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Code Issues Releases Wiki Activity

exfat: fix the newly allocated clusters are not freed in error handling 

In error handling 'free_cluster', before num_alloc clusters allocated,
p_chain->size will not updated and always 0, thus the newly allocated
clusters are not freed.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Yuezhang Mo 2023-02-10 13:33:44 +08:00 committed by Namjae Jeon
parent 3ce937cb8c
commit d5c514b6a0
1 changed files with 8 additions and 10 deletions
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18
fs/exfat/fatent.c
View File

@ -307,7 +307,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
struct exfat_chain *p_chain, bool sync_bmap)
{
int ret = -ENOSPC;
unsigned int num_clusters = 0, total_cnt;
unsigned int total_cnt;
unsigned int hint_clu, new_clu, last_clu = EXFAT_EOF_CLUSTER;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
@ -358,7 +358,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
if (new_clu != hint_clu &&
p_chain->flags == ALLOC_NO_FAT_CHAIN) {
if (exfat_chain_cont_cluster(sb, p_chain->dir,
num_clusters)) {
p_chain->size)) {
ret = -EIO;
goto free_cluster;
}
@ -371,8 +371,6 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
goto free_cluster;
}
num_clusters++;
/* update FAT table */
if (p_chain->flags == ALLOC_FAT_CHAIN) {
if (exfat_ent_set(sb, new_clu, EXFAT_EOF_CLUSTER)) {
@ -389,13 +387,14 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
goto free_cluster;
}
}
p_chain->size++;
last_clu = new_clu;
if (--num_alloc == 0) {
if (p_chain->size == num_alloc) {
sbi->clu_srch_ptr = hint_clu;
sbi->used_clusters += num_clusters;
sbi->used_clusters += num_alloc;
p_chain->size += num_clusters;
mutex_unlock(&sbi->bitmap_lock);
return 0;
}
@ -406,7 +405,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
if (p_chain->flags == ALLOC_NO_FAT_CHAIN) {
if (exfat_chain_cont_cluster(sb, p_chain->dir,
num_clusters)) {
p_chain->size)) {
ret = -EIO;
goto free_cluster;
}
@ -415,8 +414,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
}
}
free_cluster:
if (num_clusters)
__exfat_free_cluster(inode, p_chain);
__exfat_free_cluster(inode, p_chain);
unlock:
mutex_unlock(&sbi->bitmap_lock);
return ret;