From: Dan Carpenter <dan.carpenter@oracle.com>
To: Namjae Jeon <namjae.jeon@samsung.com>,
linux-fsdevel@vger.kernel.org,
Sungjong Seo <sj1557.seo@samsung.com>
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org,
"Pali Rohár" <pali@kernel.org>,
"Tetsuhiro Kohada" <kohada.t2@gmail.com>,
"Wei Yongjun" <weiyongjun1@huawei.com>
Subject: [PATCH] exfat: call brelse() on error path
Date: Wed, 10 Jun 2020 12:59:34 +0300 [thread overview]
Message-ID: <20200610095934.GA35167@mwanda> (raw)
In-Reply-To: <208cba7b-e535-c8e0-5ac7-f15170117a7f@web.de>
If the second exfat_get_dentry() call fails then we need to release
"old_bh" before returning.
Reported-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
fs/exfat/namei.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 5b0f35329d63e..fda92c824ff11 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -1077,10 +1077,14 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
epold = exfat_get_dentry(sb, p_dir, oldentry + 1, &old_bh,
§or_old);
+ if (!epold)
+ return -EIO;
epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh,
§or_new);
- if (!epold || !epnew)
+ if (!epnew) {
+ brelse(old_bh);
return -EIO;
+ }
memcpy(epnew, epold, DENTRY_SIZE);
exfat_update_bh(sb, new_bh, sync);
--
2.26.2
next prev parent reply other threads:[~2020-06-10 10:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-08 15:07 [PATCH] exfat: Fix use after free in exfat_load_upcase_table() Markus Elfring
2020-06-08 15:52 ` Matthew Wilcox
2020-06-08 20:07 ` Markus Elfring
2020-06-09 9:10 ` [PATCH] " Greg KH
2020-06-10 9:27 ` exfat: Improving exception handling in two functions Markus Elfring
2020-06-10 9:59 ` Dan Carpenter [this message]
2020-06-10 12:14 ` Markus Elfring
2020-06-10 14:53 ` Greg KH
-- strict thread matches above, loose matches on Subject: below --
2020-06-10 12:07 [PATCH] exfat: call brelse() on error path Markus Elfring
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