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

[Szabolcs Nagy]

On 15/01/2019 15:54, Florian Weimer wrote:
> If /etc/aliases ends with a continuation line (a line that starts
> with whitespace) which does not have a training newline character,
> the file parser would crash due to a null pointer dereference.
> 
> 2019-01-15  Florian Weimer  <fweimer@redhat.com>
> 
> 	[BZ #24059]
> 	* nss/nss_files/files-alias.c (get_next_alias): Handle
> 	continuation line without newline at the end.
> 	* nss/tst-nss-files-alias-truncated.c: New file.
> 	* nss/Makefile [$(build-shared)] (tests): Add
> 	tst-nss-files-alias-truncated.
> 	(tst-nss-files-alias-truncated): Link with libnss_files.so.
> 	* support/namespace.h (struct support_chroot_configuration): Add
> 	aliases member.
> 	(struct support_chroot): Add path_aliases member.
> 	* support/support_chroot.c (support_chroot_create): Handle
> 	aliases.
> 	(support_chroot_free): Free path_aliases.

aarch64 buildbot consistently fails with

FAIL: nss/tst-nss-files-alias-truncated

error: tst-nss-files-alias-truncated.c:34: not true: e != NULL
error: support_isolate_in_subprocess.c:37: child process exited with status 256
error: 2 test failures

i'm not yet sure why (passes with ./testrun.sh)