---

yaml --- r: 32910 b: refs/heads/master c: 2ccb48e h: refs/heads/master v: v3
git-mirror · Jul 31, 2006 · 8d0df3c · 8d0df3c
1 parent 19b09ec
commit 8d0df3c
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Showing 4 changed files with 30 additions and 9 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f712c0c7e1796f92e45e4de144e247816d974b8f
+refs/heads/master: 2ccb48ebb4de139eef4fcefd5f2bb823cb0d81b9
diff --git a/trunk/fs/ext3/inode.c b/trunk/fs/ext3/inode.c
@@ -2402,14 +2402,15 @@ static ext3_fsblk_t ext3_get_inode_block(struct super_block *sb,
 	struct buffer_head *bh;
 	struct ext3_group_desc * gdp;
 
-
-	if ((ino != EXT3_ROOT_INO && ino != EXT3_JOURNAL_INO &&
-		ino != EXT3_RESIZE_INO && ino < EXT3_FIRST_INO(sb)) ||
-		ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) {
-		ext3_error(sb, "ext3_get_inode_block",
-			    "bad inode number: %lu", ino);
+	if (!ext3_valid_inum(sb, ino)) {
+		/*
+		 * This error is already checked for in namei.c unless we are
+		 * looking at an NFS filehandle, in which case no error
+		 * report is needed
+		 */
 		return 0;
 	}
+
 	block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
 	if (block_group >= EXT3_SB(sb)->s_groups_count) {
 		ext3_error(sb,"ext3_get_inode_block","group >= groups count");

diff --git a/trunk/fs/ext3/namei.c b/trunk/fs/ext3/namei.c
@@ -1000,7 +1000,12 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
 	if (bh) {
 		unsigned long ino = le32_to_cpu(de->inode);
 		brelse (bh);
-		inode = iget(dir->i_sb, ino);
+		if (!ext3_valid_inum(dir->i_sb, ino)) {
+			ext3_error(dir->i_sb, "ext3_lookup",
+				   "bad inode number: %lu", ino);
+			inode = NULL;
+		} else
+			inode = iget(dir->i_sb, ino);
 
 		if (!inode)
 			return ERR_PTR(-EACCES);
@@ -1028,7 +1033,13 @@ struct dentry *ext3_get_parent(struct dentry *child)
 		return ERR_PTR(-ENOENT);
 	ino = le32_to_cpu(de->inode);
 	brelse(bh);
-	inode = iget(child->d_inode->i_sb, ino);
+
+	if (!ext3_valid_inum(child->d_inode->i_sb, ino)) {
+		ext3_error(child->d_inode->i_sb, "ext3_get_parent",
+			   "bad inode number: %lu", ino);
+		inode = NULL;
+	} else
+		inode = iget(child->d_inode->i_sb, ino);
 
 	if (!inode)
 		return ERR_PTR(-EACCES);

diff --git a/trunk/include/linux/ext3_fs.h b/trunk/include/linux/ext3_fs.h
@@ -492,6 +492,15 @@ static inline struct ext3_inode_info *EXT3_I(struct inode *inode)
 {
 	return container_of(inode, struct ext3_inode_info, vfs_inode);
 }
+
+static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
+{
+	return ino == EXT3_ROOT_INO ||
+		ino == EXT3_JOURNAL_INO ||
+		ino == EXT3_RESIZE_INO ||
+		(ino >= EXT3_FIRST_INO(sb) &&
+		 ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count));
+}
 #else
 /* Assume that user mode programs are passing in an ext3fs superblock, not
  * a kernel struct super_block.  This will allow us to call the feature-test