This is a note to let you know that I've just added the patch titled
quota: Properly disable quotas when add_dquot_ref() fails
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
quota-properly-disable-quotas-when-add_dquot_ref-fai.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 39ba8c7aa3d9f723b546e8f604236ce6c9096e2c
Author: Jan Kara <jack@xxxxxxx>
Date: Mon Jun 5 22:07:30 2023 +0800
quota: Properly disable quotas when add_dquot_ref() fails
[ Upstream commit 6a4e3363792e30177cc3965697e34ddcea8b900b ]
When add_dquot_ref() fails (usually due to IO error or ENOMEM), we want
to disable quotas we are trying to enable. However dquot_disable() call
was passed just the flags we are enabling so in case flags ==
DQUOT_USAGE_ENABLED dquot_disable() call will just fail with EINVAL
instead of properly disabling quotas. Fix the problem by always passing
DQUOT_LIMITS_ENABLED | DQUOT_USAGE_ENABLED to dquot_disable() in this
case.
Reported-and-tested-by: Ye Bin <yebin10@xxxxxxxxxx>
Reported-by: syzbot+e633c79ceaecbf479854@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Jan Kara <jack@xxxxxxx>
Message-Id: <20230605140731.2427629-2-yebin10@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 1d652af48f0b1..44175f37bfeb5 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2415,7 +2415,8 @@ int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
error = add_dquot_ref(sb, type);
if (error)
- dquot_disable(sb, type, flags);
+ dquot_disable(sb, type,
+ DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
return error;
out_fmt:
