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| author | Yuezhang Mo <Yuezhang.Mo@sony.com> | 2022-07-28 10:01:26 +0800 |
|---|---|---|
| committer | Namjae Jeon <linkinjeon@kernel.org> | 2022-09-04 09:38:40 +0900 |
| commit | 2e9ceb6728f1dc2fa4b5d08f37d88cbc49a20a62 (patch) | |
| tree | 58caa767853b6eff8165198cd51ec63891940be0 /fs/exfat | |
| parent | 4c612826bec1441214816827979b62f84a097e91 (diff) | |
| download | linux-2e9ceb6728f1dc2fa4b5d08f37d88cbc49a20a62.tar.gz | |
exfat: fix overflow for large capacity partition
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>
Diffstat (limited to 'fs/exfat')
| -rw-r--r-- | fs/exfat/fatent.c | 3 |
1 files changed, 1 insertions, 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; |