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-mmots-kasan-gce-9,10.128.0.60' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   48.302709] WARNING: CPU: 1 PID: 3088 at mm/slab_common.c:1002 kmalloc_slab+0x5d/0x70
[   48.303875] Kernel panic - not syncing: panic_on_warn set ...
[   48.303875] 
[   48.304845] CPU: 1 PID: 3088 Comm: syzkaller064167 Not tainted 4.15.0-rc1-mm1+ #29
[   48.305864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.307108] Call Trace:
[   48.307465]  dump_stack+0x194/0x257
[   48.307958]  ? arch_local_irq_restore+0x53/0x53
[   48.308587]  ? vsnprintf+0x1ed/0x1900
[   48.309127]  panic+0x1e4/0x41c
[   48.309559]  ? refcount_error_report+0x214/0x214
[   48.310242]  ? show_regs_print_info+0x65/0x65
[   48.310844]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   48.311525]  ? __warn+0x1c1/0x200
[   48.312027]  ? kmalloc_slab+0x5d/0x70
[   48.312561]  __warn+0x1dc/0x200
[   48.313026]  ? kmalloc_slab+0x5d/0x70
[   48.313539]  report_bug+0x211/0x2d0
[   48.314039]  fixup_bug.part.11+0x37/0x80
[   48.314601]  do_error_trap+0x2d7/0x3e0
[   48.315122]  ? entry_SYSCALL_64_fastpath+0x1f/0x96
[   48.315782]  ? math_error+0x400/0x400
[   48.316353]  ? check_noncircular+0x20/0x20
[   48.316920]  ? print_usage_bug+0x3f0/0x3f0
[   48.317488]  ? lock_downgrade+0x980/0x980
[   48.318080]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   48.318760]  do_invalid_op+0x1b/0x20
[   48.319259]  invalid_op+0x22/0x40
[   48.319723] RIP: 0010:kmalloc_slab+0x5d/0x70
[   48.320308] RSP: 0018:ffff8801cbb7f678 EFLAGS: 00010246
[   48.321031] RAX: 0000000000000000 RBX: ffff8801cb8b7b40 RCX: ffffffff8171fa67
[   48.321982] RDX: 1ffff10039813992 RSI: 0000000000000000 RDI: 0000000007b81000
[   48.323729] RBP: ffff8801cbb7f678 R08: 1ffff1003976fe46 R09: 0000000000000000
[   48.330965] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cc09cc90
[   48.338203] R13: 0000000000000000 R14: 00000000014000c0 R15: ffffffff85bebae0
[   48.345451]  ? relay_open_buf.part.10+0x97/0x9b0
[   48.350187]  ? rcu_read_lock_sched_held+0x108/0x120
[   48.355170]  __kmalloc+0x25/0x760
[   48.358588]  ? kmem_cache_alloc_trace+0x459/0x750
[   48.363403]  ? relay_open_buf.part.10+0xc8/0x9b0
[   48.368131]  relay_open_buf.part.10+0xc8/0x9b0
[   48.372691]  relay_open+0x57a/0xa40
[   48.376289]  ? relay_open_buf.part.10+0x9b0/0x9b0
[   48.381102]  ? __debugfs_create_file+0x2cf/0x3d0
[   48.385828]  ? debugfs_create_file+0x57/0x70
[   48.390210]  do_blk_trace_setup+0x4a4/0xcd0
[   48.394510]  ? blk_tracer_print_line+0x40/0x40
[   48.399059]  ? __might_sleep+0x95/0x190
[   48.403008]  ? kasan_check_write+0x14/0x20
[   48.407213]  ? _copy_from_user+0x99/0x110
[   48.411329]  __blk_trace_setup+0xb6/0x140
[   48.415444]  ? do_blk_trace_setup+0xcd0/0xcd0
[   48.419911]  ? disk_name+0x98/0x100
[   48.423512]  blk_trace_ioctl+0x1d5/0x2a0
[   48.427540]  ? blk_add_trace_rq_remap+0x680/0x680
[   48.432356]  ? avc_has_extended_perms+0x7fa/0x12c0
[   48.437255]  blkdev_ioctl+0x1845/0x1e00
[   48.441198]  ? blkpg_ioctl+0xb20/0xb20
[   48.445052]  ? avc_ss_reset+0x110/0x110
[   48.448998]  ? lock_downgrade+0x980/0x980
[   48.453127]  ? down_read_trylock+0xdb/0x170
[   48.457423]  ? trace_event_raw_event_sched_switch+0x800/0x800
[   48.463272]  ? up_read+0x1a/0x40
[   48.466607]  ? rcu_note_context_switch+0x710/0x710
[   48.471511]  block_ioctl+0xea/0x130
[   48.475110]  ? blkdev_fallocate+0x3b0/0x3b0
[   48.479395]  do_vfs_ioctl+0x1b1/0x1530
[   48.483247]  ? _cond_resched+0x14/0x30
[   48.487107]  ? ioctl_preallocate+0x2b0/0x2b0
[   48.491486]  ? selinux_capable+0x40/0x40
[   48.495515]  ? putname+0xf3/0x130
[   48.498937]  ? do_sys_open+0x320/0x6d0
[   48.502803]  ? security_file_ioctl+0x89/0xb0
[   48.507183]  SyS_ioctl+0x8f/0xc0
[   48.510521]  entry_SYSCALL_64_fastpath+0x1f/0x96
[   48.515242] RIP: 0033:0x443e59
[   48.518398] RSP: 002b:00007ffe38955418 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[   48.526073] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e59
[   48.533311] RDX: 0000000020ed6000 RSI: 00000000c0481273 RDI: 0000000000000003
[   48.540547] RBP: 00000000006ce018 R08: 0000f8ff00000000 R09: 0000000000000000
[   48.547784] R10: 000000000000ffff R11: 0000000000000206 R12: 0000000000401b40
[   48.555020] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000
[   48.562437] Dumping ftrace buffer:
[   48.565992]    (ftrace buffer empty)
[   48.569670] Kernel Offset: disabled
[   48.573266] Rebooting in 86400 seconds..