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-386-4,10.128.15.216' (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: [ 33.202630] netlink: 13 bytes leftover after parsing attributes in process `syzkaller775973'. [ 33.211424] ------------[ cut here ]------------ [ 33.216321] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 33.224225] Kernel panic - not syncing: panic_on_warn set ... [ 33.224225] [ 33.231566] CPU: 1 PID: 2981 Comm: syzkaller775973 Not tainted 4.14.0-rc2+ #13 [ 33.238895] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.248223] Call Trace: [ 33.250784] dump_stack+0x194/0x257 [ 33.254389] ? arch_local_irq_restore+0x53/0x53 [ 33.259049] panic+0x1e4/0x417 [ 33.262223] ? __warn+0x1d9/0x1d9 [ 33.265649] ? show_regs_print_info+0x65/0x65 [ 33.270131] ? kmalloc_slab+0x5d/0x70 [ 33.273905] __warn+0x1c4/0x1d9 [ 33.277158] ? kmalloc_slab+0x5d/0x70 [ 33.280932] report_bug+0x211/0x2d0 [ 33.284537] fixup_bug+0x40/0x90 [ 33.287879] do_trap+0x260/0x390 [ 33.291223] do_error_trap+0x120/0x390 [ 33.295079] ? rtnetlink_rcv+0x1c/0x20 [ 33.298936] ? netlink_unicast+0x4e8/0x6f0 [ 33.303140] ? netlink_sendmsg+0xa4a/0xe70 [ 33.307747] ? do_trap+0x390/0x390 [ 33.311259] ? kmalloc_slab+0x5d/0x70 [ 33.315038] ? __lock_is_held+0xbc/0x140 [ 33.319073] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.323893] do_invalid_op+0x1b/0x20 [ 33.327579] invalid_op+0x18/0x20 [ 33.331005] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 33.335384] RSP: 0018:ffff8801d075e918 EFLAGS: 00010246 [ 33.340722] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 33.347967] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700018 [ 33.355208] RBP: ffff8801d075e918 R08: 00000000000000e0 R09: 0000000000000000 [ 33.362446] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000700018 [ 33.369685] R13: dffffc0000000000 R14: 00000000014080c0 R15: ffff8801ce638d80 [ 33.376950] __kmalloc+0x25/0x760 [ 33.380388] ? tun_device_event+0x3d3/0xcd0 [ 33.384684] tun_device_event+0x3d3/0xcd0 [ 33.388809] ? sel_netif_destroy+0x250/0x250 [ 33.393200] ? ipmr_device_event+0x27/0x1d0 [ 33.397506] notifier_call_chain+0x136/0x2c0 [ 33.401897] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 33.407316] ? dev_set_rx_mode+0x2f/0x40 [ 33.411348] ? __dev_change_flags+0x643/0x990 [ 33.415815] ? __dev_notify_flags+0x155/0x2e0 [ 33.420284] ? rtnl_is_locked+0x54/0xb0 [ 33.424236] ? rtnl_kfree_skbs+0x70/0x70 [ 33.428273] raw_notifier_call_chain+0x2d/0x40 [ 33.432829] call_netdevice_notifiers_info+0x51/0x90 [ 33.437901] call_netdevice_notifiers+0x6a/0x90 [ 33.442540] ? call_netdevice_notifiers_info+0x90/0x90 [ 33.447789] ? dev_change_flags+0xfa/0x140 [ 33.452006] do_setlink+0xbeb/0x38d0 [ 33.455693] ? console_unlock+0x69c/0xd80 [ 33.459814] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.464804] ? rtnl_register+0x70/0x70 [ 33.468665] ? devkmsg_poll+0x1e0/0x1e0 [ 33.472609] ? wake_up_klogd+0x100/0x100 [ 33.476639] ? vprintk_emit+0x49b/0x590 [ 33.480585] ? __down_trylock_console_sem+0x10d/0x1e0 [ 33.485749] ? vprintk_emit+0x3ea/0x590 [ 33.489701] ? vprintk_default+0x28/0x30 [ 33.493732] ? vprintk_func+0x5e/0xc0 [ 33.497501] ? printk+0xaa/0xca [ 33.500749] ? show_regs_print_info+0x65/0x65 [ 33.505216] ? idr_get_free_cmn+0xfd0/0xfd0 [ 33.509507] ? mutex_lock_io_nested+0x1880/0x1880 [ 33.514331] ? nla_parse+0x29a/0x3d0 [ 33.518019] ? nla_validate+0x1c0/0x1c0 [ 33.521962] ? unwind_get_return_address+0x61/0xa0 [ 33.526866] ? validate_linkmsg+0x31b/0x4e0 [ 33.531158] rtnl_setlink+0x270/0x3c0 [ 33.534933] ? do_setlink+0x38d0/0x38d0 [ 33.538878] ? find_held_lock+0x39/0x1d0 [ 33.542954] ? do_setlink+0x38d0/0x38d0 [ 33.546909] rtnetlink_rcv_msg+0x733/0x1090 [ 33.551200] ? check_noncircular+0x20/0x20 [ 33.555409] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.559979] ? find_held_lock+0x39/0x1d0 [ 33.564021] ? lock_downgrade+0x990/0x990 [ 33.568145] ? do_setlink+0x38d0/0x38d0 [ 33.572096] ? lock_release+0xd70/0xd70 [ 33.576042] ? netlink_lookup+0x620/0xa90 [ 33.580166] ? do_setlink+0x38d0/0x38d0 [ 33.584108] ? netlink_connect+0x4e0/0x4e0 [ 33.588318] ? netlink_deliver_tap+0x176/0xa60 [ 33.592873] ? iov_iter_advance+0x2a1/0x13f0 [ 33.597252] ? sock_has_perm+0x29c/0x400 [ 33.601285] netlink_rcv_skb+0x216/0x440 [ 33.605314] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.609875] ? netlink_ack+0xab0/0xab0 [ 33.613743] ? netlink_skb_destructor+0x1d0/0x1d0 [ 33.618559] ? selinux_nlmsg_lookup+0x32b/0x430 [ 33.623201] rtnetlink_rcv+0x1c/0x20 [ 33.626883] netlink_unicast+0x4e8/0x6f0 [ 33.630918] ? netlink_attachskb+0x8a0/0x8a0 [ 33.635300] ? security_netlink_send+0x81/0xb0 [ 33.639853] netlink_sendmsg+0xa4a/0xe70 [ 33.643892] ? netlink_unicast+0x6f0/0x6f0 [ 33.648100] ? security_socket_sendmsg+0x89/0xb0 [ 33.652823] ? netlink_unicast+0x6f0/0x6f0 [ 33.657030] sock_sendmsg+0xca/0x110 [ 33.660719] sock_write_iter+0x320/0x5e0 [ 33.664754] ? sock_sendmsg+0x110/0x110 [ 33.668710] ? selinux_capset+0x100/0x100 [ 33.672830] ? __might_sleep+0x6c/0x190 [ 33.676781] do_iter_readv_writev+0x531/0x7f0 [ 33.681260] ? vfs_dedupe_file_range+0x900/0x900 [ 33.685994] ? rw_verify_area+0xe5/0x2b0 [ 33.690037] do_iter_write+0x15a/0x540 [ 33.693893] ? iov_iter_get_pages+0x1150/0x1150 [ 33.698544] compat_writev+0x225/0x420 [ 33.702406] ? __fget_light+0x29d/0x390 [ 33.706356] ? do_pwritev+0x1a0/0x1a0 [ 33.710128] ? find_held_lock+0x39/0x1d0 [ 33.714171] ? lock_downgrade+0x990/0x990 [ 33.718296] ? __fdget_pos+0x136/0x1a0 [ 33.722156] ? __fdget_raw+0x20/0x20 [ 33.725849] do_compat_writev+0x115/0x220 [ 33.729966] ? do_compat_writev+0x115/0x220 [ 33.734262] ? compat_writev+0x420/0x420 [ 33.738306] compat_SyS_writev+0x26/0x30 [ 33.742338] ? compat_SyS_preadv2+0x90/0x90 [ 33.746632] do_fast_syscall_32+0x3f2/0xf05 [ 33.750930] ? do_int80_syscall_32+0x940/0x940 [ 33.755486] ? lockdep_sys_exit+0x47/0xf0 [ 33.759604] ? syscall_return_slowpath+0x2b3/0x510 [ 33.764502] ? finish_task_switch+0x1aa/0x740 [ 33.768969] ? lockdep_sys_exit+0x47/0xf0 [ 33.773085] ? retint_user+0x18/0x20 [ 33.776773] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.781593] entry_SYSENTER_compat+0x51/0x60 [ 33.785976] RIP: 0023:0xf7f1cc79 [ 33.789308] RSP: 002b:000000000820fe4c EFLAGS: 00000207 ORIG_RAX: 0000000000000092 [ 33.796987] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001ff0 [ 33.804226] RDX: 0000000000000001 RSI: 0000000000000167 RDI: 0000000000000010 [ 33.811465] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 33.818706] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.825948] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.833405] Dumping ftrace buffer: [ 33.836967] (ftrace buffer empty) [ 33.840650] Kernel Offset: disabled [ 33.844255] Rebooting in 86400 seconds..