From: James Hogan <james.hogan@imgtec.com>
To: <linux-kernel@vger.kernel.org>
Cc: <linux-arch@vger.kernel.org>,
James Hogan <james.hogan@imgtec.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Subject: [PATCH v2 07/11] test_user_copy: Check __copy_{to,from}_user_inatomic()
Date: Fri, 7 Aug 2015 16:22:00 +0100 [thread overview]
Message-ID: <1438960924-23628-8-git-send-email-james.hogan@imgtec.com> (raw)
In-Reply-To: <1438960924-23628-1-git-send-email-james.hogan@imgtec.com>
Add basic success/failure checking of __copy_to_user_inatomic() and
__copy_from_user_inatomic(). For testing purposes these are similar to
their non-atomic non-checking friends, so the new tests match those for
__copy_to_user() and __copy_from_user().
New tests:
- legitimate __copy_from_user_inatomic
- legitimate __copy_to_user_inatomic
- illegal all-kernel __copy_from_user_inatomic
- illegal reversed __copy_from_user_inatomic
- illegal all-kernel __copy_to_user_inatomic
- illegal reversed __copy_to_user_inatomic
- legitimate all-kernel __copy_from_user_inatomic
- legitimate all-kernel __copy_to_user_inatomic
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
lib/test_user_copy.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/lib/test_user_copy.c b/lib/test_user_copy.c
index 23fb9d15f50c..c002fc1286bd 100644
--- a/lib/test_user_copy.c
+++ b/lib/test_user_copy.c
@@ -75,8 +75,12 @@ static int __init test_user_copy_init(void)
"legitimate access_ok VERIFY_WRITE failed");
ret |= test(__copy_from_user(kmem, usermem, PAGE_SIZE),
"legitimate __copy_from_user failed");
+ ret |= test(__copy_from_user_inatomic(kmem, usermem, PAGE_SIZE),
+ "legitimate __copy_from_user_inatomic failed");
ret |= test(__copy_to_user(usermem, kmem, PAGE_SIZE),
"legitimate __copy_to_user failed");
+ ret |= test(__copy_to_user_inatomic(usermem, kmem, PAGE_SIZE),
+ "legitimate __copy_to_user_inatomic failed");
ret |= test(__get_user(value, (unsigned long __user *)usermem),
"legitimate __get_user failed");
ret |= test(__put_user(value, (unsigned long __user *)usermem),
@@ -118,12 +122,25 @@ static int __init test_user_copy_init(void)
ret |= test(!__copy_from_user(bad_usermem, (char __user *)kmem,
PAGE_SIZE),
"illegal reversed __copy_from_user passed");
+ ret |= test(!__copy_from_user_inatomic(kmem,
+ (char __user *)(kmem + PAGE_SIZE),
+ PAGE_SIZE),
+ "illegal all-kernel __copy_from_user_inatomic passed");
+ ret |= test(!__copy_from_user_inatomic(bad_usermem, (char __user *)kmem,
+ PAGE_SIZE),
+ "illegal reversed __copy_from_user_inatomic passed");
ret |= test(!__copy_to_user((char __user *)kmem, kmem + PAGE_SIZE,
PAGE_SIZE),
"illegal all-kernel __copy_to_user passed");
ret |= test(!__copy_to_user((char __user *)kmem, bad_usermem,
PAGE_SIZE),
"illegal reversed __copy_to_user passed");
+ ret |= test(!__copy_to_user_inatomic((char __user *)kmem,
+ kmem + PAGE_SIZE, PAGE_SIZE),
+ "illegal all-kernel __copy_to_user_inatomic passed");
+ ret |= test(!__copy_to_user_inatomic((char __user *)kmem, bad_usermem,
+ PAGE_SIZE),
+ "illegal reversed __copy_to_user_inatomic passed");
ret |= test(!__get_user(value, (unsigned long __user *)kmem),
"illegal __get_user passed");
ret |= test(!__put_user(value, (unsigned long __user *)kmem),
@@ -157,9 +174,16 @@ static int __init test_user_copy_init(void)
ret |= test(__copy_from_user(kmem, (char __user *)(kmem + PAGE_SIZE),
PAGE_SIZE),
"legitimate all-kernel __copy_from_user failed");
+ ret |= test(__copy_from_user_inatomic(kmem,
+ (char __user *)(kmem + PAGE_SIZE),
+ PAGE_SIZE),
+ "legitimate all-kernel __copy_from_user_inatomic failed");
ret |= test(__copy_to_user((char __user *)kmem, kmem + PAGE_SIZE,
PAGE_SIZE),
"legitimate all-kernel __copy_to_user failed");
+ ret |= test(__copy_to_user_inatomic((char __user *)kmem,
+ kmem + PAGE_SIZE, PAGE_SIZE),
+ "legitimate all-kernel __copy_to_user_inatomic failed");
ret |= test(__get_user(value, (unsigned long __user *)kmem),
"legitimate kernel __get_user failed");
ret |= test(__put_user(value, (unsigned long __user *)kmem),
--
2.3.6
next prev parent reply other threads:[~2015-08-07 15:23 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-07 15:21 [PATCH v2 00/11] test_user_copy improvements James Hogan
2015-08-07 15:21 ` [PATCH v2 01/11] microblaze: Export __strnlen_user to modules James Hogan
2015-08-07 15:21 ` [PATCH v2 02/11] nios2: Export strncpy_from_user / strnlen_user " James Hogan
2015-08-10 8:10 ` Ley Foon Tan
2015-08-07 15:21 ` [PATCH v2 03/11] openrisc: Export __clear_user " James Hogan
2015-08-07 15:21 ` [PATCH v2 04/11] xtensa: Export __strnlen_user " James Hogan
2015-08-07 15:21 ` [PATCH v2 05/11] test_user_copy: Check legit kernel accesses James Hogan
2015-08-07 15:21 ` [PATCH v2 06/11] test_user_copy: Check unchecked accessors James Hogan
2015-08-07 15:22 ` James Hogan [this message]
2015-08-07 15:22 ` [PATCH v2 08/11] test_user_copy: Check __clear_user()/clear_user() James Hogan
2015-08-07 15:22 ` [PATCH v2 09/11] test_user_copy: Check user string accessors James Hogan
2015-08-07 15:22 ` [PATCH v2 10/11] test_user_copy: Check user compatibility accessors James Hogan
2015-08-07 15:22 ` [PATCH v2 11/11] test_user_copy: Check user checksum functions James Hogan
2015-08-07 23:51 ` [PATCH v2 00/11] test_user_copy improvements Kees Cook
2015-08-10 22:29 ` David Miller
2015-08-11 4:08 ` David Miller
2015-08-11 11:20 ` Geert Uytterhoeven
2015-08-12 21:34 ` David Miller
2015-08-11 11:07 ` James Hogan
2015-08-11 17:32 ` David Miller
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