[....] Starting enhanced syslogd: rsyslogd[ 12.616509] audit: type=1400 audit(1515570453.014:5): avc: denied { syslog } for pid=3340 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: [ 18.858486] audit: type=1400 audit(1515570459.256:6): avc: denied { map } for pid=3479 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 '10.128.15.245' (ECDSA) to the list of known hosts. executing program [ 25.048316] audit: type=1400 audit(1515570465.446:7): avc: denied { map } for pid=3493 comm="syzkaller448397" path="/root/syzkaller448397511" 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 [ 25.074702] audit: type=1400 audit(1515570465.446:8): avc: denied { prog_load } for pid=3493 comm="syzkaller448397" 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 [ 25.097751] audit: type=1400 audit(1515570465.495:9): avc: denied { prog_run } for pid=3493 comm="syzkaller448397" 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 [ 25.124736] ------------[ cut here ]------------ [ 25.129527] kernel BUG at net/l2tp/l2tp_ppp.c:176! [ 25.134520] invalid opcode: 0000 [#1] SMP KASAN [ 25.139166] Dumping ftrace buffer: [ 25.142683] (ftrace buffer empty) [ 25.146362] Modules linked in: [ 25.149524] CPU: 1 PID: 3493 Comm: syzkaller448397 Not tainted 4.15.0-rc7+ #255 [ 25.156934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.166263] RIP: 0010:pppol2tp_sendmsg+0x512/0x670 [ 25.171164] RSP: 0018:ffff8801c045f438 EFLAGS: 00010293 [ 25.176501] RAX: ffff8801c009c140 RBX: ffff8801c01f4580 RCX: ffffffff84fd4842 [ 25.183738] RDX: 0000000000000000 RSI: ffff8801c045f598 RDI: ffff8801c01f4960 [ 25.190982] RBP: ffff8801c045f4a8 R08: 0000000000000000 R09: 1ffff1003808be17 [ 25.198226] R10: 0000000000000003 R11: 0000000000000001 R12: ffff8801c052fbc0 [ 25.205479] R13: 0000000000000000 R14: 0000000000008000 R15: 0000000000000000 [ 25.212719] FS: 00000000011ec880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.220941] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.226800] CR2: 0000000020ea0000 CR3: 00000001c098a004 CR4: 00000000001606e0 [ 25.234049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.241288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.248525] Call Trace: [ 25.251084] ? selinux_socket_sendmsg+0x36/0x40 [ 25.255721] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 25.260537] sock_sendmsg+0xca/0x110 [ 25.264221] kernel_sendmsg+0x47/0x60 [ 25.267992] sock_no_sendpage+0x1cc/0x280 [ 25.272115] ? sock_kzfree_s+0x60/0x60 [ 25.276059] ? kcm_write_msgs+0xfa7/0x1b80 [ 25.280261] ? lock_downgrade+0x980/0x980 [ 25.284381] ? __local_bh_enable_ip+0x121/0x230 [ 25.289019] kernel_sendpage+0xbf/0xe0 [ 25.292878] kcm_write_msgs+0x404/0x1b80 [ 25.296917] ? retint_kernel+0x10/0x10 [ 25.300778] ? kcm_release+0x860/0x860 [ 25.304643] ? copyin+0x91/0xb0 [ 25.307898] ? check_stack_object+0x140/0x140 [ 25.312360] ? iov_iter_advance+0x13f0/0x13f0 [ 25.316825] ? lock_sock_nested+0x91/0x110 [ 25.321040] ? trace_hardirqs_on+0xd/0x10 [ 25.325164] ? __local_bh_enable_ip+0x121/0x230 [ 25.329814] kcm_sendmsg+0x148d/0x22d0 [ 25.333668] ? __might_sleep+0x95/0x190 [ 25.337615] ? rw_copy_check_uvector+0x151/0x280 [ 25.342346] ? kcm_sendpage+0x1900/0x1900 [ 25.346469] ? sock_has_perm+0x2a4/0x420 [ 25.350507] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.355838] ? dup_iter+0x212/0x260 [ 25.359433] ? copy_msghdr_from_user+0x3a6/0x590 [ 25.364164] ? selinux_socket_sendmsg+0x36/0x40 [ 25.368800] ? security_socket_sendmsg+0x89/0xb0 [ 25.373524] ? kcm_sendpage+0x1900/0x1900 [ 25.377646] sock_sendmsg+0xca/0x110 [ 25.381328] ___sys_sendmsg+0x767/0x8b0 [ 25.385270] ? copy_msghdr_from_user+0x590/0x590 [ 25.389997] ? __do_page_fault+0x5f7/0xc90 [ 25.394200] ? lock_downgrade+0x980/0x980 [ 25.398316] ? __fget_light+0x297/0x380 [ 25.402255] ? fget_raw+0x20/0x20 [ 25.405679] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.410228] ? vmacache_find+0x5f/0x280 [ 25.414182] ? up_read+0x1a/0x40 [ 25.417517] ? __do_page_fault+0x3d6/0xc90 [ 25.421725] ? __fdget+0x18/0x20 [ 25.425062] __sys_sendmsg+0xe5/0x210 [ 25.428827] ? __sys_sendmsg+0xe5/0x210 [ 25.432773] ? SyS_shutdown+0x290/0x290 [ 25.436717] ? __do_page_fault+0xc90/0xc90 [ 25.440919] ? __fd_install+0x6bb/0x740 [ 25.444876] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.449862] SyS_sendmsg+0x2d/0x50 [ 25.453372] entry_SYSCALL_64_fastpath+0x23/0x9a [ 25.458094] RIP: 0033:0x440159 [ 25.461252] RSP: 002b:00007ffde0df83f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 25.468926] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440159 [ 25.476169] RDX: 0000000000000000 RSI: 00000000201fcfc8 RDI: 0000000000000005 [ 25.483404] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 25.490640] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401ac0 [ 25.497882] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 25.505133] Code: 65 cf 72 fc 48 8b 7d d0 e8 6c 45 5d fd 84 c0 74 0d e8 53 cf 72 fc 48 89 df e8 5b 9b 30 ff 41 bd f7 ff ff ff eb 86 e8 3e cf 72 fc <0f> 0b 41 bd 95 ff ff ff e9 74 ff ff ff e8 5c be a9 fc e9 77 fb [ 25.524203] RIP: pppol2tp_sendmsg+0x512/0x670 RSP: ffff8801c045f438 [ 25.530665] ---[ end trace 2854fd2630fc8815 ]--- [ 25.535410] Kernel panic - not syncing: Fatal exception [ 25.540775] Dumping ftrace buffer: [ 25.544292] (ftrace buffer empty) [ 25.547969] Kernel Offset: disabled [ 25.551561] Rebooting in 86400 seconds..