[....] Starting enhanced syslogd: rsyslogd[ 13.152458] audit: type=1400 audit(1516308404.974:5): avc: denied { syslog } for pid=3508 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: [ 19.285467] audit: type=1400 audit(1516308411.107:6): avc: denied { map } for pid=3649 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 '10.128.0.12' (ECDSA) to the list of known hosts. executing program [ 25.489608] audit: type=1400 audit(1516308417.311:7): avc: denied { map } for pid=3663 comm="syzkaller267275" path="/root/syzkaller267275982" 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 [ 25.492472] kasan: CONFIG_KASAN_INLINE enabled [ 25.492484] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.492492] general protection fault: 0000 [#1] SMP KASAN [ 25.492496] Dumping ftrace buffer: [ 25.492500] (ftrace buffer empty) [ 25.492502] Modules linked in: [ 25.492510] CPU: 1 PID: 3663 Comm: syzkaller267275 Not tainted 4.15.0-rc8+ #178 [ 25.492513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.492526] RIP: 0010:strlen+0x1f/0xa0 [ 25.492529] RSP: 0018:ffff8801d944f5c8 EFLAGS: 00010292 [ 25.492535] RAX: 0000000041b58ab3 RBX: ffff8801d96498c0 RCX: 000000000836b156 [ 25.492539] RDX: dffffc0000000000 RSI: ffff8801bbf32000 RDI: 0000000041b58ab3 [ 25.492543] RBP: ffff8801d944f5e0 R08: 1ffff1003b289e21 R09: 0000000000000000 [ 25.492546] R10: ffff8801d944f5d0 R11: ffffed003b289e0c R12: ffff8801d944f700 [ 25.492550] R13: 0000000041b58ab3 R14: 0000000000000040 R15: 1ffff1003b289ec4 [ 25.492556] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009a4a840 [ 25.492559] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.492563] CR2: 0000559d28bdb100 CR3: 00000001d9422004 CR4: 00000000001606e0 [ 25.492571] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.492574] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.492576] Call Trace: [ 25.492585] ? lock_acquire+0x1d5/0x580 [ 25.492593] netlink_ack+0x120/0xa10 [ 25.492603] ? netlink_sendmsg+0xe60/0xe60 [ 25.492610] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.492618] ? netlink_deliver_tap+0x171/0xcf0 [ 25.492627] ? rcu_note_context_switch+0x710/0x710 [ 25.492637] netlink_rcv_skb+0x2d1/0x400 [ 25.492643] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 25.492650] ? netlink_ack+0xa10/0xa10 [ 25.492655] ? genl_rcv+0x19/0x40 [ 25.492663] ? __down_interruptible+0x6b0/0x6b0 [ 25.492671] ? netlink_skb_destructor+0x1d0/0x1d0 [ 25.492681] ? selinux_nlmsg_lookup+0x32b/0x430 [ 25.492690] genl_rcv+0x28/0x40 [ 25.492696] netlink_unicast+0x4ee/0x700 [ 25.492706] ? netlink_attachskb+0x8a0/0x8a0 [ 25.492717] ? security_netlink_send+0x81/0xb0 [ 25.492725] netlink_sendmsg+0xa4a/0xe60 [ 25.492737] ? netlink_unicast+0x700/0x700 [ 25.492746] ? security_socket_sendmsg+0x89/0xb0 [ 25.492752] ? netlink_unicast+0x700/0x700 [ 25.492760] sock_sendmsg+0xca/0x110 [ 25.492768] ___sys_sendmsg+0x767/0x8b0 [ 25.492775] ? do_raw_spin_trylock+0x190/0x190 [ 25.492784] ? copy_msghdr_from_user+0x590/0x590 [ 25.492795] ? _raw_spin_unlock+0x22/0x30 [ 25.492807] ? check_noncircular+0x20/0x20 [ 25.492813] ? __pmd_alloc+0x4e0/0x4e0 [ 25.492820] ? lock_release+0xa40/0xa40 [ 25.492827] ? __fget_light+0x297/0x380 [ 25.492835] ? fget_raw+0x20/0x20 [ 25.492847] ? handle_mm_fault+0x248/0x8d0 [ 25.492855] ? find_held_lock+0x35/0x1d0 [ 25.492873] __sys_sendmsg+0xe5/0x210 [ 25.492878] ? __sys_sendmsg+0xe5/0x210 [ 25.492885] ? SyS_shutdown+0x290/0x290 [ 25.492891] ? handle_mm_fault+0x410/0x8d0 [ 25.492899] ? __do_page_fault+0x32d/0xc90 [ 25.492906] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.492913] ? vmacache_find+0x5f/0x280 [ 25.492937] compat_SyS_sendmsg+0x2a/0x40 [ 25.492944] ? compat_SyS_getsockopt+0x420/0x420 [ 25.492951] do_fast_syscall_32+0x3ee/0xf9d [ 25.492963] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.492970] ? kasan_check_read+0x11/0x20 [ 25.492978] ? syscall_return_slowpath+0x550/0x550 [ 25.492986] ? SyS_rt_sigaction+0x94/0x1b0 [ 25.492994] ? SyS_sigprocmask+0x4b0/0x4b0 [ 25.493000] ? SyS_read+0x184/0x220 [ 25.493010] ? retint_user+0x18/0x18 [ 25.493021] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.493032] entry_SYSENTER_compat+0x54/0x63 [ 25.493038] RIP: 0023:0xf7f50c79 [ 25.493041] RSP: 002b:00000000ffc3d0cc EFLAGS: 00000286 ORIG_RAX: 0000000000000172 [ 25.493047] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020008000 [ 25.493050] RDX: 0000000000000000 RSI: 00000000080ea00c RDI: 000000000000003f [ 25.493054] RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000 [ 25.493057] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.493060] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.493075] Code: 37 ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 f9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 f8 48 89 e5 41 54 53 48 83 ec 08 <0f> b6 14 11 48 89 f9 83 e1 07 38 ca 7f 04 84 d2 75 4b 80 38 00 [ 25.493194] RIP: strlen+0x1f/0xa0 RSP: ffff8801d944f5c8 [ 25.493234] ---[ end trace 94a9380d9eae7fdf ]--- [ 25.493238] Kernel panic - not syncing: Fatal exception [ 25.515877] Dumping ftrace buffer: [ 25.515880] (ftrace buffer empty) [ 25.515883] Kernel Offset: disabled [ 25.955606] Rebooting in 86400 seconds..