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: Chintan Pandya <cpandya@codeaurora.org>, Jacob Bramley <Jacob.Bramley@arm.com>, Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>, Andrey Konovalov <andreyknvl@google.com>, Lee Smith <Lee.Smith@arm.com>, Kostya Serebryany <kcc@google.com>, Dmitry Vyukov <dvyukov@google.com>, Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>, Luc Van Oostenryck <luc.vanoostenryck@gmail.com>, Evgeniy Stepanov <eugenis@google.com> Subject: [PATCH v9 2/8] uaccess: add untagged_addr definition for other arches Date: Mon, 10 Dec 2018 13:50:59 +0100 Message-ID: <35f97a89d5cc881f0f4052f43d56b3b7ed736581.1544445454.git.andreyknvl@google.com> (raw) In-Reply-To: <cover.1544445454.git.andreyknvl@google.com> To allow arm64 syscalls accept tagged pointers from userspace, we must untag them when they are passed to the kernel. Since untagging is done in generic parts of the kernel, the untagged_addr macro needs to be defined for all architectures. Define it as a noop for other architectures besides arm64. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- include/linux/uaccess.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index efe79c1cdd47..42b7a4ac65e2 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -13,6 +13,10 @@ #include <asm/uaccess.h> +#ifndef untagged_addr +#define untagged_addr(addr) (addr) +#endif + /* * Architectures should provide two primitives (raw_copy_{to,from}_user()) * and get rid of their private instances of copy_{to,from}_user() and -- 2.20.0.rc2.403.gdbc3b29805-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index 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 ` [PATCH v9 1/8] arm64: add type casts to untagged_addr macro Andrey Konovalov 2018-12-10 12:50 ` Andrey Konovalov [this message] 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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