Date: Tue, 28 Jul 2015 16:05:33 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: David Wolfskill <david@catwhisker.org>, Ian Lepore <ian@freebsd.org>, "current@freebsd.org" <current@freebsd.org> Subject: Re: Segmentation fault running ntpd Message-ID: <CAJ-Vmom_PX4rA_z-Vwv3P2TT=Y%2BbuM624PB8c7n5iq2AU%2BdDWw@mail.gmail.com> In-Reply-To: <20150724130317.GS27865@albert.catwhisker.org> References: <20150719183600.GF1217@albert.catwhisker.org> <20150724130317.GS27865@albert.catwhisker.org>
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Is this still happening for you? -a On 24 July 2015 at 06:03, David Wolfskill <david@catwhisker.org> wrote: > On Sun, Jul 19, 2015 at 11:36:00AM -0700, David Wolfskill wrote: >> On Sun, Jul 19, 2015 at 10:24:11AM -0600, Ian Lepore wrote: >> > ... >> > Was there anything (at all) in /var/log/messages about ntpd? Even the >> > routine messages (such as what interfaces it binds to) might give a bit >> > of a clue about how far it got in its init before it died. >> > .... >> >> Sorry; there might have been something yesterday... >> If I do get another recurrence, I'll try to gather a bit more >> information. >> .... > > OK; got another one. > > This time, I have the complete /var/log/messages for a verbose boot, > from that boot to just a bit after the ntpd crash; it's in > <http://www.catwhisker.org/~david/FreeBSD/head>; as of the moment, that > contains: > > [PARENTDIR] Parent Directory - > [ ] CANARY 2015-03-22 10:03 15K > [ ] CANARY.gz 2015-03-22 10:03 6.3K > [ ] ntpd.core 2015-07-24 05:31 13M > [ ] ntpd.core.gz 2015-07-24 05:31 124K > [TXT] ntpd_crash_msgs.txt 2015-07-24 05:40 138K > [ ] ntpd_crash_msgs.txt.gz 2015-07-24 05:40 19K > > This was running: > > FreeBSD g1-245.catwhisker.org 11.0-CURRENT FreeBSD 11.0-CURRENT #133 r285836M/285836:1100077: Fri Jul 24 05:24:41 PDT 2015 root@g1-245.catwhisker.org:/common/S4/obj/usr/src/sys/CANARY amd64 > > > Trying "gdb /usr/obj/usr/src/usr.sbin/ntp/ntpd/ntpd ntpd.core" still > doesn't help much: > > This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)... > Core was generated by `ntpd'. > Program terminated with signal 11, Segmentation fault. > Reading symbols from /lib/libm.so.5...(no debugging symbols found)...done. > ... > Loaded symbols for /libexec/ld-elf.so.1 > #0 0x00000008011cd6a0 in sbrk () from /lib/libc.so.7 > [New Thread 801c07400 (LWP 100133/<unknown>)] > [New Thread 801c06400 (LWP 100132/<unknown>)] > (gdb) bt > #0 0x00000008011cd6a0 in sbrk () from /lib/libc.so.7 > #1 0x00000008ccbd4f34 in ?? () > #2 0x0000000000000005 in ?? () > #3 0x0000000801800448 in ?? () > #4 0x00000008011ca888 in sbrk () from /lib/libc.so.7 > #5 0x00000008018000c8 in ?? () > #6 0x00000008018000c0 in ?? () > #7 0x0000000000000208 in ?? () > #8 0x0000000801c32fb0 in ?? () > #9 0x0000000000000001 in ?? () > #10 0x0000000801cc20c8 in ?? () > #11 0x0000000000000030 in ?? () > #12 0x0000000801cc20c8 in ?? () > #13 0x00007fffffffe480 in ?? () > #14 0x00000008011cd240 in sbrk () from /lib/libc.so.7 > #15 0x0000000000000280 in ?? () > #16 0x00000008014bbc70 in malloc_message () from /lib/libc.so.7 > #17 0x00000008018000c0 in ?? () > #18 0x0000000801800448 in ?? () > #19 0x0000000000000032 in ?? () > #20 0x0000000801800458 in ?? () > #21 0x00000008014bbc68 in malloc_message () from /lib/libc.so.7 > #22 0x0000000801cc2000 in ?? () > #23 0x00000008014bba60 in malloc_message () from /lib/libc.so.7 > #24 0x0000000801cc20d8 in ?? () > #25 0x00000000000000a0 in ?? () > #26 0x0000000000000208 in ?? () > #27 0x00007fffffffe4d0 in ?? () > #28 0x00000008011bdd7a in _malloc_thread_cleanup () from /lib/libc.so.7 > Previous frame inner to this frame (corrupt stack?) > (gdb) > > > I am presently suspecting that it's a bit dependent on ... well, "timing". > > I have my ~/.xsession set up so that once I've entered the passphrase(s) > for my SSH private key(s), scripts start running to establish > connections to other machines -- e.g., open an xterm locally, ssh > over to my mailhub and (re-)establish a tmux session on that machine > where I run mutt to read & write email (such as this message). > > While that almost always Just Works in stable/10, it's rather ... > spottier ... in head -- I'd say it's about a 50% probability that it will > work, vs. the ssh connection attempt hanging, and eventually timing out. > But if I've waited (say) 30 seconds or so, I can establish such a > connection easily. > > Granted, I am using wireless (802.11), but I get a sense that "things" > are claimed to be "ready to go" a bit prematurely -- at least sometimes. > > Peace, > david > -- > David H. Wolfskill david@catwhisker.org > Those who murder in the name of God or prophet are blasphemous cowards. > > See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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