On Thu 12-02-15 12:36:49, Konstantin Khlebnikov wrote:
> Root level in quota tree must be already allocated otherwise this block
> could be used for something else.
Thanks. I've added the patch to my tree.
Honza
>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
> ---
> fs/quota/quota_tree.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
> index d65877f..58efb83 100644
> --- a/fs/quota/quota_tree.c
> +++ b/fs/quota/quota_tree.c
> @@ -349,6 +349,13 @@ static inline int dq_insert_tree(struct qtree_mem_dqinfo *info,
> struct dquot *dquot)
> {
> int tmp = QT_TREEOFF;
> +
> +#ifdef __QUOTA_QT_PARANOIA
> + if (info->dqi_blocks <= QT_TREEOFF) {
> + quota_error(dquot->dq_sb, "Quota tree root isn't allocated!");
> + return -EIO;
> + }
> +#endif
> return do_insert_tree(info, dquot, &tmp, 0);
> }
>
>
--
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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