From: paulmck@kernel.org
To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
kernel-team@fb.com, mingo@kernel.org
Cc: elver@google.com, andreyknvl@google.com, glider@google.com,
dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com,
"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH kcsan 1/3] kcsan: selftest: Ensure that address is at least PAGE_SIZE
Date: Thu, 5 Nov 2020 14:03:22 -0800 [thread overview]
Message-ID: <20201105220324.15808-1-paulmck@kernel.org> (raw)
In-Reply-To: <20201105220302.GA15733@paulmck-ThinkPad-P72>
From: Marco Elver <elver@google.com>
In preparation of supporting only addresses not within the NULL page,
change the selftest to never use addresses that are less than PAGE_SIZE.
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/kcsan/selftest.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c
index d98bc20..9014a3a 100644
--- a/kernel/kcsan/selftest.c
+++ b/kernel/kcsan/selftest.c
@@ -33,6 +33,9 @@ static bool test_encode_decode(void)
unsigned long addr;
prandom_bytes(&addr, sizeof(addr));
+ if (addr < PAGE_SIZE)
+ addr = PAGE_SIZE;
+
if (WARN_ON(!check_encodable(addr, size)))
return false;
--
2.9.5
next prev parent reply other threads:[~2020-11-05 22:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 22:03 [PATCH kcsan 0/3] KCSAN updates for 5.11 Paul E. McKenney
2020-11-05 22:03 ` paulmck [this message]
2020-11-05 22:03 ` [PATCH kcsan 2/3] kcsan: Never set up watchpoints on NULL pointers paulmck
2020-11-05 22:03 ` [PATCH kcsan 3/3] kcsan: Fix encoding masks and regain address bit paulmck
2020-11-06 1:23 ` Boqun Feng
2020-11-06 9:03 ` Marco Elver
2020-11-06 10:18 ` Boqun Feng
2020-11-06 10:47 ` Marco Elver
2020-11-06 9:34 ` [PATCH v2] " Marco Elver
2020-11-06 10:19 ` Boqun Feng
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