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Message-Id: <20230724012419.2317649-9-sashal@kernel.org>
Date: Sun, 23 Jul 2023 21:24:06 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Jan Kara <jack@...e.cz>, Ye Bin <yebin10@...wei.com>,
syzbot+e633c79ceaecbf479854@...kaller.appspotmail.com,
Sasha Levin <sashal@...nel.org>, jack@...e.com
Subject: [PATCH AUTOSEL 5.10 09/22] quota: Properly disable quotas when add_dquot_ref() fails
From: Jan Kara <jack@...e.cz>
[ 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@...wei.com>
Reported-by: syzbot+e633c79ceaecbf479854@...kaller.appspotmail.com
Signed-off-by: Jan Kara <jack@...e.cz>
Message-Id: <20230605140731.2427629-2-yebin10@...wei.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/quota/dquot.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index ad255f8ab5c55..135984a1a52f4 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:
--
2.39.2
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