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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-05-26 11:40:08 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-05-26 11:40:08 +0530 |
| commit | c3ec475c5dd16499aa040908e11d382c3ded9692 (patch) | |
| tree | 744f28e32954c9b92034ae79ed445b51e4f36e86 | |
| parent | aa2f176d6f75b86b91e544c2e494066ac8f88cbd (diff) | |
| download | glibc-c3ec475c5dd16499aa040908e11d382c3ded9692.tar.gz glibc-c3ec475c5dd16499aa040908e11d382c3ded9692.tar.xz glibc-c3ec475c5dd16499aa040908e11d382c3ded9692.zip | |
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-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 6 | ||||
| -rw-r--r-- | nscd/netgroupcache.c | 14 | ||||
| -rw-r--r-- | nss/nss_files/files-netgrp.c | 2 |
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 { |