INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-7,10.128.15.194' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program syzkaller login: [ 32.293440] netlink: 13 bytes leftover after parsing attributes in process `syzkaller993473'. [ 32.295956] ------------[ cut here ]------------ [ 32.297369] WARNING: CPU: 1 PID: 3004 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 32.299455] Kernel panic - not syncing: panic_on_warn set ... [ 32.299455] [ 32.301392] CPU: 1 PID: 3004 Comm: syzkaller993473 Not tainted 4.13.0-rc5+ #43 [ 32.303337] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.305851] Call Trace: [ 32.306528] dump_stack+0x194/0x257 [ 32.307487] ? arch_local_irq_restore+0x53/0x53 [ 32.308718] panic+0x1e4/0x417 [ 32.309567] ? __warn+0x1d9/0x1d9 [ 32.310548] ? show_regs_print_info+0x65/0x65 [ 32.311766] ? kmalloc_slab+0x5d/0x70 [ 32.312855] __warn+0x1c4/0x1d9 [ 32.314148] ? kmalloc_slab+0x5d/0x70 [ 32.317928] report_bug+0x211/0x2d0 [ 32.321537] fixup_bug+0x40/0x90 [ 32.324879] do_trap+0x260/0x390 [ 32.328260] do_error_trap+0x120/0x390 [ 32.332123] ? netlink_unicast+0x4e8/0x6f0 [ 32.336366] ? netlink_sendmsg+0xa4a/0xe60 [ 32.340576] ? sock_sendmsg+0xca/0x110 [ 32.344443] ? do_trap+0x390/0x390 [ 32.347962] ? kmalloc_slab+0x5d/0x70 [ 32.351764] ? __lock_is_held+0xb6/0x140 [ 32.355820] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.360644] do_invalid_op+0x1b/0x20 [ 32.364333] invalid_op+0x1e/0x30 [ 32.367767] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 32.372146] RSP: 0018:ffff8801d0f3ed40 EFLAGS: 00010246 [ 32.377483] RAX: 0000000000000000 RBX: ffff8801d065e340 RCX: 0000000000000000 [ 32.384746] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700040 [ 32.391996] RBP: ffff8801d0f3ed40 R08: 0000000000000001 R09: 0000000000000000 [ 32.399242] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 32.406487] R13: 0000000000000001 R14: 00000000014080c0 R15: dffffc0000000000 [ 32.413773] __kmalloc+0x25/0x760 [ 32.417212] ? tun_device_event+0x3e9/0xca0 [ 32.421514] tun_device_event+0x3e9/0xca0 [ 32.425640] ? sel_netif_destroy+0x250/0x250 [ 32.430041] notifier_call_chain+0x136/0x2c0 [ 32.434430] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 32.439862] ? __dev_notify_flags+0x155/0x2e0 [ 32.444334] ? rtnl_is_locked+0x54/0xb0 [ 32.448289] ? rtnl_kfree_skbs+0x70/0x70 [ 32.452332] raw_notifier_call_chain+0x2d/0x40 [ 32.456894] call_netdevice_notifiers_info+0x51/0x90 [ 32.461976] call_netdevice_notifiers+0x6a/0x90 [ 32.466624] ? call_netdevice_notifiers_info+0x90/0x90 [ 32.471882] ? dev_change_flags+0xfa/0x140 [ 32.476096] do_setlink+0xbe5/0x38d0 [ 32.479787] ? console_unlock+0x69c/0xd80 [ 32.483947] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.488943] ? rtnl_unregister+0x150/0x150 [ 32.493156] ? devkmsg_poll+0x1c0/0x1e0 [ 32.497106] ? wake_up_klogd+0x100/0x100 [ 32.501140] ? vprintk_emit+0x49b/0x590 [ 32.505094] ? __down_trylock_console_sem+0x18b/0x1e0 [ 32.510260] ? __down_trylock_console_sem+0x10d/0x1e0 [ 32.515429] ? vprintk_emit+0x3ea/0x590 [ 32.519388] ? vprintk_default+0x28/0x30 [ 32.523533] ? vprintk_func+0x5e/0xc0 [ 32.527309] ? printk+0xaa/0xca [ 32.530563] ? show_regs_print_info+0x65/0x65 [ 32.535038] ? idr_get_free+0xff0/0xff0 [ 32.539004] ? nla_parse+0x29a/0x3d0 [ 32.542699] ? nla_validate+0x1c0/0x1c0 [ 32.546653] ? __might_sleep+0x95/0x190 [ 32.550607] ? validate_linkmsg+0x31b/0x4e0 [ 32.554923] rtnl_setlink+0x270/0x3c0 [ 32.558705] ? do_setlink+0x38d0/0x38d0 [ 32.562661] ? cred_has_capability+0x1a0/0x3d0 [ 32.567257] ? __netlink_ns_capable+0xe1/0x120 [ 32.571823] ? do_setlink+0x38d0/0x38d0 [ 32.575779] rtnetlink_rcv_msg+0x5ea/0x840 [ 32.580036] ? netlink_connect+0x4e0/0x4e0 [ 32.584252] ? rtnl_newlink+0x1b00/0x1b00 [ 32.588385] ? netlink_deliver_tap+0x176/0xa60 [ 32.592982] ? iov_iter_advance+0x2a1/0x13f0 [ 32.597369] ? sock_has_perm+0x29c/0x400 [ 32.601415] netlink_rcv_skb+0x216/0x440 [ 32.605458] ? rtnl_newlink+0x1b00/0x1b00 [ 32.609585] ? netlink_ack+0xab0/0xab0 [ 32.613453] ? netlink_skb_destructor+0x1d0/0x1d0 [ 32.618280] rtnetlink_rcv+0x2a/0x40 [ 32.621974] netlink_unicast+0x4e8/0x6f0 [ 32.626021] ? netlink_attachskb+0x8a0/0x8a0 [ 32.630416] ? security_netlink_send+0x81/0xb0 [ 32.634983] netlink_sendmsg+0xa4a/0xe60 [ 32.639031] ? netlink_unicast+0x6f0/0x6f0 [ 32.643247] ? security_socket_sendmsg+0x89/0xb0 [ 32.647979] ? netlink_unicast+0x6f0/0x6f0 [ 32.652210] sock_sendmsg+0xca/0x110 [ 32.655904] sock_write_iter+0x31a/0x5d0 [ 32.659943] ? sock_sendmsg+0x110/0x110 [ 32.663904] ? selinux_capset+0x100/0x100 [ 32.668028] ? __might_sleep+0x9c/0x190 [ 32.671985] do_iter_readv_writev+0x525/0x7f0 [ 32.676463] ? vfs_dedupe_file_range+0x900/0x900 [ 32.681203] ? rw_verify_area+0xe5/0x2b0 [ 32.685245] do_iter_write+0x154/0x540 [ 32.689114] ? dup_iter+0x260/0x260 [ 32.692720] ? __pmd_alloc+0x4e0/0x4e0 [ 32.696604] ? __lock_is_held+0xb6/0x140 [ 32.700646] vfs_writev+0x18a/0x340 [ 32.704249] ? __fget_light+0x297/0x380 [ 32.708203] ? vfs_iter_write+0xb0/0xb0 [ 32.712157] ? handle_mm_fault+0x23e/0x860 [ 32.716386] ? __fdget_pos+0x130/0x190 [ 32.720251] ? __fdget_raw+0x20/0x20 [ 32.723944] ? handle_mm_fault+0x4a2/0x860 [ 32.728194] ? down_read_trylock+0xdb/0x170 [ 32.732497] do_writev+0xfc/0x2a0 [ 32.735926] ? do_writev+0xfc/0x2a0 [ 32.739534] ? vfs_writev+0x340/0x340 [ 32.743309] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 32.748131] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.753129] SyS_writev+0x27/0x30 [ 32.756561] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.761291] RIP: 0033:0x4452d9 [ 32.764456] RSP: 002b:00000000007efe58 EFLAGS: 00000207 ORIG_RAX: 0000000000000014 [ 32.772138] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004452d9 [ 32.779385] RDX: 0000000000000001 RSI: 0000000020001ff0 RDI: 0000000000000004 [ 32.786631] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 32.793876] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000402930 [ 32.801122] R13: 00000000004029c0 R14: 0000000000000000 R15: 0000000000000000 [ 32.808874] Dumping ftrace buffer: [ 32.812434] (ftrace buffer empty) [ 32.816121] Kernel Offset: disabled [ 32.819724] Rebooting in 86400 seconds..