Module Name: src
Committed By: maxv
Date: Mon Feb 4 15:13:54 UTC 2019
Modified Files:
src/sys/kern: subr_kmem.c
Log Message:
Clobber the size when freeing a buffer. This way, if the same buffer gets
freed twice, the second size check will fire.
To generate a diff of this commit:
cvs rdiff -u -r1.72 -r1.73 src/sys/kern/subr_kmem.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/kern/subr_kmem.c
diff -u src/sys/kern/subr_kmem.c:1.72 src/sys/kern/subr_kmem.c:1.73
--- src/sys/kern/subr_kmem.c:1.72 Sun Dec 23 12:15:01 2018
+++ src/sys/kern/subr_kmem.c Mon Feb 4 15:13:54 2019
@@ -1,4 +1,4 @@
-/* $NetBSD: subr_kmem.c,v 1.72 2018/12/23 12:15:01 maxv Exp $ */
+/* $NetBSD: subr_kmem.c,v 1.73 2019/02/04 15:13:54 maxv Exp $ */
/*-
* Copyright (c) 2009-2015 The NetBSD Foundation, Inc.
@@ -92,7 +92,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_kmem.c,v 1.72 2018/12/23 12:15:01 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_kmem.c,v 1.73 2019/02/04 15:13:54 maxv Exp $");
#ifdef _KERNEL_OPT
#include "opt_kmem.h"
@@ -549,6 +549,8 @@ kmem_size_check(void *p, size_t sz)
panic("kmem_free(%p, %zu) != allocated size %zu",
(const uint8_t *)p + SIZE_SIZE, sz, hsz);
}
+
+ hd->size = -1;
}
#endif /* defined(KMEM_SIZE) */
