[PATCH 5.15 105/244] fs/ntfs3: Dont clear upper bits accidentally in log_replay()

Greg Kroah-Hartman
2022-08-23T10:06:33Z

From: Dan Carpenter <dan.carpenter@oracle.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@oracle.com>
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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),