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 6.1-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-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 75f4913c810721cf821d01389e68f696565ca164
Author: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Date: Mon Nov 18 10:26:50 2024 +0800
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: Bin Lan <bin.lan.cn@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index aedd4f5f459e6..70b38465aee36 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -1214,8 +1214,16 @@ static int ntfs_file_release(struct inode *inode, struct file *file)
int err = 0;
/* 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)) {
+ if (sbi->options->prealloc &&
+ ((file->f_mode & FMODE_WRITE) &&
+ 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);
