From dcb5e3cd96b77d52bb65988e4c914636a6d4fdd9 Mon Sep 17 00:00:00 2001 From: Sidharth Seela Date: Tue, 23 Sep 2025 12:10:16 +0530 Subject: [PATCH] ntfs3: Fix uninit buffer allocated by __getname() [ 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 Signed-off-by: Konstantin Komarov Signed-off-by: Sasha Levin --- fs/ntfs3/inode.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index a967babea8a5..f27e25776b73 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);