Re: [syzbot] [ntfs3?] KASAN: slab-out-of-bounds Read in ntfs_listxattr (2)

[Edward Adam Davis]

please test slab-out-of-bounds Read in ntfs_listxattr

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git aafe7ad77b91

diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index 4274b6f31cfa..3b97508a7bf2 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)