[OpenAFS] fetchmail / afs / segfault revisited

[Pavel Semerad]

  There were a problem with linux kernels >= 2.4.10 . When file
was open with O_SYNC flag (as fetchmail does), write to this file
caused a segfault. I only know that current CVS version is OK
(tested with kernels 2.4.17, 2.4.18). I don't know who and when
did repair it.

Pavel Semerad

> Hello All
> 
> I'm trying to run fetchmail from my AFS account and it segfaults
> immediately. I mentioned this before but couldn't find anyone having
> similar failures :-(
> 
> This time, I may have found the fault using strace, but I'm not sure
> how to interpret it. It looks like fetchmail may not be running with
> my token, even though it's running from my ~/bin. Here is the end of
> the strace output:
> 
> <...>
> umask(077)                              = 02
> rt_sigaction(SIGABRT, {0x8053a40, [ABRT], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> rt_sigaction(SIGINT, {0x8053a40, [INT], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> rt_sigaction(SIGTERM, {0x8053a40, [TERM], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> rt_sigaction(SIGALRM, {0x8053a40, [ALRM], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> rt_sigaction(SIGPIPE, {0x8053a40, [PIPE], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> rt_sigaction(SIGQUIT, {0x8053a40, [QUIT], SA_RESTART|0x4000000},
>    {SIG_DFL}, 8) = 0
> open("/afs/vonbek.dhs.org/usr/johnnyb/.fetchmail.pid",
>       O_WRONLY|O_CREAT|O_EXCL|O_SYNC, 0666) = 3
> getpid()                                = 7695
> write(3, "7695", 4 <unfinished ...>
> +++ killed by SIGSEGV +++
> 
> 
> I've cleaned it up a little to deal with the hard wrap I use in mutt.
> It doesn't seem like write() is failing, it seems like write() doesn't
> even get to run. It looks like it's being interrupted, correct ?
> 
> Any insight would be appreciated!
> 
> JB
> 
> +---------------------------------
> | John Bleichert                       
> | syborg@stny.rr.com
> | http://vonbek.dhs.org/latest.jpg
> 
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