Hi,
Yesterday an upstream switch reboot segfaulted all our ovs-vswitchd
instances at the same time. There's no MPLS or flow config in our OVS
setups, they run a bridge over a bond and several 802.1q interfaces. I
mention it here, though, as the backtrace starts similarly, so maybe
this is a more general issue:
Core was generated by `ovs-vswitchd unix:/var/run/openvswitch/db.sock
-vconsole:emer -vsyslog:err -vfi'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 nl_attr_get_size (nla=0x1ffffffffffff) at ../lib/netlink.c:516
516 ../lib/netlink.c: No such file or directory.
(gdb) bt
#0 nl_attr_get_size (nla=0x1ffffffffffff) at ../lib/netlink.c:516
#1 0x000000000046fd76 in parse_l2_5_onward (attrs=0x7f954eb165b0,
present_attrs=2097216,
out_of_range_attr=0, expected_attrs=64, flow=0x7f954eb16c90,
key=0x7f954eb18fa4, key_len=136,
src_flow=0x7f954eb16c90) at ../lib/odp-util.c:2970
#2 0x0000000000470ba8 in parse_8021q_onward (src_flow=<optimized out>,
key_len=<optimized out>,
key=<optimized out>, flow=<optimized out>, expected_attrs=64,
out_of_range_attr=0,
present_attrs=2097216, attrs=<optimized out>) at ../lib/odp-util.c:3284
#3 odp_flow_key_to_flow__ (key=0x7f954eb18fa4, key_len=136,
flow=0x7f954eb16c90,
src_flow=0x7f954eb16c90) at ../lib/odp-util.c:3377
#4 0x0000000000470f68 in odp_flow_key_to_flow (key=key@entry=0x7f954eb18fa4,
key_len=key_len@entry=136, flow=flow@entry=0x7f954eb16c90) at
../lib/odp-util.c:3410
#5 0x0000000000434bcd in xlate_receive (backer=0xb3aa40,
packet=0x7f954eb18f00, key=0x7f954eb18fa4,
key_len=136, flow=0x7f954eb16c90, ofproto=0x7f954eb168b8,
ipfix=0x7f954eb168c8,
sflow=0x7f954eb168c0, netflow=0x0, odp_in_port=0x7f954eb168b4)
at ../ofproto/ofproto-dpif-xlate.c:640
#6 0x000000000042e728 in read_upcalls (handler=<optimized out>,
handler=<optimized out>,
misses=<optimized out>, miss_buf=<optimized out>, upcalls=<optimized out>)
at ../ofproto/ofproto-dpif-upcall.c:788
#7 udpif_upcall_handler (arg=0x7f954eb18ef0) at
../ofproto/ofproto-dpif-upcall.c:525
#8 0x0000000000494eb1 in ovsthread_wrapper (aux_=<optimized out>) at
../lib/ovs-thread.c:322
#9 0x00007f95505f3064 in start_thread (arg=0x7f954eb30700) at
pthread_create.c:309
#10 0x00007f954fe1f62d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
The following restart attempts also segfaulted. The above core file is
probably from the last attempt. Later a full OVS restart fixed the
issue.
Identically positioned 2.5.2-0ubuntu0.16.04.3~cloud0 OVS versions (in
the same topology) had not problem at the same time.
--
Regards,
Feri
