[....] Starting enhanced syslogd: rsyslogd[ 12.292475] audit: type=1400 audit(1515468933.898:5): avc: denied { syslog } for pid=3344 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 17.169398] audit: type=1400 audit(1515468938.775:6): avc: denied { map } for pid=3483 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 '10.128.0.4' (ECDSA) to the list of known hosts. executing program [ 23.368523] audit: type=1400 audit(1515468944.974:7): avc: denied { map } for pid=3498 comm="syzkaller476379" path="/root/syzkaller476379690" 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 [ 23.372518] WARNING: CPU: 1 PID: 3498 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 23.372530] Kernel panic - not syncing: panic_on_warn set ... [ 23.372530] [ 23.372539] CPU: 1 PID: 3498 Comm: syzkaller476379 Not tainted 4.15.0-rc6-mm1+ #52 [ 23.372542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.372545] Call Trace: [ 23.372558] dump_stack+0x194/0x257 [ 23.372571] ? arch_local_irq_restore+0x53/0x53 [ 23.372586] ? vsnprintf+0x1ed/0x1900 [ 23.372603] panic+0x1e4/0x41c [ 23.372611] ? refcount_error_report+0x214/0x214 [ 23.372622] ? show_regs_print_info+0x18/0x18 [ 23.372640] ? __warn+0x1c1/0x200 [ 23.372654] ? kmalloc_slab+0x5d/0x70 [ 23.372660] __warn+0x1dc/0x200 [ 23.372669] ? kmalloc_slab+0x5d/0x70 [ 23.372680] report_bug+0x211/0x2d0 [ 23.372697] fixup_bug.part.11+0x37/0x80 [ 23.372706] do_error_trap+0x2d7/0x3e0 [ 23.372719] ? math_error+0x400/0x400 [ 23.372728] ? rcu_read_lock_held+0xa9/0xc0 [ 23.372737] ? xfrm_state_get_afinfo+0x138/0x280 [ 23.372762] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.372778] do_invalid_op+0x1b/0x20 [ 23.372785] invalid_op+0x22/0x40 [ 23.372792] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 23.372796] RSP: 0018:ffff8801c146f450 EFLAGS: 00010246 [ 23.372803] RAX: 0000000000000000 RBX: ffff8801c07ad200 RCX: ffffffff84b1a7bc [ 23.372807] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000fffffa60 [ 23.372812] RBP: ffff8801c146f450 R08: 0000000000000000 R09: 1ffff1003828de4d [ 23.372816] R10: ffff8801c146f1a0 R11: 0000000000000001 R12: 00000000fffffa60 [ 23.372820] R13: 00000000fffffa60 R14: 00000000014080c0 R15: ffff8801c07ad680 [ 23.372840] ? xfrm_add_sa+0x1b6c/0x33e0 [ 23.372857] __kmalloc+0x25/0x760 [ 23.372865] ? xfrm_get_mode.part.29+0x260/0x260 [ 23.372870] ? xfrm_find_algo+0x1c4/0x270 [ 23.372883] ? xfrm_add_sa+0x1b79/0x33e0 [ 23.372898] xfrm_add_sa+0x1b79/0x33e0 [ 23.372923] ? xfrm_send_state_notify+0x1c50/0x1c50 [ 23.372934] ? nla_parse+0x29a/0x3d0 [ 23.372948] ? nla_validate+0x1c0/0x1c0 [ 23.372961] ? __netlink_ns_capable+0xe1/0x120 [ 23.372972] ? xfrm_send_state_notify+0x1c50/0x1c50 [ 23.372981] xfrm_user_rcv_msg+0x422/0x860 [ 23.372988] ? xfrm_user_rcv_msg+0x422/0x860 [ 23.373006] ? xfrm_dump_sa_done+0xe0/0xe0 [ 23.373015] ? lock_downgrade+0x980/0x980 [ 23.373029] ? lock_release+0xa40/0xa40 [ 23.373084] ? netlink_tap_init_net+0x350/0x350 [ 23.373099] netlink_rcv_skb+0x224/0x470 [ 23.373107] ? xfrm_dump_sa_done+0xe0/0xe0 [ 23.373118] ? netlink_ack+0xa10/0xa10 [ 23.373132] ? netlink_skb_destructor+0x1d0/0x1d0 [ 23.373151] xfrm_netlink_rcv+0x6f/0x90 [ 23.373161] netlink_unicast+0x4c4/0x6b0 [ 23.373178] ? netlink_attachskb+0x8a0/0x8a0 [ 23.373196] ? security_netlink_send+0x81/0xb0 [ 23.373209] netlink_sendmsg+0xa4a/0xe60 [ 23.373228] ? netlink_unicast+0x6b0/0x6b0 [ 23.373243] ? security_socket_sendmsg+0x89/0xb0 [ 23.373251] ? netlink_unicast+0x6b0/0x6b0 [ 23.373264] sock_sendmsg+0xca/0x110 [ 23.373276] ___sys_sendmsg+0x767/0x8b0 [ 23.373292] ? copy_msghdr_from_user+0x590/0x590 [ 23.373315] ? __do_page_fault+0x5f7/0xc90 [ 23.373325] ? lock_downgrade+0x980/0x980 [ 23.373345] ? __fget_light+0x297/0x380 [ 23.373356] ? fget_raw+0x20/0x20 [ 23.373366] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.373372] ? vmacache_find+0x5f/0x280 [ 23.373379] ? vmacache_update+0xfe/0x130 [ 23.373396] ? up_read+0x1a/0x40 [ 23.373404] ? __do_page_fault+0x3d6/0xc90 [ 23.373411] ? get_unused_fd_flags+0x190/0x190 [ 23.373430] ? __fdget+0x18/0x20 [ 23.373445] __sys_sendmsg+0xe5/0x210 [ 23.373451] ? __sys_sendmsg+0xe5/0x210 [ 23.373462] ? SyS_shutdown+0x290/0x290 [ 23.373474] ? __do_page_fault+0xc90/0xc90 [ 23.373488] ? fd_install+0x4d/0x60 [ 23.373514] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.373531] SyS_sendmsg+0x2d/0x50 [ 23.373541] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.373547] RIP: 0033:0x440029 [ 23.373551] RSP: 002b:00007ffcd7b3a598 EFLAGS: 00000203 ORIG_RAX: 000000000000002e [ 23.373558] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 23.373561] RDX: 0000000000000000 RSI: 0000000020004000 RDI: 0000000000000003 [ 23.373565] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 23.373569] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401990 [ 23.373573] R13: 0000000000401a20 R14: 0000000000000000 R15: 0000000000000000 [ 23.394888] Dumping ftrace buffer: [ 23.394958] (ftrace buffer empty) [ 23.394961] Kernel Offset: disabled [ 23.819114] Rebooting in 86400 seconds..