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-next-kasan-gce-1,10.128.0.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.650534] ------------[ cut here ]------------ [ 68.651293] WARNING: CPU: 0 PID: 2987 at net/ipv6/ip6_fib.c:1137 fib6_add+0x20d9/0x2c10 [ 68.652610] Kernel panic - not syncing: panic_on_warn set ... [ 68.652610] [ 68.653607] CPU: 0 PID: 2987 Comm: syzkaller727237 Not tainted 4.14.0-rc5-next-20171018+ #36 [ 68.654728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.655957] Call Trace: [ 68.656318] dump_stack+0x194/0x257 [ 68.656834] ? arch_local_irq_restore+0x53/0x53 [ 68.657487] ? vsnprintf+0x1ed/0x1900 [ 68.658008] panic+0x1e4/0x41c [ 68.658444] ? refcount_error_report+0x214/0x214 [ 68.659082] ? show_regs_print_info+0x65/0x65 [ 68.659689] ? __warn+0x1a9/0x1e0 [ 68.660183] ? fib6_add+0x20d9/0x2c10 [ 68.660694] __warn+0x1c4/0x1e0 [ 68.661139] ? fib6_add+0x20d9/0x2c10 [ 68.661656] report_bug+0x211/0x2d0 [ 68.662152] fixup_bug+0x40/0x90 [ 68.662607] do_trap+0x260/0x390 [ 68.663070] do_error_trap+0x120/0x390 [ 68.663613] ? do_trap+0x390/0x390 [ 68.664090] ? fib6_add+0x20d9/0x2c10 [ 68.664614] ? __lock_is_held+0xb6/0x140 [ 68.665181] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 68.665829] do_invalid_op+0x1b/0x20 [ 68.666332] invalid_op+0x18/0x20 [ 68.666799] RIP: 0010:fib6_add+0x20d9/0x2c10 [ 68.667396] RSP: 0018:ffff8801d1f8f6a0 EFLAGS: 00010293 [ 68.668105] RAX: ffff8801d1e86140 RBX: 1ffff1003a3f1eec RCX: ffffffff8441a159 [ 68.669057] RDX: 0000000000000000 RSI: ffff8801c1453380 RDI: ffff8801c1453400 [ 68.670037] RBP: ffff8801d1f8fa08 R08: 0000000000000000 R09: 0000000000000004 [ 68.671027] R10: ffff8801d1f8f8d0 R11: 0000000000000003 R12: 0000000000000001 [ 68.678269] R13: dffffc0000000000 R14: ffff8801c1453380 R15: ffffffff86027680 [ 68.685528] ? fib6_add+0x20d9/0x2c10 [ 68.689311] ? __lock_is_held+0xb6/0x140 [ 68.693345] ? fib6_force_start_gc+0xf0/0xf0 [ 68.697722] ? rt6_info_init+0x96/0x1e0 [ 68.701674] ? dst_alloc+0x14a/0x1a0 [ 68.705360] ? __alloc_percpu_gfp+0x27/0x30 [ 68.709653] ? lock_acquire+0x1d5/0x580 [ 68.713594] ? lock_acquire+0x1d5/0x580 [ 68.717534] ? __ip6_ins_rt+0x56/0x90 [ 68.721303] ? ip6_convert_metrics.isra.70+0x518/0x6b0 [ 68.726566] ? lock_release+0xa40/0xa40 [ 68.730523] ? rt6_uncached_list_add+0x240/0x240 [ 68.735249] ? __might_fault+0x110/0x1d0 [ 68.739281] ? lock_downgrade+0x990/0x990 [ 68.743398] ? __ip6_ins_rt+0x56/0x90 [ 68.747170] __ip6_ins_rt+0x6c/0x90 [ 68.750779] ip6_route_add+0x148/0x1a0 [ 68.754633] ? icmp6_dst_alloc+0x630/0x630 [ 68.758843] ipv6_route_ioctl+0x4cf/0x690 [ 68.762962] ? rt6_purge_dflt_routers+0x9d0/0x9d0 [ 68.767812] inet6_ioctl+0xef/0x1e0 [ 68.771404] ? inet6_ioctl+0xef/0x1e0 [ 68.775179] sock_do_ioctl+0x65/0xb0 [ 68.778862] sock_ioctl+0x2c2/0x440 [ 68.782467] ? dlci_ioctl_set+0x40/0x40 [ 68.786410] do_vfs_ioctl+0x1b1/0x1520 [ 68.790263] ? _cond_resched+0x14/0x30 [ 68.794124] ? ioctl_preallocate+0x2b0/0x2b0 [ 68.798506] ? selinux_capable+0x40/0x40 [ 68.802539] ? __fd_install+0x69b/0x6a0 [ 68.806481] ? sock_map_fd+0x53/0x70 [ 68.810167] ? security_file_ioctl+0x89/0xb0 [ 68.814547] SyS_ioctl+0x8f/0xc0 [ 68.817888] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 68.822626] RIP: 0033:0x43ff59 [ 68.825783] RSP: 002b:00007fff2a873298 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 68.833455] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff59 [ 68.840689] RDX: 00000000206bb000 RSI: 000000000000890b RDI: 0000000000000003 [ 68.847923] RBP: 0000000000000082 R08: 0000000000000000 R09: 00000000004018c0 [ 68.855162] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018c0 [ 68.862400] R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 [ 68.870215] Dumping ftrace buffer: [ 68.873766] (ftrace buffer empty) [ 68.877443] Kernel Offset: disabled [ 68.881042] Rebooting in 86400 seconds..