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-rw-r--r--fs/ext3/inode.c13
-rw-r--r--fs/ext3/namei.c15
-rw-r--r--include/linux/ext3_fs.h9
3 files changed, 29 insertions, 8 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index f804d5e9d60..ab034d3053e 100644
--- a/fs/ext3/inode.c
+++ b/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/fs/ext3/namei.c b/fs/ext3/namei.c
index d9176dba369..2aa7101b27c 100644
--- a/fs/ext3/namei.c
+++ b/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/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 5607e6457a6..9f9cce7bd86 100644
--- a/include/linux/ext3_fs.h
+++ b/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