linux-kernel - kernel 4.7 panic Workqueue: events do_cache

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Date:	Tue, 26 Jul 2016 21:45:30 +0200
From:	Malte Schröder <malte@...ip.de>
To:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: kernel 4.7 panic Workqueue: events do_cache_clean [sunrpc]

Hi, I get frequent crashes with kernel 4.7 on my server system. The
backtrace points to RPC-GSS.


[  343.457095] ------------[ cut here ]------------
[  343.457143] kernel BUG at mm/slub.c:3657!
[  343.457169] invalid opcode: 0000 [#1] SMP
[  343.457192] Modules linked in: rpcsec_gss_krb5 netconsole configfs
ebtable_filter ebtab
les nls_iso8859_1 nls_cp437 vfat fat cpufreq_stats ip6table_nat
nf_nat_ipv6 ip6t_REJECT nf
_reject_ipv6 xt_REDIRECT nf_nat_redirect ipt_MASQUERADE
nf_nat_masquerade_ipv4 xt_recent x
t_comment iptable_nat nf_nat_ipv4 ipt_REJECT nf_reject_ipv4 xt_addrtype
iptable_mangle ipt
able_raw nf_conntrack_ipv4 bridge nf_defrag_ipv4 xt_policy xt_mark
ip6table_mangle xt_tcpu
dp xt_CT ip6table_raw xt_multiport nf_conntrack_ipv6 nf_defrag_ipv6
nf_log_ipv4 nf_nat_tft
p nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip nf_nat_pptp
nf_nat_proto_gre xt_conntrack
 nf_nat_irc nf_nat_h323 nf_nat_ftp xt_NFLOG xt_LOG nf_nat_amanda nf_nat
nf_log_ipv6 nf_log
_common nf_conntrack_tftp nf_conntrack_sane nf_conntrack_sip
nf_conntrack_proto_udplite nf
_conntrack_proto_sctp nf_conntrack_pptp nf_conntrack_proto_gre ts_kmp
nf_conntrack_netlink
 nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc
nf_conntrack_h323 nf_conn
track_amanda nf_conntrack_ftp nf_conntrack xfrm_user xfrm_algo 8021q
garp mrp stp llc ip6t
able_filter ip6_tables iptable_filter ip_tables x_tables macvlan tun
nfnetlink_log nfnetli
nk binfmt_misc snd_hda_codec_hdmi pl2303 hid_generic usbhid hid
x86_pkg_temp_thermal coret
emp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel
 aesni_intel aes_x86_64 lrw ftdi_sio usbserial glue_helper ablk_helper
cryptd i915 intel_c
state intel_uncore iTCO_wdt iTCO_vendor_support drm_kms_helper
intel_rapl_perf drm mei_wdt
 intel_gtt tpm_tis snd_hda_codec_realtek agpgart tpm
snd_hda_codec_generic snd_hda_intel s
nd_pcsp snd_hda_codec snd_hwdep 8250_pci video sg snd_hda_core 8250
8250_base syscopyarea
sysfillrect sysimgblt serial_core backlight fb_sys_fops snd_pcm
snd_timer lpc_ich snd mfd_
core firewire_ohci firewire_core mei_me mei xhci_pci xhci_hcd ehci_pci
ehci_hcd usbcore us
b_common soundcore i2c_i801 crc_itu_t button tcp_cdg nfsd nfs_acl lockd
auth_rpcgss grace
sunrpc efivarfs evdev input_leds led_class thermal fan
[  343.458755] CPU: 2 PID: 780 Comm: kworker/2:1 Not tainted 4.7.0-
gateway #1
[  343.458795] Hardware name: Supermicro X10SAE/X10SAE, BIOS 2.0a
05/09/2014
[  343.458844] Workqueue: events do_cache_clean [sunrpc]
[  343.458879] task: ffff8807fb578000 ti: ffff8807f94b8000 task.ti:
ffff8807f94b8000
[  343.458917] RIP: 0010:[<ffffffff82131c47>]  [<ffffffff82131c47>]
kfree+0xb7/0xf0
[  343.458966] RSP: 0018:ffff8807f94bbdd8  EFLAGS: 00010246
[  343.458997] RAX: dead000000000100 RBX: ffff8807632046c0 RCX:
1464eb7873bd1a00
[  343.459037] RDX: 0000000000000000 RSI: ffff8800c78ceb00 RDI:
ffff8807b90dd034
[  343.459073] RBP: ffff8800c78ceb00 R08: 000000000000037d R09:
0000000000000000
[  343.459112] R10: ffffea001ee43740 R11: 0000000000000000 R12:
0000000000000001
[  343.459151] R13: ffffffffc02e49b0 R14: 0000000000000000 R15:
0000000000000000
[  343.459187] FS:  0000000000000000(0000) GS:ffff88081fa80000(0000)
knlGS:000000000000000
0
[  343.459231] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  343.459265] CR2: 0000555b6577e888 CR3: 0000000002806000 CR4:
00000000001406e0
[  343.459300] Stack:
[  343.459318]  ffffffffc02e493d ffff8807632046c0 ffffffffc02e49bd
ffff8807632046e0
[  343.459373]  ffffffffc02c22c7 000000005797ae09 00000000346c99de
ffffffffc02d7460
[  343.459428]  ffff8807fab3dcc0 ffff88081fa94880 ffff88081fa98e00
ffffffffc02c2305
[  343.459484] Call Trace:
[  343.459505]  [<ffffffffc02e493d>] ? rsc_free+0xd/0x80 [auth_rpcgss]
[  343.459543]  [<ffffffffc02e49bd>] ? rsc_put+0xd/0x20 [auth_rpcgss]
[  343.459584]  [<ffffffffc02c22c7>] ? cache_clean+0x277/0x2b0 [sunrpc]
[  343.459623]  [<ffffffffc02c2305>] ? do_cache_clean+0x5/0x60 [sunrpc]
[  343.459661]  [<ffffffff8205c1fb>] ? process_one_work+0x12b/0x400
[  343.459696]  [<ffffffff8205c512>] ? worker_thread+0x42/0x4b0
[  343.459727]  [<ffffffff8205c4d0>] ? process_one_work+0x400/0x400
[  343.459763]  [<ffffffff820610f8>] ? kthread+0xb8/0xd0
[  343.459794]  [<ffffffff825b49bf>] ? ret_from_fork+0x1f/0x40
[  343.459827]  [<ffffffff82061040>] ? kthread_worker_fn+0x140/0x140
[  343.459862] Code: 89 0c 07 48 8d 4a 01 4d 8b 03 48 8b 06 65 49 0f c7
08 0f 94 c0 84 c0 74 c6 5b c3 49 8b 02 f6 c4 40 75 0a 49 8b 42 20 a8 01
75 02 <0f> 0b 49 8b 02 31 f6 f6 c4 40 74 04 41 8b 72 6c 4c 89 d7 e9 81
[  343.460211] RIP  [<ffffffff82131c47>] kfree+0xb7/0xf0
[  343.460251]  RSP <ffff8807f94bbdd8>
[  343.460280] ---[ end trace acf372175769c710 ]---
[  343.590276] Kernel panic - not syncing: Fatal exception
[  343.590432] Kernel Offset: 0x1000000 from 0xffffffff81000000
(relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[  343.695567] Rebooting in 60 seconds..%                            


Config is attached.

I am not subscribed to the list, please CC. I'll happily provide
further testing.

Kind Regards
Malte
View attachment "config-4.7.0-gateway" of type "text/x-mpsub" (117875 bytes)