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exfat: fix range validation error in alloc and free cluster 

There is check error in range condition that can never be entered
even with invalid input.
Replace incorrent checking code with already existing valid checker.

Signed-off-by: hyeongseok.kim <hyeongseok@gmail.com>
Acked-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
This commit is contained in:
hyeongseok.kim 2020-06-04 13:54:28 +09:00 committed by Namjae Jeon
parent 29bbb14bfc
commit a949824f01
1 changed files with 2 additions and 2 deletions
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4
fs/exfat/fatent.c
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@ -169,7 +169,7 @@ int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain)
return 0;
/* check cluster validation */
if (p_chain->dir < 2 && p_chain->dir >= sbi->num_clusters) {
if (!is_valid_cluster(sbi, p_chain->dir)) {
exfat_err(sb, "invalid start cluster (%u)", p_chain->dir);
return -EIO;
}
@ -346,7 +346,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
}
/* check cluster validation */
if (hint_clu < EXFAT_FIRST_CLUSTER && hint_clu >= sbi->num_clusters) {
if (!is_valid_cluster(sbi, hint_clu)) {
exfat_err(sb, "hint_cluster is invalid (%u)",
hint_clu);
hint_clu = EXFAT_FIRST_CLUSTER;