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authorTetsuhiro Kohada <kohada.t2@gmail.com>2020-06-24 03:54:54 +0300
committerNamjae Jeon <namjae.jeon@samsung.com>2020-08-12 02:31:12 +0300
commit8b0c471773819c8201dc0b0123e1580639ee1570 (patch)
tree1f3affcd9013c0834efd43ca97d439c97afa800e /fs/exfat
parent3db3c3fb840ed4a6c7666d1464959edd40fe54f1 (diff)
downloadlinux-8b0c471773819c8201dc0b0123e1580639ee1570.tar.xz
exfat: add error check when updating dir-entries
Add error check when synchronously updating dir-entries. Suggested-by: Sungjong Seo <sj1557.seo@samsung.com> Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Diffstat (limited to 'fs/exfat')
-rw-r--r--fs/exfat/dir.c3
-rw-r--r--fs/exfat/exfat_fs.h2
-rw-r--r--fs/exfat/file.c5
-rw-r--r--fs/exfat/inode.c9
4 files changed, 12 insertions, 7 deletions
diff --git a/fs/exfat/dir.c b/fs/exfat/dir.c
index 542f1a5ab56f..573659bfbc55 100644
--- a/fs/exfat/dir.c
+++ b/fs/exfat/dir.c
@@ -604,7 +604,7 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
es->modified = true;
}
-void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
+int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
{
int i, err = 0;
@@ -617,6 +617,7 @@ void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
else
brelse(es->bh[i]);
kfree(es);
+ return err;
}
static int exfat_walk_fat_chain(struct super_block *sb,
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index af0f526eece7..cb51d6e83199 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -460,7 +460,7 @@ struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
int num);
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned int type);
-void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
+int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
/* inode.c */
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index a6a063830edc..6bdabfd4b134 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -154,6 +154,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
struct timespec64 ts;
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es;
+ int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
@@ -188,7 +189,9 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
}
exfat_update_dir_chksum_with_entry_set(es);
- exfat_free_dentry_set(es, inode_needs_sync(inode));
+ err = exfat_free_dentry_set(es, inode_needs_sync(inode));
+ if (err)
+ return err;
}
/* cut off from the FAT chain */
diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index cf9ca6c4d046..f0160a7892a8 100644
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -77,8 +77,7 @@ static int __exfat_write_inode(struct inode *inode, int sync)
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
exfat_update_dir_chksum_with_entry_set(es);
- exfat_free_dentry_set(es, sync);
- return 0;
+ return exfat_free_dentry_set(es, sync);
}
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
@@ -222,6 +221,7 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
if (ei->dir.dir != DIR_DELETED && modified) {
struct exfat_dentry *ep;
struct exfat_entry_set_cache *es;
+ int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
@@ -240,8 +240,9 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
ep->dentry.stream.valid_size;
exfat_update_dir_chksum_with_entry_set(es);
- exfat_free_dentry_set(es, inode_needs_sync(inode));
-
+ err = exfat_free_dentry_set(es, inode_needs_sync(inode));
+ if (err)
+ return err;
} /* end of if != DIR_DELETED */
inode->i_blocks +=