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authorYuezhang Mo <Yuezhang.Mo@sony.com>2022-12-13 09:40:32 +0800
committerNamjae Jeon <linkinjeon@kernel.org>2022-12-13 20:17:11 +0900
commit40306b4d1ba25970dafd53432e8daa5d591ebd99 (patch)
treeb150d91967727c957e09b02c9fbbf783ca7d459a /fs
parentf7cde96710a4362dca199458d3de04f631178453 (diff)
exfat: fix overflow in sector and cluster conversion
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> Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/exfat/exfat_fs.h2
1 files changed, 1 insertions, 1 deletions
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) +