From: anserper <anserper>
Date: Mon, 11 May 2009 19:14:51 +0000 (+0000)
Subject: b=19115
X-Git-Tag: v1_8_2_01~1^2~459
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=e547e2df49bd80f5023b6cc8d0e42f4cab62bfae;p=fs%2Flustre-release.git

b=19115
i=Andreas Dilger
i=Nathan Rutman

additional error-checking in lov_setstripe
---

diff --git a/lustre/lov/lov_pack.c b/lustre/lov/lov_pack.c
index fffd848..d5c9996 100644
--- a/lustre/lov/lov_pack.c
+++ b/lustre/lov/lov_pack.c
@@ -424,19 +424,27 @@ int lov_setstripe(struct obd_export *exp, struct lov_stripe_md **lsmp,
         rc = copy_from_user(&lumv3, lump, sizeof(struct lov_user_md_v1));
         if (rc)
                 RETURN(-EFAULT);
-        if ((lumv1->lmm_magic == LOV_USER_MAGIC_V3) ||
-            (lumv1->lmm_magic == LOV_USER_MAGIC_V3_SWABBED)) {
+
+        switch (lumv1->lmm_magic) {
+        case LOV_USER_MAGIC_V3_SWABBED:
                 rc = copy_from_user(&lumv3, lump, sizeof(lumv3));
                 if (rc)
-                        RETURN(-EFAULT);
-        }
-
-        if ((lumv1->lmm_magic == LOV_USER_MAGIC_V1_SWABBED) ||
-            (lumv1->lmm_magic == LOV_USER_MAGIC_V3_SWABBED)) {
+                        break;
+                /* fall through to swab */
+        case LOV_USER_MAGIC_V1_SWABBED:
                 rc = lustre_swab_lov_user_md(lumv1);
-                if (rc)
-                        RETURN(rc);
+                break;
+        case LOV_USER_MAGIC_V3:
+                rc = copy_from_user(&lumv3, lump, sizeof(lumv3));
+                /* fall through */
+        case LOV_USER_MAGIC_V1:
+                break;
+        default:
+                CERROR("bad lsm magic %08x\n", lumv1->lmm_magic);
+                RETURN(-EINVAL);
         }
+        if (rc)
+                RETURN(rc);
 
         /* in the rest of the tests, as *lumv1 and lumv3 have the same
          * fields, we use lumv1 to avoid code duplication */