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ext4: fix leak of quota reservations

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Commit 8fcc3a5806 ("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().

Link: https://lore.kernel.org/r/20191108115420.GI20863@quack2.suse.cz
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 8fcc3a5806 ("ext4: rework reserved cluster accounting when invalidating pages")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2019-11-08 12:45:11 +01:00 committed by Theodore Ts'o
parent 1e1a76ed9a
commit f4c2d372b8
2 changed files with 1 additions and 6 deletions
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5
fs/ext4/ialloc.c
View File

@ -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);

2
fs/ext4/super.c
View File

@ -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);