[....] Starting enhanced syslogd: rsyslogd[ 13.098440] audit: type=1400 audit(1516802073.904:5): avc: denied { syslog } for pid=3497 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: [ 18.215816] audit: type=1400 audit(1516802079.021:6): avc: denied { map } for pid=3638 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 '10.128.0.13' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 24.437117] audit: type=1400 audit(1516802085.242:7): avc: denied { map } for pid=3652 comm="syzkaller736432" path="/root/syzkaller736432116" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 24.823823] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 25.166866] WARNING: CPU: 0 PID: 3652 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 25.174756] Kernel panic - not syncing: panic_on_warn set ... [ 25.174756] [ 25.182098] CPU: 0 PID: 3652 Comm: syzkaller736432 Not tainted 4.15.0-rc9+ #187 [ 25.189516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.198841] Call Trace: [ 25.201401] dump_stack+0x194/0x257 [ 25.205004] ? arch_local_irq_restore+0x53/0x53 [ 25.209662] ? vsnprintf+0x1ed/0x1900 [ 25.213439] panic+0x1e4/0x41c [ 25.216604] ? refcount_error_report+0x214/0x214 [ 25.221333] ? show_regs_print_info+0x18/0x18 [ 25.225801] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.230795] ? __warn+0x1c1/0x200 [ 25.234223] ? kmalloc_slab+0x5d/0x70 [ 25.237998] __warn+0x1dc/0x200 [ 25.241256] ? kmalloc_slab+0x5d/0x70 [ 25.245036] report_bug+0x211/0x2d0 [ 25.248642] fixup_bug.part.11+0x37/0x80 [ 25.252678] do_error_trap+0x2d7/0x3e0 [ 25.256546] ? netlink_sendmsg+0xa4a/0xe60 [ 25.260751] ? sock_sendmsg+0xca/0x110 [ 25.264606] ? ___sys_sendmsg+0x767/0x8b0 [ 25.268725] ? math_error+0x400/0x400 [ 25.272497] ? check_noncircular+0x20/0x20 [ 25.276702] ? print_irqtrace_events+0x270/0x270 [ 25.281431] ? __lock_is_held+0xb6/0x140 [ 25.285467] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.290288] do_invalid_op+0x1b/0x20 [ 25.293974] invalid_op+0x22/0x40 [ 25.297400] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 25.301776] RSP: 0018:ffff8801d980e7a0 EFLAGS: 00010246 [ 25.307113] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 25.314356] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 25.321597] RBP: ffff8801d980e7a0 R08: 1ffff1003b301c67 R09: 0000000000000000 [ 25.328838] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 25.336079] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d53696c0 [ 25.343340] ? tun_device_event+0x3bf/0xcb0 [ 25.348199] __kmalloc+0x25/0x760 [ 25.351632] ? tun_device_event+0x3d3/0xcb0 [ 25.355936] tun_device_event+0x3d3/0xcb0 [ 25.360056] ? sel_netif_destroy+0x250/0x250 [ 25.364450] ? lockdep_rtnl_is_held+0x1a/0x30 [ 25.368924] notifier_call_chain+0x136/0x2c0 [ 25.373309] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 25.378735] ? print_irqtrace_events+0x270/0x270 [ 25.383462] ? rtnl_is_locked+0x54/0xb0 [ 25.387409] ? rtnl_kfree_skbs+0x70/0x70 [ 25.391451] raw_notifier_call_chain+0x2d/0x40 [ 25.396014] call_netdevice_notifiers_info+0x32/0x60 [ 25.401094] call_netdevice_notifiers+0xac/0x100 [ 25.405820] ? call_netdevice_notifiers_info+0x60/0x60 [ 25.411080] do_setlink+0xc10/0x3b30 [ 25.414776] ? rtnl_fdb_del+0xb20/0xb20 [ 25.418724] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.423886] ? print_irqtrace_events+0x270/0x270 [ 25.428613] ? print_irqtrace_events+0x270/0x270 [ 25.433341] ? mark_held_locks+0xaf/0x100 [ 25.437469] ? print_irqtrace_events+0x270/0x270 [ 25.442209] ? print_irqtrace_events+0x270/0x270 [ 25.446940] ? lock_pin_lock+0x360/0x360 [ 25.450978] ? print_irqtrace_events+0x270/0x270 [ 25.455714] ? __lock_acquire+0x664/0x3e00 [ 25.459917] ? print_irqtrace_events+0x270/0x270 [ 25.464648] ? print_irqtrace_events+0x270/0x270 [ 25.469378] ? print_irqtrace_events+0x270/0x270 [ 25.474103] ? __lock_acquire+0x664/0x3e00 [ 25.478318] ? rtnl_is_locked+0x54/0xb0 [ 25.482263] ? validate_linkmsg+0x5f0/0x8e0 [ 25.486558] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 25.491116] ? netdev_master_upper_dev_get+0x157/0x200 [ 25.496366] ? __dev_get_by_flags+0x180/0x180 [ 25.500831] ? rcu_note_context_switch+0x710/0x710 [ 25.505730] ? avc_has_perm_noaudit+0x355/0x520 [ 25.510375] rtnl_newlink+0xf5a/0x1ab0 [ 25.514234] ? __mutex_lock+0x16f/0x1a80 [ 25.518281] ? rtnl_link_unregister+0x330/0x330 [ 25.522925] ? avc_has_extended_perms+0x12c0/0x12c0 [ 25.527922] ? check_noncircular+0x20/0x20 [ 25.532164] ? lock_release+0xa40/0xa40 [ 25.536112] ? __lock_is_held+0xb6/0x140 [ 25.540149] ? rtnl_link_unregister+0x330/0x330 [ 25.544787] rtnetlink_rcv_msg+0x733/0x1020 [ 25.549084] ? validate_linkmsg+0x8e0/0x8e0 [ 25.553387] ? check_noncircular+0x20/0x20 [ 25.557598] ? find_held_lock+0x35/0x1d0 [ 25.561634] ? netlink_lookup+0x5f7/0xa90 [ 25.565754] ? lock_downgrade+0x980/0x980 [ 25.569874] ? find_held_lock+0x35/0x1d0 [ 25.573908] ? rtnl_link_unregister+0x330/0x330 [ 25.578544] ? netlink_deliver_tap+0x148/0xcf0 [ 25.583097] ? lock_downgrade+0x980/0x980 [ 25.587220] ? lock_release+0xa40/0xa40 [ 25.591162] ? netlink_lookup+0x620/0xa90 [ 25.595282] ? rtnl_link_unregister+0x330/0x330 [ 25.599935] ? netlink_deliver_tap+0x171/0xcf0 [ 25.604496] netlink_rcv_skb+0x14b/0x380 [ 25.608529] ? validate_linkmsg+0x8e0/0x8e0 [ 25.612823] ? netlink_ack+0xa10/0xa10 [ 25.616688] ? netlink_skb_destructor+0x1d0/0x1d0 [ 25.621513] rtnetlink_rcv+0x1c/0x20 [ 25.625208] netlink_unicast+0x4ee/0x700 [ 25.629244] ? netlink_attachskb+0x8a0/0x8a0 [ 25.633631] ? security_netlink_send+0x81/0xb0 [ 25.638184] netlink_sendmsg+0xa4a/0xe60 [ 25.642221] ? netlink_unicast+0x700/0x700 [ 25.646432] ? security_socket_sendmsg+0x89/0xb0 [ 25.651158] ? netlink_unicast+0x700/0x700 [ 25.655366] sock_sendmsg+0xca/0x110 [ 25.659061] ___sys_sendmsg+0x767/0x8b0 [ 25.663018] ? copy_msghdr_from_user+0x590/0x590 [ 25.667752] ? check_noncircular+0x20/0x20 [ 25.671961] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.677826] ? check_noncircular+0x20/0x20 [ 25.682037] ? __pmd_alloc+0x4e0/0x4e0 [ 25.685899] ? __might_fault+0x188/0x1d0 [ 25.689932] ? __fget_light+0x297/0x380 [ 25.693878] ? fget_raw+0x20/0x20 [ 25.697307] ? handle_mm_fault+0x248/0x8d0 [ 25.701516] ? find_held_lock+0x35/0x1d0 [ 25.705564] __sys_sendmsg+0xe5/0x210 [ 25.709337] ? __sys_sendmsg+0xe5/0x210 [ 25.713290] ? SyS_shutdown+0x290/0x290 [ 25.717232] ? handle_mm_fault+0x410/0x8d0 [ 25.721441] ? __do_page_fault+0x32d/0xc90 [ 25.725647] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.730197] ? vmacache_find+0x5f/0x280 [ 25.734163] compat_SyS_sendmsg+0x2a/0x40 [ 25.738281] ? compat_SyS_getsockopt+0x420/0x420 [ 25.743014] do_fast_syscall_32+0x3ee/0xf9d [ 25.747317] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.751877] ? kasan_check_read+0x11/0x20 [ 25.755996] ? syscall_return_slowpath+0x550/0x550 [ 25.760906] ? SyS_rt_sigaction+0x94/0x1b0 [ 25.765113] ? SyS_sigprocmask+0x4b0/0x4b0 [ 25.769315] ? SyS_read+0x184/0x220 [ 25.772913] ? retint_user+0x18/0x18 [ 25.776603] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.781420] entry_SYSENTER_compat+0x54/0x63 [ 25.785798] RIP: 0023:0xf7fcfc79 [ 25.789134] RSP: 002b:00000000ffcdf29c EFLAGS: 00000213 ORIG_RAX: 0000000000000172 [ 25.796901] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020bf6000 [ 25.804149] RDX: 0000000000000000 RSI: 00000000080c0370 RDI: 00000000ffcdf41c [ 25.811390] RBP: 000000000000834c R08: 0000000000000000 R09: 0000000000000000 [ 25.818632] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.825874] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.833863] Dumping ftrace buffer: [ 25.837480] (ftrace buffer empty) [ 25.841161] Kernel Offset: disabled [ 25.844763] Rebooting in 86400 seconds..