mirror of https://gitee.com/openkylin/linux.git
ext4: add verifier check for symlink with append/immutable flags
The Linux VFS does not allow a way to set append/immuttable attributes to symlinks, this is just not possible. If this is detected inform the user as the filesystem must be corrupted. Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
parent
71fe989961
commit
6390d33bf5
|
@ -4965,6 +4965,13 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
|
||||||
inode->i_op = &ext4_dir_inode_operations;
|
inode->i_op = &ext4_dir_inode_operations;
|
||||||
inode->i_fop = &ext4_dir_operations;
|
inode->i_fop = &ext4_dir_operations;
|
||||||
} else if (S_ISLNK(inode->i_mode)) {
|
} else if (S_ISLNK(inode->i_mode)) {
|
||||||
|
/* VFS does not allow setting these so must be corruption */
|
||||||
|
if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) {
|
||||||
|
EXT4_ERROR_INODE(inode,
|
||||||
|
"immutable or append flags not allowed on symlinks");
|
||||||
|
ret = -EFSCORRUPTED;
|
||||||
|
goto bad_inode;
|
||||||
|
}
|
||||||
if (ext4_encrypted_inode(inode)) {
|
if (ext4_encrypted_inode(inode)) {
|
||||||
inode->i_op = &ext4_encrypted_symlink_inode_operations;
|
inode->i_op = &ext4_encrypted_symlink_inode_operations;
|
||||||
ext4_set_aops(inode);
|
ext4_set_aops(inode);
|
||||||
|
|
Loading…
Reference in New Issue