Looks like calling futex() with garbage makes things unhappy.
Dave
[ 673.054286] BUG: unable to handle kernel NULL pointer dereference at
0000000000000028
[ 673.055292] IP: [<ffffffff810d665e>] __lock_acquire+0x5e/0x1ae0
[ 673.056225] PGD 1107c8067 PUD 11079c067 PMD 0
[ 673.057224] Oops: 0000 [#1] SMP
[ 673.058248] CPU 3
[ 673.058263] Modules linked in:<4>[ 673.069440] ebt_snat<4>[ 673.088955]
xt_cluster<4>[ 673.095505] nls_cp874 nls_cp850 nls_cp869 nls_iso8859_1
nls_iso8859_6 romfs ufs nfs_layout_nfsv41_files blocklayoutdriver nfs ecryptfs
cachefiles binfmt_misc udf sysv hfsplus msdos vfat fat cuse fuse cramfs 9p
9pnet ceph libceph hfs befs cifs fscache ncpfs coda affs btrfs squashfs minix
hwpoison_inject encrypted_keys tgr192 lzo ansi_cprng rmd128 khazad authencesn
ccm salsa20_generic serpent_generic anubis tea blowfish_generic cast6 rmd320
des_generic sha256_generic fcrypt crypto_user ghash_generic camellia_generic
md4 twofish_generic crypto_null sha512_generic zlib vmac blowfish_common lrw
wp512 gcm cts deflate twofish_common pcrypt rmd160 cast5 authenc xts gf128mul
pcbc raid6test michael_mic rmd256 seed xcbc crc8 cpu_notifier_error_inject
ts_fsm crc7 ts_bm cordic crc_itu_t ts_kmp lpc_sch mfd_core i2c_dev
i2c_pca_platform i2c_diolan_u2c i2c_simtec i2c_isch i2c_scmi i2c_tiny_usb
i2c_piix4 i2c_algo_pca i2c_smbus acpi_pad ec_sys sbs sbshc custom_method
asus_atk0110 acpi_power_meter pmbus_core cpufreq_stats softdog ioatdma pch_dma
usb_storage nosy bonding ixgb e100 ixgbe e1000 ixgbevf igb igbvf
team_mode_activebackup team_mode_roundrobin team eql can_dev netconsole
ppp_async crc_ccitt pppoe pptp gre ppp_synctty pppox ppp_deflate zlib_deflate
arc4 ppp_mppe bsd_comp ppp_generic catc kaweth pegasus rtl8150 ipheth veth slhc
dummy mii lxt vitesse mdio_bitbang davicom marvell cicada national ste10Xp
broadcom icplus et1011c micrel realtek smsc qsemi mdio vhost_net tun macvtap
macvlan cryptoloop brd rtc_max6900 rtc_em3027 rtc_bq32k rtc_ds1286 rtc_m48t59
rtc_ds1511 rtc_ds1672 rtc_rx8025 rtc_isl12022 rtc_ds1374 rtc_stk17ta8 rtc_x1205
rtc_v3020 rtc_rs5c372 rtc_ds3232 rtc_bq4802 rtc_pcf8563 rtc_rx8581 rtc_rv3029c2
rtc_ds1307 rtc_m48t35 rtc_ds1553 rtc_pcf8583 rtc_ds1742 rtc_isl1208 rtc_m41t80
rtc_fm3130 scsi_transport_fc scsi_transport_spi ch scsi_wait_scan raid_class
scsi_tgt libsas scsi_transport_sas uio_aec uio_sercos3 uio_cif uio_pci_generic
uio timeriomem_rng hangcheck_timer dca pps_ldisc pps_gpio dm_queue_length
multipath dm_crypt dm_service_time faulty dm_round_robin dm_log_userspace
linear dm_thin_pool dm_persistent_data libcrc32c dm_bufio dm_flakey
dm_multipath raid0 dm_raid raid456 raid1 async_raid6_recov async_memcpy
async_pq async_xor xor async_tx raid6_pq raid10 shpchp fakephp aer_inject ptp
pps_core target_core_file target_core_iblock target_core_pscsi tcm_loop
target_core_mod vga16fb sysimgblt fb_sys_fops syscopyarea vgastate output
platform_lcd lcd sysfillrect n_r3964 n_gsm nozomi jsm serio_raw altera_ps2
input_polldev sparse_keymap uinput ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6
xt_state nf_conntrack ip6table_filter ip6_tables kvm_intel kvm crc32c_intel
ghash_clmulni_intel microcode usb_debug pcspkr i2c_i801 e1000e nfsd nfs_acl
auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core
[last unloaded: scsi_wait_scan]
[ 673.095668]
[ 673.095669] Pid: 22872, comm: trinity-child3 Not tainted 3.5.0-rc6+ #107
[ 673.095673] RIP: 0010:[<ffffffff810d665e>] [<ffffffff810d665e>]
__lock_acquire+0x5e/0x1ae0
[ 673.095679] RSP: 0000:ffff8801107c7a48 EFLAGS: 00010046
[ 673.095679] RAX: 0000000000000082 RBX: 0000000000000000 RCX: 0000000000000000
[ 673.095680] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000028
[ 673.095681] RBP: ffff8801107c7b38 R08: 0000000000000002 R09: 0000000000000000
[ 673.095682] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000002
[ 673.095683] R13: ffff8800a9144d20 R14: 0000000000000002 R15: 0000000000000028
[ 673.095684] FS: 00007f4343491740(0000) GS:ffff880148200000(0000)
knlGS:0000000000000000
[ 673.095685] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 673.095686] CR2: 0000000000000028 CR3: 000000012d9ba000 CR4: 00000000001407e0
[ 673.095687] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 673.095688] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 673.095690] Process trinity-child3 (pid: 22872, threadinfo ffff8801107c6000,
task ffff8800a9144d20)
[ 673.095690] Stack:
[ 673.095691] ffff8801107c7a58 ffff8800a91455e0 0000000000000002
ffff8800a9144d20
[ 673.095695] 000000000000029f ffffffff82959908 ffff8801107c7b78
0000000000000082
[ 673.095699] ffff8801107c7aa8 ffffffff816884f0 ffff8800a9144d20
ffff88013f748000
[ 673.095702] Call Trace:
[ 673.095703] [<ffffffff816884f0>] ? _raw_spin_unlock_irq+0x30/0x60
[ 673.095708] [<ffffffff810d941d>] ? trace_hardirqs_on_caller+0x15d/0x1e0
[ 673.095710] [<ffffffff810d94ad>] ? trace_hardirqs_on+0xd/0x10
[ 673.095713] [<ffffffff810d87ed>] lock_acquire+0xad/0x220
[ 673.095715] [<ffffffff810e0104>] ? rt_mutex_finish_proxy_lock+0x34/0xd0
[ 673.095717] [<ffffffff810d3958>] ? trace_hardirqs_off_caller+0x28/0xd0
[ 673.095720] [<ffffffff81687de6>] _raw_spin_lock+0x46/0x80
[ 673.095722] [<ffffffff810e0104>] ? rt_mutex_finish_proxy_lock+0x34/0xd0
[ 673.095725] [<ffffffff810e0104>] rt_mutex_finish_proxy_lock+0x34/0xd0
[ 673.095726] [<ffffffff810ddbd2>]
futex_wait_requeue_pi.constprop.20+0x2d2/0x3d0
[ 673.095730] [<ffffffff81097ff0>] ? update_rmtp+0x70/0x70
[ 673.095733] [<ffffffff810993c4>] ? hrtimer_start_range_ns+0x14/0x20
[ 673.095736] [<ffffffff810de42a>] do_futex+0xea/0xa20
[ 673.095738] [<ffffffff810ad759>] ? local_clock+0x99/0xc0
[ 673.095741] [<ffffffff81189443>] ? might_fault+0x53/0xb0
[ 673.095746] [<ffffffff810dee67>] sys_futex+0x107/0x1a0
[ 673.095749] [<ffffffff810d9400>] ? trace_hardirqs_on_caller+0x140/0x1e0
[ 673.095751] [<ffffffff81691b6d>] system_call_fastpath+0x1a/0x1f
[ 673.095755] Code: d8 45 0f 45 e0 4c 89 75 f0 4c 89 7d f8 85 c0 0f 84 f8 00
00 00 8b 05 e2 af fa 00 49 89 ff 89 f3 41 89 d2 85 c0 0f 84 02 01 00 00 <49> 8b
07 ba 01 00 00 00 48 3d 20 c4 0c 82 44 0f 44 e2 83 fb 01
[ 673.095789] RIP [<ffffffff810d665e>] __lock_acquire+0x5e/0x1ae0
[ 673.095791] RSP <ffff8801107c7a48>
[ 673.095792] CR2: 0000000000000028
[ 673.095793] ---[ end trace c26f1bd418342e06 ]---
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