linux-kernel - Re: [syzbot] [ext4?] KMSAN: uninit-value in ext4_inlinedir_to

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Date: Tue, 30 Apr 2024 13:34:02 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+eaba5abe296837a640c0@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [ext4?] KMSAN: uninit-value in ext4_inlinedir_to_tree

please test uv in ext4_inlinedir_to_tree

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 5e4f65c14dfb..3611952570a7 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1182,7 +1182,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 			 __u32 start_minor_hash, __u32 *next_hash)
 {
-	struct dx_hash_info hinfo;
+	struct dx_hash_info hinfo = {};
 	struct ext4_dir_entry_2 *de;
 	struct dx_frame frames[EXT4_HTREE_LEVEL], *frame;
 	struct inode *dir;