Re: [syzbot] [hfs?] KMSAN: uninit-value in hfsplus_cat_bin_cmp_key

[Edward Adam Davis]

bnode's record key length is smaller than 8?

#syz test

diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c
index 901e83d65d20..70deb143e518 100644
--- a/fs/hfsplus/bfind.c
+++ b/fs/hfsplus/bfind.c
@@ -116,7 +116,8 @@ int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd,
 		rec = (e + b) / 2;
 		len = hfs_brec_lenoff(bnode, rec, &off);
 		keylen = hfs_brec_keylen(bnode, rec);
-		if (keylen == 0) {
+		printk("keylen: %u, off: %u, key: %p, %s\n", keylen, off, fd->key, __func__);
+		if (keylen < 8) {
 			res = -EINVAL;
 			goto fail;
 		}