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Re: "ro->_ro_rt ==NULL || ro->_ro_rt->rt_refcnt > 0" failed
On Wed, 2 Sep 2015, Ryota Ozaki wrote:
On Wed, Sep 2, 2015 at 3:16 PM, Ryota Ozaki <ozaki-r%netbsd.org@localhost> wrote:
Hi Paul and Jun,
Thank you for your reporting!
Now I can reproduce the issue quickly using openvpn.
So I would provide a fix soon (hopefully).
Oops. The tested kernel was built at 8/24. A kernel built today
doesn't reproduce the issue...
Hmmm, I don't know what kernel you have from Aug 24. But a kernel that
was built from up-to-date sources less than one hour ago (and with no
subsequent CVS commits!) still fails.
This kernel identifies itself as
%uname -a
NetBSD pokey.whooppee.com 7.99.21 NetBSD 7.99.21 (GENERIC) #0: Wed Sep 2 15:49:03 PHT 2015 paul%pokey.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/GENERIC amd64
And I have attached the Xterm log from my gdb session (after running
tr -d '\r'
to remove trailing ^M characters!)
-------------------------------------------------------------------------
| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
-------------------------------------------------------------------------
(gdb) target kvm netbsd.1.core
0xffffffff8069eda5 in cpu_reboot (howto=howto@entry=260,
bootstr=bootstr@entry=0x0)
at /build/netbsd-local/src/sys/arch/amd64/amd64/machdep.c:671
671 dumpsys();
(gdb) bt
#0 0xffffffff8069eda5 in cpu_reboot (howto=howto@entry=260,
bootstr=bootstr@entry=0x0)
at /build/netbsd-local/src/sys/arch/amd64/amd64/machdep.c:671
#1 0xffffffff808e4cc4 in vpanic (
fmt=0xffffffff80d2d938 "kernel %sassertion \"%s\" failed: file \"%s\", line %d ", ap=ap@entry=0xfffffe810f53c8a8)
at /build/netbsd-local/src/sys/kern/subr_prf.c:342
#2 0xffffffff80a7d763 in kern_assert (
fmt=fmt@entry=0xffffffff80d2d938 "kernel %sassertion \"%s\" failed: file \"%s\", line %d ") at /build/netbsd-local/src/sys/lib/libkern/kern_assert.c:51
#3 0xffffffff80a8421a in rtcache_invariants (ro=0xfffffe821c720060)
at /build/netbsd-local/src/sys/net/route.h:441
#4 0xffffffff8082b2a5 in rtcache_invariants (ro=0xfffffe821c720060)
at /build/netbsd-local/src/sys/net/route.h:441
#5 rtcache_getdst (ro=0xfffffe821c720060)
at /build/netbsd-local/src/sys/net/route.h:467
#6 rtcache_lookup2 (ro=0xfffffe821c720060, dst=dst@entry=0xfffffe810f53c95c,
clone=clone@entry=1, hitp=hitp@entry=0xfffffe810f53c958)
at /build/netbsd-local/src/sys/net/route.c:1493
#7 0xffffffff805070f7 in rtcache_lookup1 (clone=1, dst=0xfffffe810f53c95c,
ro=<optimized out>) at /build/netbsd-local/src/sys/net/route.h:449
#8 selectroute (dstsock=dstsock@entry=0xfffffe810f53cbc4,
opts=opts@entry=0xfffffe81f6c227d0, mopts=<optimized out>,
ro=ro@entry=0x0, retifp=retifp@entry=0xfffffe810f53ca10,
retrt=retrt@entry=0xfffffe810f53ca18, clone=1, norouteok=norouteok@entry=1)
at /build/netbsd-local/src/sys/netinet6/in6_src.c:665
#9 0xffffffff8050723a in in6_selectif (retifp=0xfffffe810f53ca10, ro=0x0,
mopts=<optimized out>, opts=0xfffffe81f6c227d0, dstsock=0xfffffe810f53cbc4)
at /build/netbsd-local/src/sys/netinet6/in6_src.c:724
#10 in6_selectsrc (dstsock=dstsock@entry=0xfffffe810f53cbc4,
opts=opts@entry=0xfffffe81f6c227d0, mopts=<optimized out>,
ro=ro@entry=0xfffffe821c720060, laddr=laddr@entry=0xfffffe821c7200a0,
ifpp=ifpp@entry=0xfffffe810f53cae0, errorp=errorp@entry=0xfffffe810f53cadc)
at /build/netbsd-local/src/sys/netinet6/in6_src.c:204
#11 0xffffffff80800869 in rip6_output (m=m@entry=0xfffffe821ce56400,
---Type <return> to continue, or q <return> to quit---
so=so@entry=0xfffffe81f1aa9000, dstsock=dstsock@entry=0xfffffe810f53cbc4,
control=control@entry=0x0)
at /build/netbsd-local/src/sys/netinet6/raw_ip6.c:447
#12 0xffffffff80800e08 in rip6_send (l=<optimized out>, control=0x0,
nam=0xfffffe821c8d7238, m=0xfffffe821ce56400, so=0xfffffe81f1aa9000)
at /build/netbsd-local/src/sys/netinet6/raw_ip6.c:893
#13 rip6_send_wrapper (a=0xfffffe81f1aa9000, b=0xfffffe821ce56400,
c=0xfffffe821c8d7238, d=0x0, e=<optimized out>)
at /build/netbsd-local/src/sys/netinet6/raw_ip6.c:966
#14 0xffffffff80999251 in sosend (so=0xfffffe81f1aa9000,
addr=0xfffffe821c8d7238, uio=0xfffffe810f53cd10, top=0xfffffe821ce56400,
control=0x0, flags=<optimized out>, l=0xfffffe821d7c82c0)
at /build/netbsd-local/src/sys/kern/uipc_socket.c:1064
#15 0xffffffff809a0785 in do_sys_sendmsg_so (l=l@entry=0xfffffe821d7c82c0,
s=s@entry=4, so=<optimized out>, fp=0xfffffe81fafccb80,
mp=mp@entry=0xfffffe810f53ce58, flags=flags@entry=0,
retsize=retsize@entry=0xfffffe810f53ceb8)
at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:622
#16 0xffffffff809a0ad2 in do_sys_sendmsg (l=l@entry=0xfffffe821d7c82c0, s=4,
mp=mp@entry=0xfffffe810f53ce58, flags=0,
retsize=retsize@entry=0xfffffe810f53ceb8)
at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:672
#17 0xffffffff809a0b9b in sys_sendmsg (l=0xfffffe821d7c82c0,
uap=0xfffffe810f53cf00, retval=0xfffffe810f53ceb8)
at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:528
#18 0xffffffff80901f6c in sy_call (rval=0xfffffe810f53ceb8,
uap=0xfffffe810f53cf00, l=0xfffffe821d7c82c0,
sy=0xffffffff810ef240 <sysent+672>)
at /build/netbsd-local/src/sys/sys/syscallvar.h:65
#19 sy_invoke (code=28, rval=0xfffffe810f53ceb8, uap=0xfffffe810f53cf00,
l=0xfffffe821d7c82c0, sy=0xffffffff810ef240 <sysent+672>)
at /build/netbsd-local/src/sys/sys/syscallvar.h:94
#20 syscall (frame=0xfffffe810f53cf00)
at /build/netbsd-local/src/sys/arch/x86/x86/syscall.c:156
#21 0xffffffff80100691 in Xsyscall ()
(gdb) ft r 3
#3 0xffffffff80a8421a in rtcache_invariants (ro=0xfffffe821c720060)
at /build/netbsd-local/src/sys/net/route.h:441
441 KASSERT(ro->_ro_rt == NULL || ro->_ro_rt->rt_refcnt > 0);
(gdb) print ro->_ro_rt
$1 = (struct rtentry *) 0xfffffe81f56629a0
(gdb) print ro->_ro_rt, ->rt_refcnt
$2 = 0
(gdb)
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