From 4f0fffb993a09c3f592a2f79c79ff489e796960e Mon Sep 17 00:00:00 2001
From: phil <phil>
Date: Tue, 22 Jul 2003 16:29:19 +0000
Subject: [PATCH] - in ll_umount_begin, protect against NULL obd - fix debug
 subsystem in obdclass/obdo.c - remove zero-length buffer check from
 lustre_msg_buf; we already have   the minimum-size check, and zero length is
 common in the "no EA yet"   getattr case

---
 lustre/llite/llite_lib.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lustre/llite/llite_lib.c b/lustre/llite/llite_lib.c
index 821e6fe..e64c5da 100644
--- a/lustre/llite/llite_lib.c
+++ b/lustre/llite/llite_lib.c
@@ -922,11 +922,16 @@ void ll_umount_begin(struct super_block *sb)
         struct ll_sb_info *sbi = ll_s2sbi(sb);
         struct obd_device *obd;
         struct obd_ioctl_data ioc_data = { 0 };
-
         ENTRY;
         CDEBUG(D_VFSTRACE, "VFS Op:\n");
 
         obd = class_conn2obd(&sbi->ll_mdc_conn);
+        if (obd == NULL) {
+                CERROR("Invalid MDC connection handle "LPX64"\n",
+                       sbi->ll_mdc_conn.cookie);
+                EXIT;
+                return;
+        }
         obd->obd_no_recov = 1;
         obd_iocontrol(IOC_OSC_SET_ACTIVE, &sbi->ll_mdc_conn, sizeof ioc_data,
                       &ioc_data, NULL);
-- 
1.8.3.1