From 240ceafed7a00af8571d56db67a6b8854e418106 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 29 Mar 2016 11:27:32 +0200
Subject: [PATCH] nss_db: Propagate ERANGE error if parse_line fails [BZ
 #19837]

Reproducer (needs to run as root):

perl -e \
  'print "large:x:999:" . join(",", map {"user$_"} (1 .. 135))."\n"' \
  >> /etc/group
cd /var/db
make
getent -s db group

After the fix, the last command should list the "large" group.

The magic number 135 has been chosen so that the line is shorter than
1024 bytes, but the pointers required to encode the member array will
cross the threshold, triggering the bug.

(cherry picked from commit a6033052d08027f745867e5e346852da1959226c)
---
 ChangeLog           | 6 ++++++
 nss/nss_db/db-XXX.c | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

#diff --git a/ChangeLog b/ChangeLog
#index bb8d618..84d847e 100644
#--- a/ChangeLog
#+++ b/ChangeLog
#@@ -1,3 +1,9 @@
#+2016-03-29  Florian Weimer  <fweimer@redhat.com>
#+
#+	[BZ #19837]
#+	* nss/nss_db/db-XXX.c (_nss_db_getENTNAME_r): Propagate ERANGE
#+	error if parse_line fails.
#+
# 2016-06-11  Florian Weimer  <fweimer@redhat.com>
# 
# 	[BZ #20237]
diff --git a/nss/nss_db/db-XXX.c b/nss/nss_db/db-XXX.c
index 70b58be..e13287a 100644
--- a/nss/nss_db/db-XXX.c
+++ b/nss/nss_db/db-XXX.c
@@ -294,8 +294,8 @@ CONCAT(_nss_db_get,ENTNAME_r) (struct STRUCTURE *result, char *buffer,
 	    }
 	  if (err < 0)
 	    {
-	      H_ERRNO_SET (HOST_NOT_FOUND);
-	      status = NSS_STATUS_NOTFOUND;
+	      H_ERRNO_SET (NETDB_INTERNAL);
+	      status = NSS_STATUS_TRYAGAIN;
 	      break;
 	    }
 
-- 
2.10.2