[....] Starting enhanced syslogd: rsyslogd[ 12.785845] audit: type=1400 audit(1516972035.476:5): avc: denied { syslog } for pid=3499 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: [ 19.145403] audit: type=1400 audit(1516972041.836:6): avc: denied { map } for pid=3639 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 '10.128.0.62' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 25.354807] audit: type=1400 audit(1516972048.045:7): avc: denied { map } for pid=3653 comm="syzkaller845255" path="/root/syzkaller845255196" 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 [ 25.713215] ip (3719) used greatest stack depth: 16224 bytes left [ 25.747307] 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 [ 26.083435] WARNING: CPU: 0 PID: 3653 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 [ 26.091334] Kernel panic - not syncing: panic_on_warn set ... [ 26.091334] [ 26.098676] CPU: 0 PID: 3653 Comm: syzkaller845255 Not tainted 4.15.0-rc9+ #191 [ 26.106092] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.115420] Call Trace: [ 26.117985] dump_stack+0x194/0x257 [ 26.121595] ? arch_local_irq_restore+0x53/0x53 [ 26.126242] ? vsnprintf+0x1ed/0x1900 [ 26.130031] panic+0x1e4/0x41c [ 26.133199] ? refcount_error_report+0x214/0x214 [ 26.137930] ? show_regs_print_info+0x18/0x18 [ 26.142401] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.147393] ? __warn+0x1c1/0x200 [ 26.150823] ? kmalloc_slab+0x5d/0x70 [ 26.154598] __warn+0x1dc/0x200 [ 26.157858] ? kmalloc_slab+0x5d/0x70 [ 26.161637] report_bug+0x211/0x2d0 [ 26.165247] fixup_bug.part.11+0x37/0x80 [ 26.169286] do_error_trap+0x2d7/0x3e0 [ 26.173146] ? netlink_sendmsg+0xa4a/0xe60 [ 26.177360] ? sock_sendmsg+0xca/0x110 [ 26.181222] ? ___sys_sendmsg+0x767/0x8b0 [ 26.185352] ? math_error+0x400/0x400 [ 26.189125] ? check_noncircular+0x20/0x20 [ 26.193333] ? print_irqtrace_events+0x270/0x270 [ 26.198068] ? __lock_is_held+0xb6/0x140 [ 26.202107] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.206929] do_invalid_op+0x1b/0x20 [ 26.210617] invalid_op+0x22/0x40 [ 26.214045] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 26.218424] RSP: 0018:ffff8801d9b467a0 EFLAGS: 00010246 [ 26.223760] RAX: 0000000000000000 RBX: 00000007fffffff8 RCX: ffffffff83b2f03f [ 26.231000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000007fffffff8 [ 26.238247] RBP: ffff8801d9b467a0 R08: 1ffff1003b368c67 R09: 0000000000000000 [ 26.245490] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 26.252730] R13: 0000000000000000 R14: 00000000014080c0 R15: ffff8801d4915080 [ 26.259989] ? tun_device_event+0x3bf/0xcb0 [ 26.264296] __kmalloc+0x25/0x760 [ 26.267729] ? tun_device_event+0x3d3/0xcb0 [ 26.272036] tun_device_event+0x3d3/0xcb0 [ 26.276158] ? sel_netif_destroy+0x250/0x250 [ 26.280546] ? lockdep_rtnl_is_held+0x1a/0x30 [ 26.285032] notifier_call_chain+0x136/0x2c0 [ 26.289421] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 26.294854] ? print_irqtrace_events+0x270/0x270 [ 26.299587] ? rtnl_is_locked+0x54/0xb0 [ 26.303536] ? rtnl_kfree_skbs+0x70/0x70 [ 26.307590] raw_notifier_call_chain+0x2d/0x40 [ 26.312152] call_netdevice_notifiers_info+0x32/0x60 [ 26.317230] call_netdevice_notifiers+0xac/0x100 [ 26.321965] ? call_netdevice_notifiers_info+0x60/0x60 [ 26.327229] do_setlink+0xc10/0x3b30 [ 26.330934] ? bpf_prog_kallsyms_find+0xbd/0x440 [ 26.335673] ? rtnl_fdb_del+0xb20/0xb20 [ 26.339629] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 26.344797] ? print_irqtrace_events+0x270/0x270 [ 26.349526] ? print_irqtrace_events+0x270/0x270 [ 26.354264] ? update_load_avg+0x249/0x2d80 [ 26.358566] ? print_irqtrace_events+0x270/0x270 [ 26.363302] ? print_irqtrace_events+0x270/0x270 [ 26.368039] ? lock_pin_lock+0x360/0x360 [ 26.372078] ? print_irqtrace_events+0x270/0x270 [ 26.376807] ? __lock_acquire+0x664/0x3e00 [ 26.381019] ? print_irqtrace_events+0x270/0x270 [ 26.385754] ? print_irqtrace_events+0x270/0x270 [ 26.390486] ? print_irqtrace_events+0x270/0x270 [ 26.395216] ? __lock_acquire+0x664/0x3e00 [ 26.399437] ? rtnl_is_locked+0x54/0xb0 [ 26.403386] ? validate_linkmsg+0x5f0/0x8e0 [ 26.407686] ? rtnl_calcit.isra.25+0x4f0/0x4f0 [ 26.412246] ? netdev_master_upper_dev_get+0x157/0x200 [ 26.417495] ? __dev_get_by_flags+0x180/0x180 [ 26.421970] rtnl_newlink+0xf5a/0x1ab0 [ 26.425834] ? __mutex_lock+0x16f/0x1a80 [ 26.429883] ? rtnl_link_unregister+0x330/0x330 [ 26.434530] ? avc_has_extended_perms+0x12c0/0x12c0 [ 26.439532] ? check_noncircular+0x20/0x20 [ 26.443786] ? __lock_is_held+0xb6/0x140 [ 26.447843] ? rtnl_link_unregister+0x330/0x330 [ 26.452485] rtnetlink_rcv_msg+0x733/0x1020 [ 26.456786] ? validate_linkmsg+0x8e0/0x8e0 [ 26.461091] ? check_noncircular+0x20/0x20 [ 26.465304] ? find_held_lock+0x35/0x1d0 [ 26.469352] ? netlink_lookup+0x5f7/0xa90 [ 26.473473] ? lock_downgrade+0x980/0x980 [ 26.477601] ? find_held_lock+0x35/0x1d0 [ 26.481646] ? rtnl_link_unregister+0x330/0x330 [ 26.486293] ? netlink_deliver_tap+0x148/0xcf0 [ 26.490850] ? lock_downgrade+0x980/0x980 [ 26.494973] ? lock_release+0xa40/0xa40 [ 26.498917] ? netlink_lookup+0x620/0xa90 [ 26.503045] ? rtnl_link_unregister+0x330/0x330 [ 26.508438] ? netlink_deliver_tap+0x171/0xcf0 [ 26.512998] netlink_rcv_skb+0x14b/0x380 [ 26.517046] ? validate_linkmsg+0x8e0/0x8e0 [ 26.521343] ? netlink_ack+0xa10/0xa10 [ 26.525206] ? netlink_skb_destructor+0x1d0/0x1d0 [ 26.530038] rtnetlink_rcv+0x1c/0x20 [ 26.533726] netlink_unicast+0x4ee/0x700 [ 26.537764] ? netlink_attachskb+0x8a0/0x8a0 [ 26.542151] ? security_netlink_send+0x81/0xb0 [ 26.546706] netlink_sendmsg+0xa4a/0xe60 [ 26.550748] ? netlink_unicast+0x700/0x700 [ 26.554958] ? security_socket_sendmsg+0x89/0xb0 [ 26.559686] ? netlink_unicast+0x700/0x700 [ 26.563900] sock_sendmsg+0xca/0x110 [ 26.567600] ___sys_sendmsg+0x767/0x8b0 [ 26.571552] ? SyS_membarrier+0x600/0x600 [ 26.575688] ? copy_msghdr_from_user+0x590/0x590 [ 26.580416] ? check_noncircular+0x20/0x20 [ 26.584635] ? check_noncircular+0x20/0x20 [ 26.588843] ? __pmd_alloc+0x4e0/0x4e0 [ 26.592706] ? __fget_light+0x297/0x380 [ 26.596656] ? fget_raw+0x20/0x20 [ 26.600090] ? handle_mm_fault+0x248/0x8d0 [ 26.604301] ? find_held_lock+0x35/0x1d0 [ 26.608355] __sys_sendmsg+0xe5/0x210 [ 26.612132] ? __sys_sendmsg+0xe5/0x210 [ 26.616089] ? SyS_shutdown+0x290/0x290 [ 26.620041] ? handle_mm_fault+0x410/0x8d0 [ 26.624248] ? __do_page_fault+0x32d/0xc90 [ 26.628456] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.633014] ? vmacache_find+0x5f/0x280 [ 26.636994] compat_SyS_sendmsg+0x2a/0x40 [ 26.641120] ? compat_SyS_getsockopt+0x420/0x420 [ 26.645853] do_fast_syscall_32+0x3ee/0xf9d [ 26.650153] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.654713] ? kasan_check_read+0x11/0x20 [ 26.658854] ? syscall_return_slowpath+0x550/0x550 [ 26.663760] ? SyS_rt_sigaction+0x94/0x1b0 [ 26.667966] ? SyS_sigprocmask+0x4b0/0x4b0 [ 26.672174] ? SyS_read+0x184/0x220 [ 26.675773] ? retint_user+0x18/0x18 [ 26.679467] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.684290] entry_SYSENTER_compat+0x54/0x63 [ 26.688683] RIP: 0023:0xf7f81c79 [ 26.692023] RSP: 002b:00000000ff967bcc EFLAGS: 00000207 ORIG_RAX: 0000000000000172 [ 26.699712] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020504000 [ 26.706956] RDX: 0000000000000004 RSI: 0000000000000167 RDI: 0000000000000010 [ 26.714199] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 [ 26.721451] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.728694] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.736564] Dumping ftrace buffer: [ 26.740176] (ftrace buffer empty) [ 26.743859] Kernel Offset: disabled [ 26.747463] Rebooting in 86400 seconds..