Techwizz/kernel-fxtec-pro1x
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vfs: move MAY_EXEC check from __lookup_hash()

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The only caller of __lookup_hash() that needs the exec permission check on
parent is lookup_one_len().

All lookup_hash() callers already checked permission in LOOKUP_PARENT walk.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi 2012-03-26 12:54:21 +02:00 committed by Al Viro
parent 3637c05d88
commit cda309de25
1 changed files with 5 additions and 6 deletions
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11
fs/namei.c
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@ -1849,13 +1849,7 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
static struct dentry *__lookup_hash(struct qstr *name,
struct dentry *base, struct nameidata *nd)
{
struct inode *inode = base->d_inode;
struct dentry *dentry;
int err;
err = inode_permission(inode, MAY_EXEC);
if (err)
return ERR_PTR(err);
/*
* Don't bother with __d_lookup: callers are for creat as
@ -1922,6 +1916,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
{
struct qstr this;
unsigned int c;
int err;
WARN_ON_ONCE(!mutex_is_locked(&base->d_inode->i_mutex));
@ -1946,6 +1941,10 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
return ERR_PTR(err);
}
err = inode_permission(base->d_inode, MAY_EXEC);
if (err)
return ERR_PTR(err);
return __lookup_hash(&this, base, NULL);
}