[patch] Fix for bz22161: ncsd: avoid dangling lock in netgroup cache timeout code

[Andreas Schwab]

On Sep 20 2017, DJ Delorie <dj@redhat.com> wrote:

> Patch for https://sourceware.org/bugzilla/show_bug.cgi?id=22161
>
>  "From the bz: in nscd/netgroupcache.c in addinnetgrX() we call
>   mempool_alloc(..., 1) which takes a lock on the database.  If we
>   exit via the "bump timeout" clause, the lock is not released."
>
> This patch adds an unlock if mempool_alloc actually took a lock, in
> the case where we return early because the timeout hasn't timed out.

What about the uses of mempool_alloc in the other *cache.c
implementations.  Are they ok?

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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