Fwd: Bug#42343: libc6: gethostbyaddr() can hang indefinitely

[Ulrich Drepper]

Joel Klecker <jk@espy.org> writes:

> The resolver routines that glibc uses use select() internally. If the
> select() gets interrupted, it gets restarted, but the timeout value
> is re-initialized. If you have a timer in your program that uses
> signal(SIGALRM)/alarm() and it runs more often than the select timeout,
> gethostbyaddr() for example will hang forever if a DNS packet gets lost.

I've fixed this hopefully now for 2.1.2.

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