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logfs: initialize superblock entries earlier 

In particular, s_freeing_list needs to be initialized early, since it is
used on some of the error paths when mounts fail.  The mapping inode,
for example, would be initialized and then free'd on an error path
before s_freeing_list was initialized, but the inode drop operation
needs the s_freeing_list to be set up.

Normally you'd never see this, because not only is logfs fairly rare,
but a successful mount will never have any issues.

Reported-by: werner <w.landgraf@ru.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2011-05-03 16:10:25 -07:00
parent 609cfda586
commit cce2c56e76
1 changed files with 4 additions and 4 deletions
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8
fs/logfs/super.c
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@ -480,10 +480,6 @@ static int logfs_read_sb(struct super_block *sb, int read_only)
!read_only)
return -EIO;
mutex_init(&super->s_dirop_mutex);
mutex_init(&super->s_object_alias_mutex);
INIT_LIST_HEAD(&super->s_freeing_list);
ret = logfs_init_rw(sb);
if (ret)
return ret;
@ -601,6 +597,10 @@ static struct dentry *logfs_mount(struct file_system_type *type, int flags,
if (!super)
return ERR_PTR(-ENOMEM);
mutex_init(&super->s_dirop_mutex);
mutex_init(&super->s_object_alias_mutex);
INIT_LIST_HEAD(&super->s_freeing_list);
if (!devname)
err = logfs_get_sb_bdev(super, type, devname);
else if (strncmp(devname, "mtd", 3))