linux-kernel - [PATCH 5.19 162/365] fs/ntfs3: Dont clear upper bits accidentally in log

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Message-Id: <20220823080124.991671071@linuxfoundation.org>
Date:   Tue, 23 Aug 2022 10:01:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Namjae Jeon <linkinjeon@...nel.org>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Subject: [PATCH 5.19 162/365] fs/ntfs3: Dont clear upper bits accidentally in log_replay()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 926034353d3c67db1ffeab47dcb7f6bdac02a263 upstream.

The "vcn" variable is a 64 bit.  The "log->clst_per_page" variable is a
u32.  This means that the mask accidentally clears out the high 32 bits
when it was only supposed to clear some low bits.  Fix this by adding a
cast to u64.

Fixes: b46acd6a6a62 ("fs/ntfs3: Add NTFS journal")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Namjae Jeon <linkinjeon@...nel.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ntfs3/fslog.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -5057,7 +5057,7 @@ undo_action_next:
 		goto add_allocated_vcns;
 
 	vcn = le64_to_cpu(lrh->target_vcn);
-	vcn &= ~(log->clst_per_page - 1);
+	vcn &= ~(u64)(log->clst_per_page - 1);
 
 add_allocated_vcns:
 	for (i = 0, vcn = le64_to_cpu(lrh->target_vcn),