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Message-ID: <YnjY58EpRzaZP+YC@kili>
Date: Mon, 9 May 2022 12:03:35 +0300
From: Dan Carpenter <dan.carpenter@...cle.com>
To: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc: ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] fs/ntfs3: Don't clear upper bits accidentally in log_replay()
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>
---
Why am I getting new Smatch warnings in old ntfs3 code? It is a mystery.
fs/ntfs3/fslog.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index 915f42cf07bc..0da339fda2f4 100644
--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -5057,7 +5057,7 @@ int log_replay(struct ntfs_inode *ni, bool *initialized)
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),
--
2.35.1
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