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Do not vdrop() the tmpfs vnode until it is unlocked. The hold

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reference might be the last, and then vdrop() would free the vnode.

Reported and tested by:	bdrewery
MFC after:	1 week
This commit is contained in:
kib 2014-03-12 15:13:57 +00:00
parent d734bed796
commit e4111a6b71
1 changed files with 2 additions and 1 deletions
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3
sys/vm/vm_object.c
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@ -536,17 +536,18 @@ vm_object_deallocate(vm_object_t object)
vhold(vp);
VM_OBJECT_WUNLOCK(object);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
vdrop(vp);
VM_OBJECT_WLOCK(object);
if (object->type == OBJT_DEAD ||
object->ref_count != 1) {
VM_OBJECT_WUNLOCK(object);
VOP_UNLOCK(vp, 0);
vdrop(vp);
return;
}
if ((object->flags & OBJ_TMPFS) != 0)
VOP_UNSET_TEXT(vp);
VOP_UNLOCK(vp, 0);
vdrop(vp);
}
if (object->shadow_count == 0 &&
object->handle == NULL &&