Module Name: src
Committed By: chs
Date: Thu Jul 1 15:06:01 UTC 2021
Modified Files:
src/sys/uvm: uvm_map.c
Log Message:
in uvm_mapent_forkzero(), if the old entry was an object mapping,
appease a debug check by setting the new entry offset to zero along with
setting the new entry object pointer to NULL.
Reported-by: syzbot+de8e4b223a3838c73...@syzkaller.appspotmail.com
Reported-by: syzbot+efaea991addfdcc5a...@syzkaller.appspotmail.com
Reported-by: syzbot+15d1e19dff9209c2e...@syzkaller.appspotmail.com
To generate a diff of this commit:
cvs rdiff -u -r1.389 -r1.390 src/sys/uvm/uvm_map.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/uvm/uvm_map.c
diff -u src/sys/uvm/uvm_map.c:1.389 src/sys/uvm/uvm_map.c:1.390
--- src/sys/uvm/uvm_map.c:1.389 Sun Jun 20 07:11:38 2021
+++ src/sys/uvm/uvm_map.c Thu Jul 1 15:06:01 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: uvm_map.c,v 1.389 2021/06/20 07:11:38 mrg Exp $ */
+/* $NetBSD: uvm_map.c,v 1.390 2021/07/01 15:06:01 chs Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.389 2021/06/20 07:11:38 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.390 2021/07/01 15:06:01 chs Exp $");
#include "opt_ddb.h"
#include "opt_pax.h"
@@ -4451,6 +4451,7 @@ uvm_mapent_forkzero(struct vm_map *new_m
new_entry->object.uvm_obj->pgops->pgo_detach(
new_entry->object.uvm_obj);
new_entry->object.uvm_obj = NULL;
+ new_entry->offset = 0;
new_entry->etype &= ~UVM_ET_OBJ;
}
}
