diff options
| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-01-24 13:51:15 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-01-24 13:51:15 +0530 |
| commit | 5d41dadf31bc8a2f9c34c40d52a442d3794e405c (patch) | |
| tree | 1033a8751da91bf20f3f870374fb15fe76aa797b | |
| parent | 0bad441c77fa4ff382dd3990542dcf52052b2121 (diff) | |
Adjust pointers to triplets in netgroup query data (BZ #16474)
The _nss_*_getnetgrent_r query populates the netgroup results in the
allocated buffer and then sets the result triplet to point to strings
in the buffer. This is a problem when the buffer is reallocated since
the pointers to the triplet strings are no longer valid. The pointers
need to be adjusted so that they now point to strings in the
reallocated buffer.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | nscd/netgroupcache.c | 12 |
3 files changed, 18 insertions, 2 deletions
@@ -1,3 +1,9 @@ +2013-01-24 Siddhesh Poyarekar <siddhesh@redhat.com> + + [BZ #16474] + * nscd/netgroupcache.c (addgetnetgrentX): Adjust triplet + string pointers after reallocation. + 2014-01-24 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/unix/sysv/linux/sh/sys/ucontext.h: Use __SH4__ and @@ -25,7 +25,7 @@ Version 2.19 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245, 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16384, 16385, 16386, 16387, 16390, - 16394, 16400, 16407, 16408, 16414, 16430, 16431, 16453. + 16394, 16400, 16407, 16408, 16414, 16430, 16431, 16453, 16474. * Slovenian translations for glibc messages have been contributed by the Translation Project's Slovenian team of translators. diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c index 58234b1492..924567c3f3 100644 --- a/nscd/netgroupcache.c +++ b/nscd/netgroupcache.c @@ -241,7 +241,17 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req, if (buflen - req->key_len - bufused < needed) { buflen += MAX (buflen, 2 * needed); - buffer = xrealloc (buffer, buflen); + char *newbuf = xrealloc (buffer, buflen); + /* Adjust the pointers in the new + buffer. */ + nhost = (nhost ? newbuf + (nhost - buffer) + : NULL); + nuser = (nuser ? newbuf + (nuser - buffer) + : NULL); + ndomain = (ndomain + ? newbuf + (ndomain - buffer) + : NULL); + buffer = newbuf; } nhost = memcpy (buffer + bufused, |