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[Bug nss/24695] nss_db: calling getpwent after endpwent crashes
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 31 Oct 2019 23:16:30 +0000
- Subject: [Bug nss/24695] nss_db: calling getpwent after endpwent crashes
- Auto-submitted: auto-generated
- References: <bug-24695-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=24695
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The release/2.29/master branch has been updated by DJ Delorie
<dj@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f1f24cdebafff0c372611801cc8dbe504c3ecfff
commit f1f24cdebafff0c372611801cc8dbe504c3ecfff
Author: DJ Delorie <dj@redhat.com>
Date: Fri Jun 28 18:30:00 2019 -0500
nss_db: fix endent wrt NULL mappings [BZ #24695] [BZ #24696]
nss_db allows for getpwent et al to be called without a set*ent,
but it only works once. After the last get*ent a set*ent is
required to restart, because the end*ent did not properly reset
the module. Resetting it to NULL allows for a proper restart.
If the database doesn't exist, however, end*ent erroniously called
munmap which set errno.
The test case runs "makedb" inside the testroot, so needs selinux
DSOs installed.
(cherry picked from commit 99135114ba23c3110b7e4e650fabdc5e639746b7)
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