diff mbox series

[v2,6/7] exfat: fix overflow in sector and cluster conversion

Message ID PUZPR04MB63164078AA37CA1A2BCF159881E39@PUZPR04MB6316.apcprd04.prod.outlook.com (mailing list archive)
State New, archived
Headers show
Series exfat: code optimizations | expand

Commit Message

Yuezhang.Mo@sony.com Dec. 13, 2022, 2:37 a.m. UTC 
According to the exFAT specification, there are at most 2^32-11
clusters in a volume. so using 'int' is not enough for cluster
index, the return value type of exfat_sector_to_cluster() should
be 'unsigned int'.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
---
 fs/exfat/exfat_fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index a1e7feb22079..bc6d21d7c5ad 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -400,7 +400,7 @@  static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
 		sbi->data_start_sector;
 }
 
-static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
+static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
 		sector_t sec)
 {
 	return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +