On Mon 28-03-16 00:43:39, Ted Tso wrote:
> Hi Jan, this looks like a recent change that just landed in the quota
> tree. The crash is in dquot_get_next_id() because
> sb_dqopt(sb)->ops[0] is NULL.
>
> This looks like it was introduced in a fairly recent commit:
> be6257b251ce ("quota: Add support for ->get_nextdqblk() for VFS
> quota").
>
> Please see reproduction below. It can also be easily reproduced using
> "kvm-xfstests -c encrypt generic/244")
Thanks for report! Obviously we are missing a test whether quota is
actually enabled for the filesystem (the test generic/244 seems to be
somewhat buggy for VFS quota based filesystems). It was not written yet
when I was testing my changes and it never occured to me to run
Q_GENTEXTQUOTA against a filesystem with quotas disabled... I'll fix it up.
Honza
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
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