From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Robin Murphy <robin.murphy@arm.com>,
Kees Cook <keescook@chromium.org>,
Kate Stewart <kstewart@linuxfoundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Shuah Khan <shuah@kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
Kostya Serebryany <kcc@google.com>,
Evgeniy Stepanov <eugenis@google.com>,
Lee Smith <Lee.Smith@arm.com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
Jacob Bramley <Jacob.Bramley@arm.com>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
Chintan Pandya <cpandya@codeaurora.org>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH v9 1/8] arm64: add type casts to untagged_addr macro
Date: Mon, 10 Dec 2018 13:50:58 +0100 [thread overview]
Message-ID: <07836d7852b5c2d9588e28e4081a6f783689377c.1544445454.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1544445454.git.andreyknvl@google.com>
This patch makes the untagged_addr macro accept all kinds of address types
(void *, unsigned long, etc.) and allows not to specify type casts in each
place where it is used. This is done by using __typeof__.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
arch/arm64/include/asm/uaccess.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 07c34087bd5e..3c3864ba3cc1 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -101,7 +101,8 @@ static inline unsigned long __range_ok(const void __user *addr, unsigned long si
* up with a tagged userland pointer. Clear the tag to get a sane pointer to
* pass on to access_ok(), for instance.
*/
-#define untagged_addr(addr) sign_extend64(addr, 55)
+#define untagged_addr(addr) \
+ ((__typeof__(addr))sign_extend64((u64)(addr), 55))
#define access_ok(type, addr, size) __range_ok(addr, size)
#define user_addr_max get_fs
--
2.20.0.rc2.403.gdbc3b29805-goog
next prev parent reply other threads:[~2018-12-10 12:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 12:50 [PATCH v9 0/8] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-12-10 12:50 ` Andrey Konovalov [this message]
2018-12-10 12:50 ` [PATCH v9 2/8] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 3/8] arm64: untag user addresses in access_ok and __uaccess_mask_ptr Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 4/8] mm, arm64: untag user addresses in mm/gup.c Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 5/8] lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 6/8] fs, arm64: untag user address in copy_mount_options Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 7/8] arm64: update Documentation/arm64/tagged-pointers.txt Andrey Konovalov
2018-12-10 12:51 ` [PATCH v9 8/8] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2018-12-10 14:30 ` [RFC][PATCH 0/3] arm64 relaxed ABI Vincenzo Frascino
2018-12-10 14:30 ` [RFC][PATCH 1/3] elf: Make AT_FLAGS arch configurable Vincenzo Frascino
2018-12-10 14:30 ` [RFC][PATCH 2/3] arm64: Define Documentation/arm64/elf_at_flags.txt Vincenzo Frascino
2018-12-12 17:34 ` Dave Martin
2019-01-09 13:05 ` Vincenzo Frascino
2018-12-10 14:30 ` [RFC][PATCH 3/3] arm64: elf: Advertise relaxed ABI Vincenzo Frascino
2018-12-12 14:23 ` [RFC][PATCH 0/3] arm64 " Andrey Konovalov
2018-12-12 15:02 ` Catalin Marinas
2018-12-18 15:03 ` Andrey Konovalov
2018-12-18 17:59 ` Catalin Marinas
2018-12-19 12:52 ` Dave Martin
2019-02-11 17:28 ` Kevin Brodsky
2019-02-11 20:32 ` Evgenii Stepanov
2019-02-12 18:02 ` Catalin Marinas
2019-02-13 14:58 ` Dave Martin
2019-02-13 16:42 ` Kevin Brodsky
2019-02-13 17:43 ` Dave Martin
2019-02-13 21:41 ` Evgenii Stepanov
2019-02-14 11:22 ` Kevin Brodsky
2019-02-19 18:38 ` Szabolcs Nagy
2019-02-25 16:57 ` Catalin Marinas
2019-02-25 18:02 ` Szabolcs Nagy
2019-02-26 17:30 ` Kevin Brodsky
2018-12-12 17:01 ` [PATCH v9 0/8] arm64: untag user pointers passed to the kernel Dave Martin
2018-12-18 17:17 ` Andrey Konovalov
2019-02-11 11:35 ` Catalin Marinas
2019-02-11 17:02 ` Dave Martin
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