From ee27836b579d3bf750d45cd7081d3433ea6fedd5 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Fri, 8 Nov 2019 12:45:11 +0100 Subject: [PATCH] ext4: Fix leak of quota reservations Commit 8fcc3a580651 ("ext4: rework reserved cluster accounting when invalidating pages") moved freeing of delayed allocation reservations from dirty page invalidation time to time when we evict corresponding status extent from extent status tree. For inodes which don't have any blocks allocated this may actually happen only in ext4_clear_blocks() which is after we've dropped references to quota structures from the inode. Thus reservation of quota leaked. Fix the problem by clearing quota information from the inode only after evicting extent status tree in ext4_clear_inode(). Reported-by: Konstantin Khlebnikov Fixes: 8fcc3a580651 ("ext4: rework reserved cluster accounting when invalidating pages") Signed-off-by: Jan Kara --- fs/ext4/ialloc.c | 5 ----- fs/ext4/super.c | 2 +- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 764ff4c56233..564e2ceb8417 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -265,13 +265,8 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) ext4_debug("freeing inode %lu\n", ino); trace_ext4_free_inode(inode); - /* - * Note: we must free any quota before locking the superblock, - * as writing the quota to disk may need the lock as well. - */ dquot_initialize(inode); dquot_free_inode(inode); - dquot_drop(inode); is_directory = S_ISDIR(inode->i_mode); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index dd654e53ba3d..9589f09a40f6 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1172,9 +1172,9 @@ void ext4_clear_inode(struct inode *inode) { invalidate_inode_buffers(inode); clear_inode(inode); - dquot_drop(inode); ext4_discard_preallocations(inode); ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); + dquot_drop(inode); if (EXT4_I(inode)->jinode) { jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), EXT4_I(inode)->jinode); -- 2.16.4