This is a note to let you know that I've just added the patch titled
fs/ntfs3: Additional check in ntfs_file_release
to the 6.6-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:
fs-ntfs3-additional-check-in-ntfs_file_release.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3933e2d2f4c7f890cb64de35ff36be16beeae656
Author: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Date: Wed Sep 4 12:57:31 2024 +0300
fs/ntfs3: Additional check in ntfs_file_release
[ Upstream commit 031d6f608290c847ba6378322d0986d08d1a645a ]
Reported-by: syzbot+8c652f14a0fde76ff11d@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index f14d21b6c6d39..2ecd0303f9421 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -1173,7 +1173,14 @@ static int ntfs_file_release(struct inode *inode, struct file *file)
/* If we are last writer on the inode, drop the block reservation. */
if (sbi->options->prealloc &&
((file->f_mode & FMODE_WRITE) &&
- atomic_read(&inode->i_writecount) == 1)) {
+ atomic_read(&inode->i_writecount) == 1)
+ /*
+ * The only file when inode->i_fop = &ntfs_file_operations and
+ * init_rwsem(&ni->file.run_lock) is not called explicitly is MFT.
+ *
+ * Add additional check here.
+ */
+ && inode->i_ino != MFT_REC_MFT) {
ni_lock(ni);
down_write(&ni->file.run_lock);
