Re: [syzbot] [hfs?] KMSAN: uninit-value in hfs_find_1st_rec_by_cnid

From: Edward Adam Davis
Date: Thu Mar 21 2024 - 05:49:47 EST


please test uninit-value in hfs_find_1st_rec_by_cnid

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c
index ca2ba8c9f82e..b939dc879dac 100644
--- a/fs/hfsplus/bfind.c
+++ b/fs/hfsplus/bfind.c
@@ -18,7 +18,7 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd)

fd->tree = tree;
fd->bnode = NULL;
- ptr = kmalloc(tree->max_key_len * 2 + 4, GFP_KERNEL);
+ ptr = kzalloc(tree->max_key_len * 2 + 4, GFP_KERNEL);
if (!ptr)
return -ENOMEM;
fd->search_key = ptr;