Jan Kara a898cb621a quota: Detect loops in quota tree
Syzbot has found that when it creates corrupted quota files where the
quota tree contains a loop, we will deadlock when tryling to insert a
dquot. Add loop detection into functions traversing the quota tree.

Signed-off-by: Jan Kara <jack@suse.cz>
2024-02-12 14:14:49 +01:00
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