[PATCH 1/2] ext4: Make sure quota gets properly shutdown on error
From: Jan Kara <jack@suse.cz>
Date: 2021-10-07 15:53:43
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
When we hit an error when enabling quotas and setting inode flags, we do not properly shutdown quota subsystem despite returning error from Q_QUOTAON quotactl. This can lead to some odd situations like kernel using quota file while it is still writeable for userspace. Make sure we properly cleanup the quota subsystem in case of error. Signed-off-by: Jan Kara <jack@suse.cz> --- fs/ext4/super.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 88d5d274a868..fbe9cae63786 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -6267,10 +6267,7 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); err = dquot_quota_on(sb, type, format_id, path); - if (err) { - lockdep_set_quota_inode(path->dentry->d_inode, - I_DATA_SEM_NORMAL); - } else { + if (!err) { struct inode *inode = d_inode(path->dentry); handle_t *handle;
@@ -6290,7 +6287,12 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, ext4_journal_stop(handle); unlock_inode: inode_unlock(inode); + if (err) + dquot_quota_off(sb, type); } + if (err) + lockdep_set_quota_inode(path->dentry->d_inode, + I_DATA_SEM_NORMAL); return err; }
--
2.26.2