[Xen-users] kernel BUG at /usr/src/linux-stable/drivers/net/xen-netback/netback.c:540!

[Hans de Bruin <jmdebruin@xxxxxxxxx>]

Hi

I just opgraded my test-host and guest to 3.14.27. Which probable was 
not a good idea. A nfsroot guest triggers a kernel BUG in the host when 
is starts its mediatomb deamon. Before the upgrade the host and guest 
were running 3.14.23:

[   87.011325] ------------[ cut here ]------------
[   87.011350] kernel BUG at 
/usr/src/linux-stable/drivers/net/xen-netback/netback.c:540!
[   87.011386] invalid opcode: 0000 [#1] SMP
[   87.011397] Modules linked in: xt_physdev xen_pciback xen_gntalloc 
xen_gntdev xt_multiport nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter 
ip6_tables xt_nat xt_conntrack xt_tcpudp xt_LOG iptable_nat 
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack 
iptable_filter ip_tables x_tables bridge stp llc ipv6 lp fuse i915 video 
r8169 8139too drm_kms_helper coretemp i2c_dev evdev intel_agp gpio_ich 
i2c_i801 mii processor ppdev drm intel_gtt agpgart lpc_ich 
snd_hda_codec_realtek snd_hda_codec_generic uhci_hcd ehci_pci ehci_hcd 
thermal_sys microcode snd_hda_intel i2c_algo_bit snd_hda_codec snd_hwdep 
i2c_core snd_pcm snd_timer snd soundcore parport_pc parport hwmon button 
loop
[   87.011550] CPU: 1 PID: 1221 Comm: vif1.0 Not tainted 3.14.27 #8
[   87.011560] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./To be filled by O.E.M., BIOS 080015  03/19/2010
[   87.011574] task: ffff8800701c1060 ti: ffff88005d1be000 task.ti: 
ffff88005d1be000
[   87.011584] RIP: e030:[<ffffffff81a60df8>]  [<ffffffff81a60df8>] 
xenvif_rx_action+0x888/0x890
[   87.011606] RSP: e02b:ffff88005d1bfdb8  EFLAGS: 00010297
[   87.011615] RAX: 0000000000000001 RBX: ffff88005d1bfdec RCX: 
3fffffffffffff00
[   87.011625] RDX: 0000000000000013 RSI: ffff8800574b5ee8 RDI: 
00000000000b195f
[   87.011635] RBP: ffff88005d1bfe68 R08: ffff88005d1bfdec R09: 
0000000000000001
[   87.011645] R10: ffff88005ccd0840 R11: ffff88005ccd7498 R12: 
0000000000016f8b
[   87.011654] R13: ffff88005ccd0840 R14: ffff8800574b5ee8 R15: 
ffff88005ccd0840
[   87.011672] FS:  00007fe579d85900(0000) GS:ffff88007f280000(0000) 
knlGS:0000000000000000
[   87.011683] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[   87.011692] CR2: 00007f4442b3e000 CR3: 000000005d127000 CR4: 
0000000000000660
[   87.011703] Stack:
[   87.011709]  ffff88005d1bfdec ffff88005ccd7360 00016f8b7f292d40 
ffff88005ccd0840
[   87.011724]  ffff88005ccd0840 0000001200000000 0000000075d2fb80 
ffff88005d1bfdf0
[   87.011739]  ffff88005d1bfdf0 ffff88005d1bfe00 ffff88005d1bfe00 
0000000000000000
[   87.011754] Call Trace:
[   87.011768]  [<ffffffff81a61874>] xenvif_kthread+0xa4/0x230
[   87.011782]  [<ffffffff810d26d0>] ? prepare_to_wait_event+0x100/0x100
[   87.011796]  [<ffffffff81a617d0>] ? xenvif_stop_queue+0x60/0x60
[   87.011809]  [<ffffffff810b1f82>] kthread+0xd2/0xf0
[   87.011821]  [<ffffffff810b1eb0>] ? kthread_create_on_node+0x180/0x180
[   87.011835]  [<ffffffff81c46dfc>] ret_from_fork+0x7c/0xb0
[   87.011847]  [<ffffffff810b1eb0>] ? kthread_create_on_node+0x180/0x180
[   87.011856] Code: 00 e9 57 fa ff ff c6 85 7c ff ff ff 00 e9 24 fc ff 
ff 83 c8 03 e9 aa fd ff ff 45 31 c0 b8 04 00 00 00 e9 82 fd ff ff 0f 0b 
0f 0b <0f> 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 48 8b 97 18 6b 00 00 55
[   87.011974] RIP  [<ffffffff81a60df8>] xenvif_rx_action+0x888/0x890
[   87.011988]  RSP <ffff88005d1bfdb8>
[   87.011997] ---[ end trace 3690b03a5c0d0712 ]---


root@sol(test):/usr/src/linux-stable# xl info
host                   : sol
release                : 3.14.27
version                : #8 SMP Wed Dec 17 14:40:03 CET 2014
machine                : x86_64
nr_cpus                : 4
max_cpu_id             : 3
nr_nodes               : 1
cores_per_socket       : 2
threads_per_core       : 2
cpu_mhz                : 1666
hw_caps                : 
bfebfbff:20100800:00000000:00000900:0040e31d:00000000:00000001:00000000
virt_caps              :
total_memory           : 4086
free_memory            : 1476
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 3
xen_extra              : .3
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          :
xen_commandline        : dom0_mem=2G dom0_max_vcpus=4 loglvl=all 
guest_loglvl=all com1=115200,8n1 console=com1,vga
cc_compiler            : gcc (GCC) 4.8.2
cc_compile_by          : root
cc_compile_domain      : system
cc_compile_date        : Sat Nov 15 17:54:36 CET 2014
xend_config_format     : 4
root@sol(test):/usr/src/linux-stable#

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