From: Edward Adam Davis eadavis@qq.com
[ Upstream commit 731ab1f9828800df871c5a7ab9ffe965317d3f15 ]
The length of name cannot exceed the space occupied by ea.
Reported-and-tested-by: syzbot+65e940cfb8f99a97aca7@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis eadavis@qq.com Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ntfs3/xattr.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c index 838a79157fb9..b50010494e6d 100644 --- a/fs/ntfs3/xattr.c +++ b/fs/ntfs3/xattr.c @@ -219,6 +219,9 @@ static ssize_t ntfs_list_ea(struct ntfs_inode *ni, char *buffer, if (!ea->name_len) break;
+ if (ea->name_len > ea_size) + break; + if (buffer) { /* Check if we can use field ea->name */ if (off + ea_size > size)