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Re: (ITS#8299) LMDB mdb_del data loss when used in a cursor (new repro)
- To: openldap-its@OpenLDAP.org
- Subject: Re: (ITS#8299) LMDB mdb_del data loss when used in a cursor (new repro)
- From: firstname.lastname@example.org
- Date: Wed, 04 Nov 2015 17:06:48 +0000
- Auto-submitted: auto-generated (OpenLDAP-ITS)
> Full_Name: Michael Alyn Miller
> Version: Git head
> OS: Windows 8.1 x64, NixOS 14.12 x64
> URL: ftp://ftp.openldap.org/incoming/michaelalynmiller-151103.c
> Submission from: (NULL) (220.127.116.11)
> I have a new repro of an ITS#8264-like situation, but with different input data
> and with slightly different results. Note that ITS#8264 was fixed with the
> dataset provided in that bug; this is a different dataset and produces different
> The referenced test runs twice: once with mdb_cursor_del and once with mdb_del.
> Just like before, mdb_cursor_del performs correctly whereas mdb_del corrupts the
> database. In this case, mdb_del incorrectly removes one extra key (a key
> prefixed with 04000000000000003a...), and incorrectly leaves 21 keys in place
> that should have been deleted (those keys begin with 05000000000000003a...).
> This last item is the primary difference between these two bugs.
> Unlike ITS#8264, you do not need to remove the database in between test runs in
> order to repro this issue, although the results are still incorrect and will
> eventually cause a bus error.
Thanks again for the excellent bug reports. Fixed now in git.
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/