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>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Eric Dumazet <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
netdev@vger.kernel.org, bpf@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>,
Dave Martin <Dave.Martin@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH v12 01/13] uaccess: add untagged_addr definition for other arches
Date: Mon, 18 Mar 2019 18:17:33 +0100 [thread overview]
Message-ID: <bee403f76b40f37c6790d144a4142f293e0a7d9f.1552929301.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1552929301.git.andreyknvl@google.com>
To allow arm64 syscalls to 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 architectures other than arm64.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
include/linux/mm.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 76769749b5a5..4d674518d392 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -99,6 +99,10 @@ extern int mmap_rnd_compat_bits __read_mostly;
#include <asm/pgtable.h>
#include <asm/processor.h>
+#ifndef untagged_addr
+#define untagged_addr(addr) (addr)
+#endif
+
#ifndef __pa_symbol
#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
#endif
--
2.21.0.225.g810b269d1ac-goog
next prev parent reply other threads:[~2019-03-18 17:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 17:17 [PATCH v12 00/13] arm64: untag user pointers passed to the kernel Andrey Konovalov
2019-03-18 17:17 ` Andrey Konovalov [this message]
2019-03-18 17:17 ` [PATCH v12 02/13] arm64: untag user pointers in access_ok and __uaccess_mask_ptr Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 03/13] lib, arm64: untag user pointers in strn*_user Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 04/13] mm, arm64: untag user pointers passed to memory syscalls Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 05/13] mm, arm64: untag user pointers in mm/gup.c Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 06/13] fs, arm64: untag user pointers in copy_mount_options Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 07/13] fs, arm64: untag user pointers in fs/userfaultfd.c Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 08/13] net, arm64: untag user pointers in tcp_zerocopy_receive Andrey Konovalov
2019-03-18 17:35 ` Eric Dumazet
2019-03-19 16:14 ` Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 09/13] kernel, arm64: untag user pointers in prctl_set_mm* Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 10/13] tracing, arm64: untag user pointers in seq_print_user_ip Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 11/13] uprobes, arm64: untag user pointers in find_active_uprobe Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 12/13] bpf, arm64: untag user pointers in stack_map_get_build_id_offset Andrey Konovalov
2019-03-18 17:17 ` [PATCH v12 13/13] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2019-03-19 18:32 ` [PATCH v12 00/13] arm64: untag user pointers passed to the kernel Andrew Morton
2019-03-20 11:25 ` Catalin Marinas
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