rpc.lockd exiting just after startup @r240811

[Konstantin Belousov]

On Sun, Sep 23, 2012 at 06:04:14AM -0700, David Wolfskill wrote:
> This (rpc.lockd exiting rather quickly) is happening on my home "build
> machine"; in hindsight, the first symptom I saw was from the
> cron-initiated attempt to perform "svn update" on the NFS-resident
> /usr/ports:
> 
> svn: E155036: Please see the 'svn upgrade' command
> svn: E155036: Working copy '/usr/ports' is an old development version (format 12); to upgrade it, use a format 18 client, then use 'tools/dev/wc-ng/bump-to-19.py', then use the current client
> 
> which, I admit, confused me a great deal for a while.
> 
> The machine in question is intended to do this every night -- and
> the preceding night, there was no problem, so while I didn't actually
> check explicitly to verify that rpc.lockd was running, /usr/ports
> did get updated.
> 
> I tried "sh -x /etc/rc.d/lockd restart", which wasn't exceptionally
> revealing, except to verify that I was trying to start rpc.lockd with no
> arguments.
> 
> So I did "ktrace -di /usr/sbin/rpc.lockd"; here's a cut/paste of the
> last page or so of the resulting kdump output:
> 
> ...
>   2336 rpc.lockd CALL  connect(0x3,0xbfbfce30,0x6a)
>   2336 rpc.lockd STRU  struct sockaddr { AF_LOCAL, /var/run/logpriv }
>   2336 rpc.lockd NAMI  "/var/run/logpriv"
>   2336 rpc.lockd RET   connect 0
>   2336 rpc.lockd CALL  sendto(0x3,0xbfbfd388,0x27,0,0,0)
>   2336 rpc.lockd GIO   fd 3 wrote 39 bytes
>        "<30>Sep 23 05:38:34 rpc.lockd: Starting"
>   2336 rpc.lockd RET   sendto 39/0x27
>   2336 rpc.lockd CALL  sigaction(SIGALRM,0xbfbfdc70,0)
>   2336 rpc.lockd RET   sigaction 0
>   2336 rpc.lockd CALL  nlm_syscall(0,0x1e,0x4,0x2841d0c0)
>   2336 rpc.lockd RET   nlm_syscall -1 errno 14 Bad address
>   2336 rpc.lockd CALL  sigprocmask(SIG_BLOCK,0x2806ee0c,0xbfbfda88)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_SETMASK,0x2806ee20,0)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_BLOCK,0x2806ee0c,0xbfbfd208)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_SETMASK,0x2806ee20,0)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_BLOCK,0x2806ee0c,0xbfbfd208)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_SETMASK,0x2806ee20,0)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_BLOCK,0x2806ee0c,0xbfbfd208)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_SETMASK,0x2806ee20,0)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_BLOCK,0x2806ee0c,0xbfbfd208)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  sigprocmask(SIG_SETMASK,0x2806ee20,0)
>   2336 rpc.lockd RET   sigprocmask 0
>   2336 rpc.lockd CALL  exit(0x1)
> 
> I've attached a gzipped copy of the complete file in case that's
> of interest or use.
> 
> When lockd was last working, the machine was running:
> 
> FreeBSD freebeast.catwhisker.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #474 240772M: Fri Sep 21 05:03:35 PDT 2012     root at freebeast.catwhisker.org:/usr/obj/usr/src/sys/GENERIC  i386
> 
> Last night, it was running:
> 
> FreeBSD freebeast.catwhisker.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #475 240811M: Sat Sep 22 05:02:51 PDT 2012     root at freebeast.catwhisker.org:/usr/obj/usr/src/sys/GENERIC  i386
> 
> and after updating this morning, it is now running:
> 
> FreeBSD freebeast.catwhisker.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #476 240856M: Sun Sep 23 05:10:13 PDT 2012     root at freebeast.catwhisker.org:/usr/obj/usr/src/sys/GENERIC  i386
> 
> and that's the environment in which the above ktrace/kdump was produced.

Try to revert the r240799. If this does not help, then some digging with
gdb would be needed to see why kernel dislikes the buffer. Well, the same
digging would be needed even if the revert helps.
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