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Fix infinite loop in nscd when netgroup is empty (bz #16365)

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Currently, when a user looks up a netgroup that does not have any
members, nscd goes into an infinite loop trying to find members in the
group.  This is because it does not handle cases when getnetgrent
returns an NSS_STATUS_NOTFOUND (which is what it does on empty group).
Fixed to handle this in the same way as NSS_STATUS_RETURN, similar to
what getgrent does by itself.
This commit is contained in:
Siddhesh Poyarekar 2014-01-02 10:03:12 +05:30
parent ac49ddc495
commit d41242129b
3 changed files with 11 additions and 4 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2013-01-02 Siddhesh Poyarekar <siddhesh@redhat.com>
[BZ # 16365]
* nscd/netgroupcache.c (addgetnetgrentX): Break if status is
NSS_STATUS_NOTFOUND.
2014-01-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/fpu/libm-test-ulps: Regenerated.

2
NEWS
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@ -23,7 +23,7 @@ Version 2.19
16038, 16041, 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112,
16143, 16144, 16146, 16150, 16151, 16153, 16167, 16172, 16195, 16214,
16245, 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337,
16338, 16356, 16369, 16372, 16375, 16379.
16338, 16356, 16365, 16369, 16372, 16375, 16379.
* Slovenian translations for glibc messages have been contributed by the
Translation Project's Slovenian team of translators.

7
nscd/netgroupcache.c
View File

@ -180,9 +180,10 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
int e;
status = getfct.f (&data, buffer + buffilled,
buflen - buffilled, &e);
if (status == NSS_STATUS_RETURN)
/* This was the last one for this group. Look
at next group if available. */
if (status == NSS_STATUS_RETURN
|| status == NSS_STATUS_NOTFOUND)
/* This was either the last one for this group or the
group was empty. Look at next group if available. */
break;
if (status == NSS_STATUS_SUCCESS)
{