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don't check senda() buffer if size is 0.

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This commit is contained in:
Ben Gras 2008-12-21 03:46:42 +00:00
parent 203eb54a4c
commit 23a158b361
2 changed files with 14 additions and 8 deletions
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15
kernel/proc.c
View File

@ -315,8 +315,13 @@ long bit_map; /* notification event set or flags */
phys_bytes lin;
/* Map to linear address. */
if((lin = umap_local(caller_ptr, D, (vir_bytes) m_ptr, msg_size)) == 0)
if(msg_size > 0 &&
(lin = umap_local(caller_ptr, D, (vir_bytes) m_ptr, msg_size)) == 0) {
kprintf("umap_local failed for %s / %d on 0x%lx size %d\n",
caller_ptr->p_name, caller_ptr->p_endpoint,
m_ptr, msg_size);
return EFAULT;
}
/* Check if message pages in calling process are mapped.
* We don't have to check the recipient if this is a send,
@ -327,13 +332,12 @@ long bit_map; /* notification event set or flags */
* and those pages may not be shared between processes.
*/
if(vm_running &&
if(vm_running && msg_size > 0 &&
(r=vm_checkrange(caller_ptr, caller_ptr, lin, msg_size, 1, 0)) != OK) {
if(r != VMSUSPEND) {
kprintf("SYSTEM:sys_call:vm_checkrange: err %d\n", r);
return r;
}
minix_panic("vmsuspend", __LINE__);
/* We can't go ahead with this call. Caller is suspended
* and we have to save the state in its process struct.
@ -344,8 +348,8 @@ long bit_map; /* notification event set or flags */
caller_ptr->p_vmrequest.saved.sys_call.bit_map = bit_map;
caller_ptr->p_vmrequest.type = VMSTYPE_SYS_CALL;
kprintf("SYSTEM: %s:%d: suspending call 0x%lx on ipc buffer 0x%lx\n",
caller_ptr->p_name, caller_ptr->p_endpoint, call_nr, m_ptr);
kprintf("SYSTEM: %s:%d: suspending call 0x%lx on ipc buffer 0x%lx length 0x%lx\n",
caller_ptr->p_name, caller_ptr->p_endpoint, call_nr, m_ptr, msg_size);
/* vm_checkrange() will have suspended caller with VMREQUEST. */
return OK;
@ -482,7 +486,6 @@ PUBLIC void sys_call_restart(caller)
struct proc *caller;
{
int r;
minix_panic("sys_call_restart", NO_NUM);
kprintf("restarting sys_call code 0x%lx, "
"m_ptr 0x%lx, srcdst %d, bitmap 0x%lx, but not really\n",
caller->p_vmrequest.saved.sys_call.call_nr,

7
kernel/system.c
View File

@ -465,8 +465,11 @@ register struct proc *rc; /* slot of process to clean up */
RTS_LOCK_SET(rc, NO_ENDPOINT);
if (priv(rc)->s_flags & SYS_PROC)
{
if (priv(rc)->s_asynsize)
kprintf("clear_endpoint: clearing s_asynsize\n");
if (priv(rc)->s_asynsize) {
kprintf("clear_endpoint: clearing s_asynsize of %s / %d\n",
rc->p_name, rc->p_endpoint);
proc_stacktrace(rc);
}
priv(rc)->s_asynsize= 0;
}