Re: [syzbot] [ntfs3?] KMSAN: uninit-value in ntfs_read_bh

[Suraj Sonawane]

#syz test

From 9fb026cb33fba809fe23eb18f997140021f1bd84 Mon Sep 17 00:00:00 2001
From: Suraj Sonawane <surajsonawane0215@xxxxxxxxx>
Date: Tue, 5 Nov 2024 18:46:57 +0530
Subject: [PATCH] fs: ntfs3: fix uninit-value in ntfs_read_bh

syz test

Signed-off-by: Suraj Sonawane <surajsonawane0215@xxxxxxxxx>
---
 fs/ntfs3/fsntfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index 0fa636038..af5ba7378 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -1312,8 +1312,10 @@ int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
 {
 	int err = ntfs_read_run_nb(sbi, run, vbo, rhdr, bytes, nb);
 
-	if (err)
+	if (err) {
+		memset(rhdr, 0, sizeof(*rhdr));
 		return err;
+	}
 	return ntfs_fix_post_read(rhdr, nb->bytes, true);
 }
 
-- 
2.34.1