From beb37b85b0b727e68e16a39a1e5a2140f87fa201 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Thu, 26 Aug 2010 00:54:39 +0200 Subject: ext3: Fix lost extented attributes for inode with ino == 11 If a filesystem has inode size > 128 and someone deletes lost+found and reuses inode 11 for some other file, extented attributes set for this inode before umount will get lost after remounting the filesystem. This is because extended attributes will get stored in an inode but ext3_iget will ignore them due to workaround of a bug in an old mkfs. Fix the problem by initializing i_extra_isize to 0 for freshly allocated inodes where mkfs workaround in ext3_iget applies. This way these inodes will always store extended attributes in a special block and no problems occur. The bug was spotted and a reproduction test provided by: Masayoshi MIZUMA Reviewed-by: Andreas Dilger Signed-off-by: Jan Kara --- fs/ext3/ialloc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'fs/ext3') diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c index 4ab72db3559e..9724aef22460 100644 --- a/fs/ext3/ialloc.c +++ b/fs/ext3/ialloc.c @@ -570,9 +570,14 @@ got: ei->i_state_flags = 0; ext3_set_inode_state(inode, EXT3_STATE_NEW); - ei->i_extra_isize = - (EXT3_INODE_SIZE(inode->i_sb) > EXT3_GOOD_OLD_INODE_SIZE) ? - sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE : 0; + /* See comment in ext3_iget for explanation */ + if (ino >= EXT3_FIRST_INO(sb) + 1 && + EXT3_INODE_SIZE(sb) > EXT3_GOOD_OLD_INODE_SIZE) { + ei->i_extra_isize = + sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE; + } else { + ei->i_extra_isize = 0; + } ret = inode; dquot_initialize(inode); -- cgit v1.2.3