linux-kernel - Re: [syzbot] [hfs?] KMSAN: uninit-value in hfs_find_1st_rec_by

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Message-ID: <tencent_E4CF8DA81272DDA55DD319044F9F8D88A507@qq.com>
Date: Thu, 21 Mar 2024 17:48:16 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+65f53dd6a0f7ad64c0cb@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in hfs_find_1st_rec_by_cnid

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;