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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2009-03-27 16:39:58 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-03-27 16:39:58 -0400
commit7a262f7c69163cd4811f2f838faef5c5b18439c9 (patch)
tree1d048ed0fa78d8d768c149cf414bd4325315f184 /fs/ext4/inode.c
parent56b19868aca856a7d7bf20c3a7a1030e4fd75b2b (diff)
ext4: Validate extent details only when read from the disk
Make sure we validate extent details only when read from the disk. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Thiemo Nagel <thiemo.nagel@ph.tum.de> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 25811507d2b..cd0399db0ef 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4345,6 +4345,16 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
(__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
}
+ if (ei->i_flags & EXT4_EXTENTS_FL) {
+ /* Validate extent which is part of inode */
+ ret = ext4_ext_check_inode(inode);
+ if (ret) {
+ brelse(bh);
+ goto bad_inode;
+ }
+
+ }
+
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ext4_file_inode_operations;
inode->i_fop = &ext4_file_operations;