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| author | alc <alc@FreeBSD.org> | 1999-05-30 01:12:19 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 1999-05-30 01:12:19 +0000 |
| commit | a20319a2aece106c114f5acaf91f641f42bdabec (patch) | |
| tree | d0e7d742e13c86d026b4b0bd266157653f8b558f /sys/vm/vm_object.c | |
| parent | 58ba6a68efa86520104001a99ce34ef2d3e62049 (diff) | |
| download | FreeBSD-src-a20319a2aece106c114f5acaf91f641f42bdabec.zip FreeBSD-src-a20319a2aece106c114f5acaf91f641f42bdabec.tar.gz | |
Addendum to 1.155. Verify the existence of the object before checking
its reference count.
Diffstat (limited to 'sys/vm/vm_object.c')
| -rw-r--r-- | sys/vm/vm_object.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index 0dccdf1..010ea28 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -61,7 +61,7 @@ * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. * - * $Id: vm_object.c,v 1.154 1999/05/16 05:07:34 alc Exp $ + * $Id: vm_object.c,v 1.155 1999/05/28 03:39:44 alc Exp $ */ /* @@ -871,7 +871,8 @@ vm_object_shadow(object, offset, length) * Don't create the new object if the old object isn't shared. */ - if (source->ref_count == 1 && + if (source != NULL && + source->ref_count == 1 && source->handle == NULL && (source->type == OBJT_DEFAULT || source->type == OBJT_SWAP)) |
