| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.19 040/207] exfat: fix overflow for large capacity partition | Date | Mon, 26 Sep 2022 12:10:29 +0200 |
| |
From: Yuezhang Mo <Yuezhang.Mo@sony.com>
commit 2e9ceb6728f1dc2fa4b5d08f37d88cbc49a20a62 upstream.
Using int type for sector index, there will be overflow in a large capacity partition.
For example, if storage with sector size of 512 bytes and partition capacity is larger than 2TB, there will be overflow.
Fixes: 1b6138385499 ("exfat: reduce block requests when zeroing a cluster") Cc: stable@vger.kernel.org # v5.19+ Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com> Reviewed-by: Andy Wu <Andy.Wu@sony.com> Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com> Acked-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/fatent.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c index ee0b7cf51157..41ae4cce1f42 100644 --- a/fs/exfat/fatent.c +++ b/fs/exfat/fatent.c @@ -270,8 +270,7 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu) struct super_block *sb = dir->i_sb; struct exfat_sb_info *sbi = EXFAT_SB(sb); struct buffer_head *bh; - sector_t blknr, last_blknr; - int i; + sector_t blknr, last_blknr, i; blknr = exfat_cluster_to_sector(sbi, clu); last_blknr = blknr + sbi->sect_per_clus; -- 2.37.3
|