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authorYuezhang Mo <Yuezhang.Mo@sony.com>2022-07-28 05:01:26 +0300
committerNamjae Jeon <linkinjeon@kernel.org>2022-09-04 03:38:40 +0300
commit2e9ceb6728f1dc2fa4b5d08f37d88cbc49a20a62 (patch)
tree58caa767853b6eff8165198cd51ec63891940be0 /fs/exfat
parent4c612826bec1441214816827979b62f84a097e91 (diff)
downloadlinux-2e9ceb6728f1dc2fa4b5d08f37d88cbc49a20a62.tar.xz
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.c3
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;