On Wed, Sep 2, 2015 at 3:16 PM, Ryota Ozaki <ozak...@netbsd.org> 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... ozaki-r > > ozaki-r > > On Tue, Sep 1, 2015 at 8:14 PM, Paul Goyette <p...@vps1.whooppee.com> wrote: >> On Mon, 31 Aug 2015, Ryota Ozaki wrote: >> >>> Hi, >>> >>> I've committed a fix for rt_refcnt. Could you try again >>> with -current? (though I'm not sure the fix is related to >>> the issue...) >> >> >> The fix is not helping on my situation, either! >> >> Here is the latest info, based on a kernel from today's sources... >> >> (gdb) target kvm netbsd.0.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(); >> #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=0xffffffff80d2d8b8 "kernel %sassertion \"%s\" failed: file \"%s\", >> line %d ", ap=ap@entry=0xfffffe810f5a48a8) >> at /build/netbsd-local/src/sys/kern/subr_prf.c:342 >> #2 0xffffffff80a7d763 in kern_assert ( >> fmt=fmt@entry=0xffffffff80d2d8b8 "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=0xfffffe821c830060) >> at /build/netbsd-local/src/sys/net/route.h:441 >> #4 0xffffffff8082b2a5 in rtcache_invariants (ro=0xfffffe821c830060) >> at /build/netbsd-local/src/sys/net/route.h:441 >> #5 rtcache_getdst (ro=0xfffffe821c830060) >> at /build/netbsd-local/src/sys/net/route.h:467 >> #6 rtcache_lookup2 (ro=0xfffffe821c830060, >> dst=dst@entry=0xfffffe810f5a495c, >> clone=clone@entry=1, hitp=hitp@entry=0xfffffe810f5a4958) >> at /build/netbsd-local/src/sys/net/route.c:1493 >> #7 0xffffffff805070f7 in rtcache_lookup1 (clone=1, dst=0xfffffe810f5a495c, >> ro=<optimized out>) at /build/netbsd-local/src/sys/net/route.h:449 >> #8 selectroute (dstsock=dstsock@entry=0xfffffe810f5a4bc4, >> opts=opts@entry=0xfffffe81f7af67d0, mopts=<optimized out>, >> ro=ro@entry=0x0, retifp=retifp@entry=0xfffffe810f5a4a10, >> retrt=retrt@entry=0xfffffe810f5a4a18, clone=1, >> norouteok=norouteok@entry=1) >> at /build/netbsd-local/src/sys/netinet6/in6_src.c:665 >> #9 0xffffffff8050723a in in6_selectif (retifp=0xfffffe810f5a4a10, ro=0x0, >> mopts=<optimized out>, opts=0xfffffe81f7af67d0, >> dstsock=0xfffffe810f5a4bc4) >> at /build/netbsd-local/src/sys/netinet6/in6_src.c:724 >> #10 in6_selectsrc (dstsock=dstsock@entry=0xfffffe810f5a4bc4, >> opts=opts@entry=0xfffffe81f7af67d0, mopts=<optimized out>, >> ro=ro@entry=0xfffffe821c830060, laddr=laddr@entry=0xfffffe821c8300a0, >> ifpp=ifpp@entry=0xfffffe810f5a4ae0, >> errorp=errorp@entry=0xfffffe810f5a4adc) >> at /build/netbsd-local/src/sys/netinet6/in6_src.c:204 >> #11 0xffffffff80800869 in rip6_output (m=m@entry=0xfffffe821c249400, >> so=so@entry=0xfffffe8219325db0, >> dstsock=dstsock@entry=0xfffffe810f5a4bc4, >> 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=0xfffffe81effcd638, m=0xfffffe821c249400, so=0xfffffe8219325db0) >> at /build/netbsd-local/src/sys/netinet6/raw_ip6.c:893 >> #13 rip6_send_wrapper (a=0xfffffe8219325db0, b=0xfffffe821c249400, >> c=0xfffffe81effcd638, d=0x0, e=<optimized out>) >> at /build/netbsd-local/src/sys/netinet6/raw_ip6.c:966 >> #14 0xffffffff80999251 in sosend (so=0xfffffe8219325db0, >> addr=0xfffffe81effcd638, uio=0xfffffe810f5a4d10, top=0xfffffe821c249400, >> control=0x0, flags=<optimized out>, l=0xfffffe81f455c4c0) >> at /build/netbsd-local/src/sys/kern/uipc_socket.c:1064 >> #15 0xffffffff809a0785 in do_sys_sendmsg_so (l=l@entry=0xfffffe81f455c4c0, >> s=s@entry=4, so=<optimized out>, fp=0xfffffe81f1ac6380, >> mp=mp@entry=0xfffffe810f5a4e58, flags=flags@entry=0, >> retsize=retsize@entry=0xfffffe810f5a4eb8) >> at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:622 >> #16 0xffffffff809a0ad2 in do_sys_sendmsg (l=l@entry=0xfffffe81f455c4c0, s=4, >> mp=mp@entry=0xfffffe810f5a4e58, flags=0, >> retsize=retsize@entry=0xfffffe810f5a4eb8) >> at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:672 >> #17 0xffffffff809a0b9b in sys_sendmsg (l=0xfffffe81f455c4c0, >> uap=0xfffffe810f5a4f00, retval=0xfffffe810f5a4eb8) >> at /build/netbsd-local/src/sys/kern/uipc_syscalls.c:528 >> #18 0xffffffff80901f6c in sy_call (rval=0xfffffe810f5a4eb8, >> uap=0xfffffe810f5a4f00, l=0xfffffe81f455c4c0, >> sy=0xffffffff810ef240 <sysent+672>) >> at /build/netbsd-local/src/sys/sys/syscallvar.h:65 >> #19 sy_invoke (code=28, rval=0xfffffe810f5a4eb8, uap=0xfffffe810f5a4f00, >> l=0xfffffe81f455c4c0, sy=0xffffffff810ef240 <sysent+672>) >> at /build/netbsd-local/src/sys/sys/syscallvar.h:94 >> #20 syscall (frame=0xfffffe810f5a4f00) >> at /build/netbsd-local/src/sys/arch/x86/x86/syscall.c:156 >> #21 0xffffffff80100691 in Xsyscall () >> #3 0xffffffff80a8421a in rtcache_invariants (ro=0xfffffe821c830060) >> 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 *) 0xfffffe81fc5c39a0 >> (gdb) print ro->_ro_rt->rt_refcnt >> $2 = 0 >> (gdb) >> >> >> >> To reproduce this, I simply bring up my openvpn tunnel, which has IPv6 >> addresses on both ends. I can successfully ping6 the remote tunnel >> end-point (ie, the "directly attached neighbor"). However, as soon as I try >> to ping6 to something more than 1 hop away (I've been using ftp.netbet.org >> for testing!) it crashes as above. >> >> This is on a GENERIC amd64 kernel, built from sources updated via anoncvs on >> 2015-09-01 at 06:53:13 UTC. >> >> >> >> ------------------------------------------------------------------------- >> | 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 | >> -------------------------------------------------------------------------
