX: 0000000000000000 RSI: 00000000201fcfc8 RDI: 0000000000000005 [ 23.825347] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 23.832589] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401ac0 [ 23.839826] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 23.847083] Code: ba ad 6c fc 48 8b 7d d0 e8 a1 94 58 fd 84 c0 74 0d e8 a8 ad 6c fc 48 89 df e8 60 90 2e ff 41 bd f7 ff ff ff eb 86 e8 93 ad 6c fc <0f> 0b 41 bd 95 ff ff ff e9 74 ff ff ff e8 a1 bd a4 fc e9 8c fb [ 23.866258] RIP: pppol2tp_sendmsg+0x4fd/0x660 RSP: ffff8801c53af438 [ 23.872765] ---[ end trace f56c69444f7d5a8a ]--- [ 23.877797] Kernel panic - not syncing: Fatal exception [ 23.883632] Dumping ftrace buffer: [ 23.887146] (ftrace buffer empty) [ 23.890823] Kernel Offset: disabled [ 23.894417] Rebooting in 86400 seconds..