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From: Sidharth Seela <sidharthseela@gmail.com>
To: almaz.alexandrovich@paragon-software.com
Cc: ntfs3@lists.linux.dev, linux-kernel@vger.kernel.org,
	syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com,
	sidharthseela@gmail.com
Subject: [PATCH v1] ntfs3: Fix uninit buffer allocated by __getname()
Date: Tue, 23 Sep 2025 12:10:16 +0530	[thread overview]
Message-ID: <20250923064015.178554-2-sidharthseela@gmail.com> (raw)

Fix uninit errors caused after buffer allocation given to 'de'; by
initializing the buffer with zeroes. The fix was found by using KMSAN.

Reported-by: syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com
Fixes: 78ab59fee07f2 ("fs/ntfs3: Rework file operations")
Signed-off-by: Sidharth Seela <sidharthseela@gmail.com>

--

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 37cbbee7fa58..6b14c13bda68 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -1716,6 +1716,7 @@ int ntfs_link_inode(struct inode *inode, struct dentry *dentry)
 	de = __getname();
 	if (!de)
 		return -ENOMEM;
+	memset(de, 0, PATH_MAX);
 
 	/* Mark rw ntfs as dirty. It will be cleared at umount. */
 	ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
-- 
2.47.3


             reply	other threads:[~2025-09-23  6:40 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-23  6:40 Sidharth Seela [this message]
2025-11-20  8:47 ` [PATCH v1] ntfs3: Fix uninit buffer allocated by __getname() Konstantin Komarov

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