[Bug nss/24059] nss_files: get_next_alias calls fgets_unlocked without checking for NULL.

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=24059

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2bac7daa58da1a313bd452369b0508b31e146637

commit 2bac7daa58da1a313bd452369b0508b31e146637
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu Jan 31 18:49:58 2019 +0100

    nss_files: Fix /etc/aliases null pointer dereference [BZ #24059]

    If /etc/aliases ends with a continuation line (a line that starts
    with whitespace) which does not have a trailing newline character,
    the file parser would crash due to a null pointer dereference.

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

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

Summary of changes:
 ChangeLog                           |   16 ++++++++
 nss/Makefile                        |    2 +
 nss/nss_files/files-alias.c         |   10 +++++
 nss/tst-nss-files-alias-truncated.c |   66 +++++++++++++++++++++++++++++++++++
 support/namespace.h                 |    2 +
 support/support_chroot.c            |    2 +
 6 files changed, 98 insertions(+), 0 deletions(-)
 create mode 100644 nss/tst-nss-files-alias-truncated.c

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