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Fix a problem with child inheritance of sysv shm. Problem brought

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to my attention by Brad Lineberger <bil@mpgn.com> and Rob Miracle.
This commit is contained in:
John Dyson 1996-09-10 22:35:25 +00:00
parent 683cbdf4af
commit 0463028c37
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=18231
1 changed files with 4 additions and 0 deletions
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4
sys/kern/sysv_shm.c
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@ -54,6 +54,7 @@
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <vm/vm_pager.h>
#include <vm/vm_inherit.h>
#ifndef _SYS_SYSPROTO_H_
struct shmat_args;
@ -275,6 +276,9 @@ shmat(p, uap, retval)
if (rv != KERN_SUCCESS) {
return ENOMEM;
}
vm_map_inherit(&p->p_vmspace->vm_map,
attach_va, attach_va + size, VM_INHERIT_SHARE);
shmmap_s->va = attach_va;
shmmap_s->shmid = uap->shmid;
shmseg->shm_lpid = p->p_pid;