exfat: fix incorrect loading of i_blocks for large files

When calculating i_blocks, there was a mistake that was masked with a
32-bit variable. So i_blocks for files larger than 4 GiB had incorrect
values. Mask with a 64-bit variable instead of 32-bit one.

Fixes: 5f2aa075070c ("exfat: add inode operations")
Cc: stable@vger.kernel.org # v5.7+
Reported-by: Ganapathi Kamath <hgkamath@hotmail.com>
Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index ca37d43..1c7aa1e 100644 (file)
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -604,7 +604,7 @@ static int exfat_fill_inode(struct inode *inode, struct exfat_dir_entry *info)
        exfat_save_attr(inode, info->attr);
 
        inode->i_blocks = ((i_size_read(inode) + (sbi->cluster_size - 1)) &
-               ~(sbi->cluster_size - 1)) >> inode->i_blkbits;
+               ~((loff_t)sbi->cluster_size - 1)) >> inode->i_blkbits;
        inode->i_mtime = info->mtime;
        inode->i_ctime = info->mtime;
        ei->i_crtime = info->crtime;