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Code Issues Releases Activity

Aquire vm mutex when releasing sysv shm segments.

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Obtained from: Dima Dorfman <dima@unixfreak.org>
This commit is contained in:
Alfred Perlstein 2001-05-20 20:37:47 +00:00
parent 387acdd9ff
commit 67d1f21cbe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=76908
1 changed files with 4 additions and 0 deletions
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4
sys/kern/sysv_shm.c
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@ -182,7 +182,9 @@ shm_deallocate_segment(shmseg)
size_t size;
shm_handle = shmseg->shm_internal;
mtx_lock(&vm_mtx);
vm_object_deallocate(shm_handle->shm_object);
mtx_unlock(&vm_mtx);
free((caddr_t)shm_handle, M_SHM);
shmseg->shm_internal = NULL;
size = round_page(shmseg->shm_segsz);
@ -203,7 +205,9 @@ shm_delete_mapping(p, shmmap_s)
segnum = IPCID_TO_IX(shmmap_s->shmid);
shmseg = &shmsegs[segnum];
size = round_page(shmseg->shm_segsz);
mtx_lock(&vm_mtx);
result = vm_map_remove(&p->p_vmspace->vm_map, shmmap_s->va, shmmap_s->va + size);
mtx_unlock(&vm_mtx);
if (result != KERN_SUCCESS)
return EINVAL;
shmmap_s->shmid = -1;