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Fix double-free in logfs

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iput() is needed *until* we'd done successful d_alloc_root()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-04-28 20:57:02 -04:00
parent d83c49f3e3
commit 265624495f
1 changed files with 7 additions and 7 deletions
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14
fs/logfs/super.c
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@ -333,27 +333,27 @@ static int logfs_get_sb_final(struct super_block *sb, struct vfsmount *mnt)
goto fail;
sb->s_root = d_alloc_root(rootdir);
if (!sb->s_root)
goto fail2;
if (!sb->s_root) {
iput(rootdir);
goto fail;
}
super->s_erase_page = alloc_pages(GFP_KERNEL, 0);
if (!super->s_erase_page)
goto fail2;
goto fail;
memset(page_address(super->s_erase_page), 0xFF, PAGE_SIZE);
/* FIXME: check for read-only mounts */
err = logfs_make_writeable(sb);
if (err)
goto fail3;
goto fail1;
log_super("LogFS: Finished mounting\n");
simple_set_mnt(mnt, sb);
return 0;
fail3:
fail1:
__free_page(super->s_erase_page);
fail2:
iput(rootdir);
fail:
iput(logfs_super(sb)->s_master_inode);
return -EIO;