Messages in this thread | | | Date | Mon, 26 Mar 2012 18:43:47 +0200 | From | Oleg Nesterov <> | Subject | Re: [rfc] fcntl: Add F_GETOWNER_UIDS option |
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On 03/26, Cyrill Gorcunov wrote: > > +#ifdef CONFIG_CHECKPOINT_RESTORE > +static int f_getowner_uids(struct file *filp, unsigned long arg) > +{ > + struct user_namespace *user_ns = current_user_ns(); > + const struct cred *cred = current_cred(); > + uid_t * __user dst = (void * __user)arg; > + uid_t src[2]; > + int err; > + > + read_lock(&filp->f_owner.lock); > + src[0] = filp->f_owner.uid; > + src[1] = filp->f_owner.euid; > + read_unlock(&filp->f_owner.lock); > + > + src[0] = user_ns_map_uid(user_ns, cred, src[0]); > + src[1] = user_ns_map_uid(user_ns, cred, src[1]);
Why?
In this case user_ns_map_uid() is "nop", it should always return the last arg, no?
Oleg.
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