[Bug nss/19837] nss_db: No retries for some long lines with a larger buffer

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19837

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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=28a87e027450b66faf1a431fc62779297c760e29

commit 28a87e027450b66faf1a431fc62779297c760e29
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Mar 29 11:27:32 2016 +0200

    nss_db: Propagate ERANGE error if parse_line fails [BZ #19837]

    Reproducer (needs to run as root):

    perl -e \
      'print "large:x:999:" . join(",", map {"user$_"} (1 .. 135))."\n"' \
      >> /etc/group
    cd /var/db
    make
    getent -s db group

    After the fix, the last command should list the "large" group.

    The magic number 135 has been chosen so that the line is shorter than
    1024 bytes, but the pointers required to encode the member array will
    cross the threshold, triggering the bug.

    (cherry picked from commit a6033052d08027f745867e5e346852da1959226c)

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog           |    6 ++++++
 nss/nss_db/db-XXX.c |    4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

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