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commit c3ec475c5dd16499aa040908e11d382c3ded9692
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Author: Siddhesh Poyarekar <siddhesh@redhat.com>
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Date: Mon May 26 11:40:08 2014 +0530
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Use NSS_STATUS_TRYAGAIN to indicate insufficient buffer (BZ #16878)
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The netgroups nss modules in the glibc tree use NSS_STATUS_UNAVAIL
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(with errno as ERANGE) when the supplied buffer does not have
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sufficient space for the result. This is wrong, because the canonical
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way to indicate insufficient buffer is to set the errno to ERANGE and
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the status to NSS_STATUS_TRYAGAIN, as is used by all other modules.
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This fixes nscd behaviour when the nss_ldap module returns
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NSS_STATUS_TRYAGAIN to indicate that a netgroup entry is too long to
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fit into the supplied buffer.
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diff --git glibc-2.17-c758a686/nscd/netgroupcache.c glibc-2.17-c758a686/nscd/netgroupcache.c
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index b3d40e9..edab174 100644
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--- glibc-2.17-c758a686/nscd/netgroupcache.c
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+++ glibc-2.17-c758a686/nscd/netgroupcache.c
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@@ -197,11 +197,6 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
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int e;
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status = getfct.f (&data, buffer + buffilled,
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buflen - buffilled - req->key_len, &e);
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- if (status == NSS_STATUS_RETURN
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- || status == NSS_STATUS_NOTFOUND)
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- /* This was either the last one for this group or the
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- group was empty. Look at next group if available. */
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- break;
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if (status == NSS_STATUS_SUCCESS)
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{
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if (data.type == triple_val)
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@@ -320,11 +315,18 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
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}
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}
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}
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- else if (status == NSS_STATUS_UNAVAIL && e == ERANGE)
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+ else if (status == NSS_STATUS_TRYAGAIN && e == ERANGE)
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{
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buflen *= 2;
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buffer = xrealloc (buffer, buflen);
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}
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+ else if (status == NSS_STATUS_RETURN
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+ || status == NSS_STATUS_NOTFOUND
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+ || status == NSS_STATUS_UNAVAIL)
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+ /* This was either the last one for this group or the
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+ group was empty or the NSS module had an internal
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+ failure. Look at next group if available. */
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+ break;
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}
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enum nss_status (*endfct) (struct __netgrent *);
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diff --git glibc-2.17-c758a686/nss/nss_files/files-netgrp.c glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
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index 34eae4c..bc0b367 100644
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--- glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
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+++ glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
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@@ -252,7 +252,7 @@ _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
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if (cp - host > buflen)
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{
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*errnop = ERANGE;
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- status = NSS_STATUS_UNAVAIL;
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+ status = NSS_STATUS_TRYAGAIN;
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}
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else
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{
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