linux-kernel - [PATCH AUTOSEL 6.6 04/17] fs/ntfs3: Stale inode instead of bad

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Message-ID: <20241014035815.2247153-4-sashal@kernel.org>
Date: Sun, 13 Oct 2024 23:57:54 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
	Sasha Levin <sashal@...nel.org>,
	ntfs3@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.6 04/17] fs/ntfs3: Stale inode instead of bad

From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>

[ Upstream commit 1fd21919de6de245b63066b8ee3cfba92e36f0e9 ]

Fixed the logic of processing inode with wrong sequence number.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/ntfs3/inode.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 1545262995da2..20988ef3dc2ec 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -532,11 +532,15 @@ struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
 	if (inode->i_state & I_NEW)
 		inode = ntfs_read_mft(inode, name, ref);
 	else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) {
-		/* Inode overlaps? */
-		_ntfs_bad_inode(inode);
+		/*
+		 * Sequence number is not expected.
+		 * Looks like inode was reused but caller uses the old reference
+		 */
+		iput(inode);
+		inode = ERR_PTR(-ESTALE);
 	}
 
-	if (IS_ERR(inode) && name)
+	if (IS_ERR(inode))
 		ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR);
 
 	return inode;
-- 
2.43.0