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authorSiddhesh Poyarekar <siddhesh@redhat.com>2014-05-26 11:40:08 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2014-05-26 11:40:08 +0530
commitc3ec475c5dd16499aa040908e11d382c3ded9692 (patch)
tree744f28e32954c9b92034ae79ed445b51e4f36e86
parentaa2f176d6f75b86b91e544c2e494066ac8f88cbd (diff)
downloadglibc-c3ec475c5dd16499aa040908e11d382c3ded9692.tar.gz
Use NSS_STATUS_TRYAGAIN to indicate insufficient buffer (BZ #16878)
The netgroups nss modules in the glibc tree use NSS_STATUS_UNAVAIL (with errno as ERANGE) when the supplied buffer does not have sufficient space for the result. This is wrong, because the canonical way to indicate insufficient buffer is to set the errno to ERANGE and the status to NSS_STATUS_TRYAGAIN, as is used by all other modules. This fixes nscd behaviour when the nss_ldap module returns NSS_STATUS_TRYAGAIN to indicate that a netgroup entry is too long to fit into the supplied buffer.
-rw-r--r--ChangeLog8
-rw-r--r--NEWS6
-rw-r--r--nscd/netgroupcache.c14
-rw-r--r--nss/nss_files/files-netgrp.c2
4 files changed, 20 insertions, 10 deletions
diff --git a/ChangeLog b/ChangeLog
index 299d4dedee..99d6223133 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2014-05-26 Siddhesh Poyarekar <siddhesh@redhat.com>
+
+ [BZ #16878]
+ * nscd/netgroupcache.c (addgetnetgrentX): Look for
+ NSS_STATUS_TRYAGAIN to indicate insufficient buffer space.
+ * nscd/nss_files/files-netgrp.c (_nss_netgroup_parseline): Use
+ NSS_STATUS_TRYAGAIN to indicate insufficient buffer space.
+
2014-05-25 Richard Henderson <rth@twiddle.net>
* sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
diff --git a/NEWS b/NEWS
index 85b140cc36..eaf0bc0331 100644
--- a/NEWS
+++ b/NEWS
@@ -16,9 +16,9 @@ Version 2.20
16670, 16674, 16677, 16680, 16683, 16689, 16695, 16701, 16706, 16707,
16712, 16713, 16714, 16731, 16739, 16740, 16743, 16754, 16758, 16759,
16760, 16770, 16786, 16789, 16791, 16799, 16800, 16815, 16823, 16824,
- 16831, 16838, 16849, 16854, 16876, 16877, 16885, 16888, 16890, 16912,
- 16915, 16916, 16917, 16922, 16927, 16928, 16932, 16943, 16958, 16966,
- 16967, 16965, 16977, 16978.
+ 16831, 16838, 16849, 16854, 16876, 16877, 16878, 16885, 16888, 16890,
+ 16912, 16915, 16916, 16917, 16922, 16927, 16928, 16932, 16943, 16958,
+ 16966, 16967, 16965, 16977, 16978.
* The minimum Linux kernel version that this version of the GNU C Library
can be used with is 2.6.32.
diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
index b3d40e9174..edab1744f4 100644
--- a/nscd/netgroupcache.c
+++ b/nscd/netgroupcache.c
@@ -197,11 +197,6 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
int e;
status = getfct.f (&data, buffer + buffilled,
buflen - buffilled - req->key_len, &e);
- 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)
{
if (data.type == triple_val)
@@ -320,11 +315,18 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
}
}
}
- else if (status == NSS_STATUS_UNAVAIL && e == ERANGE)
+ else if (status == NSS_STATUS_TRYAGAIN && e == ERANGE)
{
buflen *= 2;
buffer = xrealloc (buffer, buflen);
}
+ else if (status == NSS_STATUS_RETURN
+ || status == NSS_STATUS_NOTFOUND
+ || status == NSS_STATUS_UNAVAIL)
+ /* This was either the last one for this group or the
+ group was empty or the NSS module had an internal
+ failure. Look at next group if available. */
+ break;
}
enum nss_status (*endfct) (struct __netgrent *);
diff --git a/nss/nss_files/files-netgrp.c b/nss/nss_files/files-netgrp.c
index 34eae4c5be..bc0b367da8 100644
--- a/nss/nss_files/files-netgrp.c
+++ b/nss/nss_files/files-netgrp.c
@@ -252,7 +252,7 @@ _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
if (cp - host > buflen)
{
*errnop = ERANGE;
- status = NSS_STATUS_UNAVAIL;
+ status = NSS_STATUS_TRYAGAIN;
}
else
{