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-7,10.128.0.46' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   53.844101] ------------[ cut here ]------------
[   53.844846] WARNING: CPU: 1 PID: 2987 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   53.846130] Kernel panic - not syncing: panic_on_warn set ...
[   53.846130] 
[   53.847101] CPU: 1 PID: 2987 Comm: syzkaller998069 Not tainted 4.14.0-rc5-next-20171018+ #36
[   53.848232] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.849464] Call Trace:
[   53.849827]  dump_stack+0x194/0x257
[   53.850331]  ? arch_local_irq_restore+0x53/0x53
[   53.850969]  ? vsnprintf+0x1ed/0x1900
[   53.851489]  panic+0x1e4/0x41c
[   53.851933]  ? refcount_error_report+0x214/0x214
[   53.852583]  ? show_regs_print_info+0x65/0x65
[   53.853189]  ? __warn+0x1a9/0x1e0
[   53.853713]  ? kmalloc_slab+0x5d/0x70
[   53.854227]  __warn+0x1c4/0x1e0
[   53.854672]  ? kmalloc_slab+0x5d/0x70
[   53.855206]  report_bug+0x211/0x2d0
[   53.855701]  fixup_bug+0x40/0x90
[   53.856157]  do_trap+0x260/0x390
[   53.856617]  do_error_trap+0x120/0x390
[   53.857142]  ? do_trap+0x390/0x390
[   53.857620]  ? kmalloc_slab+0x5d/0x70
[   53.858153]  ? __lock_is_held+0xb6/0x140
[   53.858702]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   53.859354]  do_invalid_op+0x1b/0x20
[   53.859854]  invalid_op+0x18/0x20
[   53.860320] RIP: 0010:kmalloc_slab+0x5d/0x70
[   53.860921] RSP: 0018:ffff8801d1ea7670 EFLAGS: 00010246
[   53.861632] RAX: 0000000000000000 RBX: ffff8801d27efb40 RCX: ffffffff81707d57
[   53.862602] RDX: 1ffff1003a45ce12 RSI: 0000000000000000 RDI: 0000000000d00000
[   53.863579] RBP: ffff8801d1ea7670 R08: 0000000000000001 R09: 0000000000000000
[   53.866602] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d22e7090
[   53.873837] R13: 0000000000000000 R14: 00000000014000c0 R15: ffffffff85977aa0
[   53.881085]  ? relay_open_buf.part.10+0x97/0x9b0
[   53.885816]  __kmalloc+0x25/0x760
[   53.889236]  ? kmem_cache_alloc_trace+0x456/0x750
[   53.894049]  ? relay_open_buf.part.10+0xc8/0x9b0
[   53.898778]  relay_open_buf.part.10+0xc8/0x9b0
[   53.903334]  ? find_next_bit+0x27/0x30
[   53.907191]  relay_open+0x57a/0xa40
[   53.910786]  ? relay_open_buf.part.10+0x9b0/0x9b0
[   53.915599]  ? __debugfs_create_file+0x2cc/0x3e0
[   53.920324]  ? debugfs_create_file+0x57/0x70
[   53.924705]  do_blk_trace_setup+0x4a4/0xcf0
[   53.929825]  ? blk_tracer_print_line+0x40/0x40
[   53.934382]  ? __might_sleep+0x95/0x190
[   53.938331]  ? kasan_check_write+0x14/0x20
[   53.942535]  ? _copy_from_user+0x99/0x110
[   53.946654]  blk_trace_setup+0xbd/0x180
[   53.950599]  ? do_blk_trace_setup+0xcf0/0xcf0
[   53.955068]  ? disk_name+0x98/0x100
[   53.958664]  ? __handle_mm_fault+0x587/0x39c0
[   53.963132]  blk_trace_ioctl+0x1ab/0x2d0
[   53.967162]  ? blk_add_trace_rq_remap+0x600/0x600
[   53.971980]  ? avc_has_extended_perms+0x7fa/0x12c0
[   53.976882]  blkdev_ioctl+0x8e6/0x1de0
[   53.980740]  ? blkpg_ioctl+0xb20/0xb20
[   53.984602]  ? avc_ss_reset+0x110/0x110
[   53.988542]  ? find_held_lock+0x35/0x1d0
[   53.992578]  ? __do_page_fault+0x64c/0xd60
[   53.996781]  ? lock_downgrade+0x990/0x990
[   54.000905]  ? handle_mm_fault+0x410/0x8d0
[   54.005120]  ? trace_event_raw_event_sched_switch+0x8a0/0x8a0
[   54.010972]  ? up_read+0x1a/0x40
[   54.014307]  ? rcu_note_context_switch+0x710/0x710
[   54.019209]  block_ioctl+0xde/0x120
[   54.022808]  ? blkdev_fallocate+0x3b0/0x3b0
[   54.027101]  do_vfs_ioctl+0x1b1/0x1520
[   54.030966]  ? _cond_resched+0x14/0x30
[   54.034824]  ? ioctl_preallocate+0x2b0/0x2b0
[   54.039206]  ? selinux_capable+0x40/0x40
[   54.043236]  ? putname+0xf3/0x130
[   54.046668]  ? do_sys_open+0x320/0x6d0
[   54.050534]  ? security_file_ioctl+0x89/0xb0
[   54.054915]  SyS_ioctl+0x8f/0xc0
[   54.058257]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   54.062993] RIP: 0033:0x443e49
[   54.066152] RSP: 002b:00007fff2afcf468 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[   54.073826] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e49
[   54.081061] RDX: 0000000020ed6000 RSI: 00000000c0481273 RDI: 0000000000000003
[   54.088303] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
[   54.095539] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000401b30
[   54.102780] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000
[   54.110496] Dumping ftrace buffer:
[   54.114062]    (ftrace buffer empty)
[   54.117744] Kernel Offset: disabled
[   54.121342] Rebooting in 86400 seconds..