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-386-4,10.128.0.46' (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: [ 24.949962] netlink: 13 bytes leftover after parsing attributes in process `syzkaller460046'. [ 24.958783] ------------[ cut here ]------------ [ 24.964266] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 24.972277] Kernel panic - not syncing: panic_on_warn set ... [ 24.972277] [ 24.979619] CPU: 1 PID: 2981 Comm: syzkaller460046 Not tainted 4.14.0-rc2+ #12 [ 24.986951] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.996277] Call Trace: [ 24.998839] dump_stack+0x194/0x257 [ 25.002440] ? arch_local_irq_restore+0x53/0x53 [ 25.007091] panic+0x1e4/0x417 [ 25.010256] ? __warn+0x1d9/0x1d9 [ 25.013681] ? show_regs_print_info+0x65/0x65 [ 25.018160] ? kmalloc_slab+0x5d/0x70 [ 25.021931] __warn+0x1c4/0x1d9 [ 25.025183] ? kmalloc_slab+0x5d/0x70 [ 25.028955] report_bug+0x211/0x2d0 [ 25.032563] fixup_bug+0x40/0x90 [ 25.035901] do_trap+0x260/0x390 [ 25.039244] do_error_trap+0x120/0x390 [ 25.043100] ? rtnetlink_rcv+0x1c/0x20 [ 25.046959] ? netlink_unicast+0x4e8/0x6f0 [ 25.051161] ? netlink_sendmsg+0xa4a/0xe70 [ 25.055368] ? do_trap+0x390/0x390 [ 25.058880] ? kmalloc_slab+0x5d/0x70 [ 25.062658] ? __lock_is_held+0xbc/0x140 [ 25.066697] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.071517] do_invalid_op+0x1b/0x20 [ 25.075204] invalid_op+0x18/0x20 [ 25.078630] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 25.083004] RSP: 0018:ffff8801ce446918 EFLAGS: 00010246 [ 25.088342] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 25.095583] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700018 [ 25.102823] RBP: ffff8801ce446918 R08: 00000000000000e0 R09: 0000000000000000 [ 25.110061] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000700018 [ 25.117302] R13: dffffc0000000000 R14: 00000000014080c0 R15: ffff8801ce215800 [ 25.124572] __kmalloc+0x25/0x760 [ 25.128014] ? tun_device_event+0x3d3/0xcd0 [ 25.132313] tun_device_event+0x3d3/0xcd0 [ 25.136433] ? sel_netif_destroy+0x250/0x250 [ 25.140824] ? ipmr_device_event+0x27/0x1d0 [ 25.145125] notifier_call_chain+0x136/0x2c0 [ 25.149509] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 25.154931] ? dev_set_rx_mode+0x2f/0x40 [ 25.158967] ? __dev_change_flags+0x643/0x990 [ 25.163437] ? __dev_notify_flags+0x155/0x2e0 [ 25.167906] ? rtnl_is_locked+0x54/0xb0 [ 25.171852] ? rtnl_kfree_skbs+0x70/0x70 [ 25.175889] raw_notifier_call_chain+0x2d/0x40 [ 25.180445] call_netdevice_notifiers_info+0x51/0x90 [ 25.185519] call_netdevice_notifiers+0x6a/0x90 [ 25.190169] ? call_netdevice_notifiers_info+0x90/0x90 [ 25.195418] ? dev_change_flags+0xfa/0x140 [ 25.199632] do_setlink+0xbeb/0x38d0 [ 25.203317] ? console_unlock+0x69c/0xd80 [ 25.207439] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.212432] ? rtnl_register+0x70/0x70 [ 25.216296] ? devkmsg_poll+0x1e0/0x1e0 [ 25.220243] ? wake_up_klogd+0x100/0x100 [ 25.224272] ? vprintk_emit+0x49b/0x590 [ 25.228222] ? __down_trylock_console_sem+0x10d/0x1e0 [ 25.233388] ? vprintk_emit+0x3ea/0x590 [ 25.237344] ? vprintk_default+0x28/0x30 [ 25.241376] ? vprintk_func+0x5e/0xc0 [ 25.245147] ? printk+0xaa/0xca [ 25.248397] ? show_regs_print_info+0x65/0x65 [ 25.252866] ? idr_get_free_cmn+0xfd0/0xfd0 [ 25.257157] ? mutex_lock_io_nested+0x1880/0x1880 [ 25.261982] ? nla_parse+0x29a/0x3d0 [ 25.265672] ? nla_validate+0x1c0/0x1c0 [ 25.269614] ? unwind_get_return_address+0x61/0xa0 [ 25.274519] ? validate_linkmsg+0x31b/0x4e0 [ 25.278817] rtnl_setlink+0x270/0x3c0 [ 25.282595] ? do_setlink+0x38d0/0x38d0 [ 25.286554] ? find_held_lock+0x39/0x1d0 [ 25.290635] ? do_setlink+0x38d0/0x38d0 [ 25.294580] rtnetlink_rcv_msg+0x733/0x1090 [ 25.298871] ? check_noncircular+0x20/0x20 [ 25.303084] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 25.307653] ? find_held_lock+0x39/0x1d0 [ 25.311696] ? lock_downgrade+0x990/0x990 [ 25.315823] ? do_setlink+0x38d0/0x38d0 [ 25.319778] ? lock_release+0xd70/0xd70 [ 25.323727] ? netlink_lookup+0x620/0xa90 [ 25.327862] ? do_setlink+0x38d0/0x38d0 [ 25.331808] ? netlink_connect+0x4e0/0x4e0 [ 25.336022] ? netlink_deliver_tap+0x176/0xa60 [ 25.340577] ? iov_iter_advance+0x2a1/0x13f0 [ 25.344957] ? sock_has_perm+0x29c/0x400 [ 25.348990] netlink_rcv_skb+0x216/0x440 [ 25.353022] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 25.357582] ? netlink_ack+0xab0/0xab0 [ 25.361443] ? netlink_skb_destructor+0x1d0/0x1d0 [ 25.366258] ? selinux_nlmsg_lookup+0x32b/0x430 [ 25.370903] rtnetlink_rcv+0x1c/0x20 [ 25.374588] netlink_unicast+0x4e8/0x6f0 [ 25.378626] ? netlink_attachskb+0x8a0/0x8a0 [ 25.383012] ? security_netlink_send+0x81/0xb0 [ 25.387572] netlink_sendmsg+0xa4a/0xe70 [ 25.391617] ? netlink_unicast+0x6f0/0x6f0 [ 25.395829] ? security_socket_sendmsg+0x89/0xb0 [ 25.400563] ? netlink_unicast+0x6f0/0x6f0 [ 25.404784] sock_sendmsg+0xca/0x110 [ 25.408472] sock_write_iter+0x320/0x5e0 [ 25.412508] ? sock_sendmsg+0x110/0x110 [ 25.416467] ? selinux_capset+0x100/0x100 [ 25.420586] ? __might_sleep+0x6c/0x190 [ 25.424541] do_iter_readv_writev+0x531/0x7f0 [ 25.429014] ? vfs_dedupe_file_range+0x900/0x900 [ 25.433748] ? rw_verify_area+0xe5/0x2b0 [ 25.437795] do_iter_write+0x15a/0x540 [ 25.441659] ? iov_iter_get_pages+0x1150/0x1150 [ 25.446314] compat_writev+0x225/0x420 [ 25.450173] ? __fget_light+0x29d/0x390 [ 25.454123] ? do_pwritev+0x1a0/0x1a0 [ 25.457895] ? find_held_lock+0x39/0x1d0 [ 25.461938] ? lock_downgrade+0x990/0x990 [ 25.466063] ? __fdget_pos+0x136/0x1a0 [ 25.469923] ? __fdget_raw+0x20/0x20 [ 25.473622] do_compat_writev+0x115/0x220 [ 25.477742] ? do_compat_writev+0x115/0x220 [ 25.482041] ? compat_writev+0x420/0x420 [ 25.486085] compat_SyS_writev+0x26/0x30 [ 25.490120] ? compat_SyS_preadv2+0x90/0x90 [ 25.494417] do_fast_syscall_32+0x3f2/0xf05 [ 25.498718] ? do_int80_syscall_32+0x940/0x940 [ 25.503278] ? lockdep_sys_exit+0x47/0xf0 [ 25.507399] ? syscall_return_slowpath+0x2b3/0x510 [ 25.512298] ? finish_task_switch+0x1aa/0x740 [ 25.516765] ? lockdep_sys_exit+0x47/0xf0 [ 25.520893] ? retint_user+0x18/0x20 [ 25.524584] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.529405] entry_SYSENTER_compat+0x51/0x60 [ 25.533781] RIP: 0023:0xf7f93c79 [ 25.537114] RSP: 002b:000000000820fe3c EFLAGS: 00000207 ORIG_RAX: 0000000000000092 [ 25.544797] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001ff0 [ 25.552037] RDX: 0000000000000001 RSI: 0000000000000167 RDI: 0000000000000010 [ 25.559277] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 25.566522] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.573763] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.581529] Dumping ftrace buffer: [ 25.585104] (ftrace buffer empty) [ 25.588789] Kernel Offset: disabled [ 25.592394] Rebooting in 86400 seconds..