The patch titled
Subject: kasan: add test for vmalloc
has been removed from the -mm tree. Its filename was
kasan-add-test-for-vmalloc.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Daniel Axtens <dja@xxxxxxxxxx>
Subject: kasan: add test for vmalloc
Test kasan vmalloc support by adding a new test to the module.
Link: http://lkml.kernel.org/r/20191031093909.9228-3-dja@xxxxxxxxxx
Signed-off-by: Daniel Axtens <dja@xxxxxxxxxx>
Reviewed-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_kasan.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
--- a/lib/test_kasan.c~kasan-add-test-for-vmalloc
+++ a/lib/test_kasan.c
@@ -19,6 +19,7 @@
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/io.h>
+#include <linux/vmalloc.h>
#include <asm/page.h>
@@ -748,6 +749,30 @@ static noinline void __init kmalloc_doub
kzfree(ptr);
}
+#ifdef CONFIG_KASAN_VMALLOC
+static noinline void __init vmalloc_oob(void)
+{
+ void *area;
+
+ pr_info("vmalloc out-of-bounds\n");
+
+ /*
+ * We have to be careful not to hit the guard page.
+ * The MMU will catch that and crash us.
+ */
+ area = vmalloc(3000);
+ if (!area) {
+ pr_err("Allocation failed\n");
+ return;
+ }
+
+ ((volatile char *)area)[3100];
+ vfree(area);
+}
+#else
+static void __init vmalloc_oob(void) {}
+#endif
+
static int __init kmalloc_tests_init(void)
{
/*
@@ -793,6 +818,7 @@ static int __init kmalloc_tests_init(voi
kasan_strings();
kasan_bitops();
kmalloc_double_kzfree();
+ vmalloc_oob();
kasan_restore_multi_shot(multishot);
_
Patches currently in -mm which might be from dja@xxxxxxxxxx are
