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-386-4,10.128.0.47' (ECDSA) to the list of known hosts.
2017/12/07 08:14:52 parsed 1 programs
2017/12/07 08:14:52 executed programs: 0
syzkaller login: [   18.851367] kasan: CONFIG_KASAN_INLINE enabled
[   18.852119] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   18.853230] general protection fault: 0000 [#1] SMP KASAN
[   18.854013] Dumping ftrace buffer:
[   18.854499]    (ftrace buffer empty)
[   18.855019] Modules linked in:
[   18.855459] CPU: 1 PID: 3092 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #120
[   18.856425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   18.857649] RIP: 0010:page_mapping+0xa4/0x530
[   18.858243] RSP: 0018:ffff8801cbe07180 EFLAGS: 00010202
[   18.858953] RAX: 0000000000000004 RBX: 1ffff100397c0e31 RCX: ffffffff8194bf1d
[   18.859904] RDX: 0000000000000000 RSI: 1ffff100397c0ecf RDI: 0000000000000000
[   18.860871] RBP: ffff8801cbe072d0 R08: ffffed0039760574 R09: ffff8801cbb02b80
[   18.861839] R10: ffff8801cbf193e8 R11: ffffed0039760573 R12: 0000000000000000
[   18.862789] R13: ffff8801cbe072a8 R14: dffffc0000000000 R15: 0000000000000020
[   18.863794] FS:  0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:0000000009300900
[   18.864878] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   18.865651] CR2: 0000000008066b30 CR3: 00000001d1a8f000 CR4: 00000000001406e0
[   18.866605] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   18.867568] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   18.868517] Call Trace:
[   18.868872]  ? kstrndup+0xd0/0xd0
[   18.869359]  ? lock_downgrade+0x980/0x980
[   18.869920]  ? trace_hardirqs_off+0xd/0x10
[   18.870487]  ? _raw_spin_unlock_irqrestore+0xa6/0xba
[   18.871189]  set_page_dirty+0xb9/0x5d0
[   18.873094]  ? __writepage+0xc0/0xc0
[   18.876776]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   18.881755]  ? trace_hardirqs_on+0xd/0x10
[   18.885868]  ? __rds_conn_create+0x37f/0x17e0
[   18.890335]  ? rds_conn_message_info_send+0x30/0x30
[   18.895320]  rds_atomic_free_op+0xc2/0x330
[   18.899520]  ? rds_rdma_free_op+0x500/0x500
[   18.903808]  ? refcount_sub_and_test+0x115/0x1b0
[   18.908531]  ? refcount_inc+0x50/0x50
[   18.912302]  rds_message_put+0x53c/0x6b0
[   18.916330]  ? kfree+0x1e7/0x250
[   18.919662]  ? rds_message_add_rdma_dest_extension+0x170/0x170
[   18.925599]  ? rds_cmsg_rdma_map+0xb0/0xb0
[   18.929799]  ? trace_hardirqs_on+0xd/0x10
[   18.933914]  ? _raw_spin_unlock_bh+0x30/0x40
[   18.938295]  ? __release_sock+0x360/0x360
[   18.942410]  ? lock_sock_nested+0x91/0x110
[   18.946610]  ? rds_conn_create_outgoing+0x3f/0x50
[   18.951421]  rds_sendmsg+0x14ee/0x1f90
[   18.955280]  ? rds_send_drop_to+0x19d0/0x19d0
[   18.959744]  ? lock_release+0xda0/0xda0
[   18.963683]  ? trace_event_raw_event_sched_switch+0x800/0x800
[   18.969530]  ? sock_has_perm+0x29c/0x400
[   18.973557]  ? __check_object_size+0x25d/0x4f0
[   18.978108]  ? selinux_secmark_relabel_packet+0xc0/0xc0
[   18.983435]  ? __might_sleep+0x95/0x190
[   18.987376]  ? kasan_check_write+0x14/0x20
[   18.991578]  ? _copy_from_user+0x99/0x110
[   18.995691]  ? selinux_socket_sendmsg+0x36/0x40
[   19.000324]  ? security_socket_sendmsg+0x89/0xb0
[   19.005043]  ? rds_send_drop_to+0x19d0/0x19d0
[   19.009506]  sock_sendmsg+0xca/0x110
[   19.013187]  ___sys_sendmsg+0x75b/0x8a0
[   19.017127]  ? copy_msghdr_from_user+0x590/0x590
[   19.021847]  ? _raw_spin_unlock+0x22/0x30
[   19.025960]  ? check_noncircular+0x20/0x20
[   19.030168]  ? __pmd_alloc+0x4e0/0x4e0
[   19.034026]  ? find_held_lock+0x39/0x1d0
[   19.038053]  ? __fget_light+0x29d/0x390
[   19.041991]  ? fget_raw+0x20/0x20
[   19.045417]  ? find_held_lock+0x39/0x1d0
[   19.049451]  ? __fdget+0x18/0x20
[   19.052788]  __sys_sendmsg+0xe5/0x210
[   19.056553]  ? __sys_sendmsg+0xe5/0x210
[   19.060492]  ? SyS_shutdown+0x290/0x290
[   19.064431]  ? handle_mm_fault+0x410/0x8d0
[   19.068632]  ? __do_page_fault+0x32d/0xc90
[   19.072835]  ? compat_SyS_futex+0x288/0x380
[   19.077133]  compat_SyS_sendmsg+0x2a/0x40
[   19.081249]  ? compat_SyS_getsockopt+0x420/0x420
[   19.085972]  do_fast_syscall_32+0x3ee/0xf9d
[   19.090264]  ? do_int80_syscall_32+0x9d0/0x9d0
[   19.094809]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   19.099530]  ? lockdep_sys_exit+0x47/0xf0
[   19.103642]  ? syscall_return_slowpath+0x2ad/0x550
[   19.108553]  ? sysret32_from_system_call+0x5/0x3b
[   19.113370]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   19.118180]  entry_SYSENTER_compat+0x51/0x60
[   19.122557] RIP: 0023:0xf7f5bc79
[   19.125885] RSP: 002b:00000000ffcb505c EFLAGS: 00000296 ORIG_RAX: 0000000000000172
[   19.133559] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000002048cfe4
[   19.140791] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000000
[   19.148025] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   19.155259] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   19.162495] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   19.169744] Code: f2 f2 f2 c7 40 14 00 f2 f2 f2 c7 40 18 f2 f2 f2 f2 c7 40 1c 00 f2 f2 f2 c7 40 20 f3 f3 f3 f3 e8 c3 38 db ff 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 41 04 00 00 4d 8d b5 00 ff ff ff 48 ba 00 
[   19.188817] RIP: page_mapping+0xa4/0x530 RSP: ffff8801cbe07180
[   19.194834] ---[ end trace 85d6257c8bf79b22 ]---
[   19.199737] Kernel panic - not syncing: Fatal exception
[   19.205386] Dumping ftrace buffer:
[   19.208889]    (ftrace buffer empty)
[   19.212567] Kernel Offset: disabled
[   19.216174] Rebooting in 86400 seconds..