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exofs_mount(): fix leaks on failure exits

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... and don't abuse mount_nodev(), while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Al Viro 2018-11-09 22:26:42 -05:00
parent 651022382c
commit 26cb5a328c
1 changed files with 29 additions and 8 deletions
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37
fs/exofs/super.c
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@ -705,21 +705,18 @@ out:
/*
* Read the superblock from the OSD and fill in the fields
*/
static int exofs_fill_super(struct super_block *sb, void *data, int silent)
static int exofs_fill_super(struct super_block *sb,
struct exofs_mountopt *opts,
struct exofs_sb_info *sbi,
int silent)
{
struct inode *root;
struct exofs_mountopt *opts = data;
struct exofs_sb_info *sbi; /*extended info */
struct osd_dev *od; /* Master device */
struct exofs_fscb fscb; /*on-disk superblock info */
struct ore_comp comp;
unsigned table_count;
int ret;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
/* use mount options to fill superblock */
if (opts->is_osdname) {
struct osd_dev_info odi = {.systemid_len = 0};
@ -863,7 +860,9 @@ static struct dentry *exofs_mount(struct file_system_type *type,
int flags, const char *dev_name,
void *data)
{
struct super_block *s;
struct exofs_mountopt opts;
struct exofs_sb_info *sbi;
int ret;
ret = parse_options(data, &opts);
@ -872,9 +871,31 @@ static struct dentry *exofs_mount(struct file_system_type *type,
return ERR_PTR(ret);
}
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi) {
kfree(opts.dev_name);
return ERR_PTR(-ENOMEM);
}
s = sget(type, NULL, set_anon_super, flags, NULL);
if (IS_ERR(s)) {
kfree(opts.dev_name);
kfree(sbi);
return ERR_CAST(s);
}
if (!opts.dev_name)
opts.dev_name = dev_name;
return mount_nodev(type, flags, &opts, exofs_fill_super);
ret = exofs_fill_super(s, &opts, sbi, flags & SB_SILENT ? 1 : 0);
if (ret) {
deactivate_locked_super(s);
return ERR_PTR(ret);
}
s->s_flags |= SB_ACTIVE;
return dget(s->s_root);
}
/*