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| author | Niu YaWei <niu@clusterfs.com> | 2005-04-16 15:25:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:25:47 -0700 |
| commit | e821d94d34af23a31a16ead78e8b685b750c8c3d (patch) | |
| tree | cb753d2d4e45c02c4c006383fa4d5d8dfba7a3c6 /fs/quota_v2.c | |
| parent | 31e7ad6ac919761f0486f7781b02ff3ab54b6ef1 (diff) | |
| download | linux-3.10-e821d94d34af23a31a16ead78e8b685b750c8c3d.tar.gz linux-3.10-e821d94d34af23a31a16ead78e8b685b750c8c3d.tar.bz2 linux-3.10-e821d94d34af23a31a16ead78e8b685b750c8c3d.zip | |
[PATCH] quota: possible bug in quota format v2 support
Don't put root block of quota tree to the free list (when quota file is
completely empty). That should not actually happen anyway (somebody should
get accounted for the filesystem root and so quota file should never be
empty) but better prevent it here than solve magical quota file
corruption.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/quota_v2.c')
| -rw-r--r-- | fs/quota_v2.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/quota_v2.c b/fs/quota_v2.c index 19bdb7b86ca..7afcbb1b937 100644 --- a/fs/quota_v2.c +++ b/fs/quota_v2.c @@ -503,7 +503,8 @@ static int remove_tree(struct dquot *dquot, uint *blk, int depth) int i; ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(0); for (i = 0; i < V2_DQBLKSIZE && !buf[i]; i++); /* Block got empty? */ - if (i == V2_DQBLKSIZE) { + /* Don't put the root block into the free block list */ + if (i == V2_DQBLKSIZE && *blk != V2_DQTREEOFF) { put_free_dqblk(sb, type, buf, *blk); *blk = 0; } |