| From df8823e136b04df1b3788c6c6586f0c2a27e04cb Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Tue, 23 Sep 2025 12:10:16 +0530 |
| Subject: ntfs3: Fix uninit buffer allocated by __getname() |
| |
| From: Sidharth Seela <sidharthseela@gmail.com> |
| |
| [ Upstream commit 9948dcb2f7b5a1bf8e8710eafaf6016e00be3ad6 ] |
| |
| 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> |
| Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| fs/ntfs3/inode.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c |
| index a967babea8a59..f27e25776b730 100644 |
| --- a/fs/ntfs3/inode.c |
| +++ b/fs/ntfs3/inode.c |
| @@ -1758,6 +1758,7 @@ 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); |
| -- |
| 2.51.0 |
| |
