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Kernel: use okendpt() to resolve stored endpoints

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This adds an integrity check at very little cost, and should stop
Coverity from flagging array overruns on the result.
This commit is contained in:
David van Moolenbroek 2012-08-15 08:50:30 +00:00
parent c0aa9bf6ed
commit 0b5c2a058c
5 changed files with 5 additions and 5 deletions
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2
kernel/arch/i386/do_iopenable.c
View file

@ -23,7 +23,7 @@ int do_iopenable(struct proc * caller, message * m_ptr)
#if 1 /* ENABLE_USERPRIV && ENABLE_USERIOPL */
if (m_ptr->IOP_ENDPT == SELF) {
proc_nr = _ENDPOINT_P(caller->p_endpoint);
okendpt(caller->p_endpoint, &proc_nr);
} else if(!isokendpt(m_ptr->IOP_ENDPT, &proc_nr))
return(EINVAL);
enable_iop(proc_addr(proc_nr));

2
kernel/arch/i386/do_sdevio.c
View file

@ -54,7 +54,7 @@ int do_sdevio(struct proc * caller, message *m_ptr)
* that initiated the device I/O. Kernel processes, of course, are denied.
*/
if (proc_nr_e == SELF)
proc_nr = _ENDPOINT_P(caller->p_endpoint);
okendpt(caller->p_endpoint, &proc_nr);
else
if(!isokendpt(proc_nr_e, &proc_nr))
return(EINVAL);

2
kernel/system/do_privctl.c
View file

@ -44,7 +44,7 @@ int do_privctl(struct proc * caller, message * m_ptr)
* forks.
*/
if (! (priv(caller)->s_flags & SYS_PROC)) return(EPERM);
if(m_ptr->CTL_ENDPT == SELF) proc_nr = _ENDPOINT_P(caller->p_endpoint);
if(m_ptr->CTL_ENDPT == SELF) okendpt(caller->p_endpoint, &proc_nr);
else if(!isokendpt(m_ptr->CTL_ENDPT, &proc_nr)) return(EINVAL);
rp = proc_addr(proc_nr);

2
kernel/system/do_schedule.c
View file

@ -14,7 +14,7 @@ int do_schedule(struct proc * caller, message * m_ptr)
if (!isokendpt(m_ptr->SCHEDULING_ENDPOINT, &proc_nr))
return EINVAL;
p = proc_addr(_ENDPOINT_P(m_ptr->SCHEDULING_ENDPOINT));
p = proc_addr(proc_nr);
/* Only this process' scheduler can schedule it */
if (caller != p->p_scheduler)

2
kernel/system/do_umap_remote.c
View file

@ -38,7 +38,7 @@ int do_umap_remote(struct proc * caller, message * m_ptr)
/* Verify process number. */
if (endpt == SELF)
proc_nr = _ENDPOINT_P(caller->p_endpoint);
okendpt(caller->p_endpoint, &proc_nr);
else
if (! isokendpt(endpt, &proc_nr))
return(EINVAL);