quota: check block number when reading the block in quota file

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The block number in the quota tree on disk should be smaller than the
v2_disk_dqinfo.dqi_blocks. If the quota file was corrupted, we may be
allocating an 'allocated' block and that would lead to a loop in a tree,
which will probably trigger oops later. This patch adds a check for the
block number in the quota tree to prevent such potential issue.

Link: https://lore.kernel.org/r/20211008093821.1001186-2-yi.zhang@huawei.com
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>

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Zhang Yi 2021-10-08 17:38:20 +08:00 • committed by Jan Kara

parent 64570fbc14

commit 9bf3d20331

1 changed files with 14 additions and 0 deletions

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fs/quota/quota_tree.c

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