| From 0c336d6e33f4bedc443404c89f43c91c8bd9ee11 Mon Sep 17 00:00:00 2001 |
| From: Sungjong Seo <sj1557.seo@samsung.com> |
| Date: Tue, 19 Oct 2021 15:14:21 +0900 |
| Subject: exfat: fix incorrect loading of i_blocks for large files |
| |
| From: Sungjong Seo <sj1557.seo@samsung.com> |
| |
| commit 0c336d6e33f4bedc443404c89f43c91c8bd9ee11 upstream. |
| |
| 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> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| fs/exfat/inode.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/fs/exfat/inode.c |
| +++ b/fs/exfat/inode.c |
| @@ -604,7 +604,7 @@ static int exfat_fill_inode(struct inode |
| 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; |