Hello OVS team,
I have a ovs-vswitched crash of ovs version 2.6.1. From the backtrace I could
see that the crash is because of __nr_readers overflow.
(gdb) bt
#0 0x00007f31539f71d7 in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f31539f88c8 in __GI_abort () at abort.c:90
#2 0x00007f31558287ae in ovs_abort_valist (err_no=<optimized out>,
format=<optimized out>, args=args@entry=0x7f30a3ff9f20) at lib/util.c:335
#3 0x00007f3155828844 in ovs_abort (err_no=<optimized out>,
format=format@entry=0x7f31558ea6b0 "%s: pthread_%s_%s failed") at lib/util.c:327
#4 0x00007f31557fb162 in ovs_rwlock_rdlock_at (l_=0x7f3156ff5d98,
where=where@entry=0x7f31558d2420 "ofproto/ofproto-dpif-xlate.c:2152") at
lib/ovs-thread.c:77
#5 0x00007f3155763e37 in update_learning_table (xbridge=0x7f31570583c0,
flow=0x7f3094006ec0, wc=0x7f30a3ffa0b0, vlan=2226, in_xbundle=0x7f3156fdf240)
at ofproto/ofproto-dpif-xlate.c:2152
#6 0x00007f3155765b89 in xlate_cache_normal (ofproto=<optimized out>,
flow=0x7f3094006ec0, vlan=2226) at ofproto/ofproto-dpif-xlate.c:5857
#7 0x00007f315576def0 in xlate_push_stats (xcache=<optimized out>,
stats=stats@entry=0x7f30a3ffa3f0) at ofproto/ofproto-dpif-xlate.c:5898
#8 0x00007f315575f282 in revalidate_ukey (udpif=udpif@entry=0x7f3156fe4420,
ukey=ukey@entry=0x7f30d0007c90, stats=stats@entry=0x7f30a3ffcc58,
odp_actions=odp_actions@entry=0x7f30a3ffaee0,
reval_seq=reval_seq@entry=8575315723, recircs=recircs@entry=0x7f30a3ffaed0) at
ofproto/ofproto-dpif-upcall.c:1844
#9 0x00007f3155761ad4 in revalidate (revalidator=0x7f3156fc8008) at
ofproto/ofproto-dpif-upcall.c:2199
#10 0x00007f3155761dcb in udpif_revalidator (arg=0x7f3156fc8008) at
ofproto/ofproto-dpif-upcall.c:881
#11 0x00007f31557fb066 in ovsthread_wrapper (aux_=<optimized out>) at
lib/ovs-thread.c:342
#12 0x00007f31546ebdc5 in start_thread (arg=0x7f30a3fff700) at
pthread_create.c:308
#13 0x00007f3153ab976d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) frame 4
#4 0x00007f31557fb162 in ovs_rwlock_rdlock_at (l_=0x7f3156ff5d98,
where=where@entry=0x7f31558d2420 "ofproto/ofproto-dpif-xlate.c:2152") at
lib/ovs-thread.c:77
77 LOCK_FUNCTION(rwlock, rdlock)
(gdb) p * l
$2 = {lock = {__data = {__lock = 0, __nr_readers = 4294967295, __readers_wakeup
= 72951523, __writer_wakeup = 128782028, __nr_readers_queued = 0,
__nr_writers_queued = 0,
__writer = 0, __shared = 0, __pad1 = 0, __pad2 = 0, __flags = 0}, __size
= "\000\000\000\000\377\377\377\377\343&Y\004\314\016\255\a", '\000' <repeats
39 times>,
__align = -4294967296}, where = 0x7f31558cb9de "<unlocked>"}
ovs-vswitchd --version
ovs-vswitchd (Open vSwitch) 2.6.1
cat /proc/version
Linux version 3.10.0-514.26.2.el7.x86_64 ([email protected]) (gcc
version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Jul 4 15:04:05 UTC
2017
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