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>,
Al Viro <viro@zeniv.linux.org.uk>,
Andrey Konovalov <andreyknvl@google.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>
Subject: [PATCH v6 00/11] arm64: untag user pointers passed to the kernel
Date: Thu, 30 Aug 2018 13:41:05 +0200 [thread overview]
Message-ID: <cover.1535629099.git.andreyknvl@google.com> (raw)
arm64 has a feature called Top Byte Ignore, which allows to embed pointer
tags into the top byte of each pointer. Userspace programs (such as
HWASan, a memory debugging tool [1]) might use this feature and pass
tagged user pointers to the kernel through syscalls or other interfaces.
This patch makes a few of the kernel interfaces accept tagged user
pointers. The kernel is already able to handle user faults with tagged
pointers and has the untagged_addr macro, which this patchset reuses.
Thanks!
[1] http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html
Changes in v6:
- Added annotations for user pointer casts found by sparse.
- Rebased onto 050cdc6c (4.19-rc1+).
Changes in v5:
- Added 3 new patches that add untagging to places found with static
analysis.
- Rebased onto 44c929e1 (4.18-rc8).
Changes in v4:
- Added a selftest for checking that passing tagged pointers to the
kernel succeeds.
- Rebased onto 81e97f013 (4.18-rc1+).
Changes in v3:
- Rebased onto e5c51f30 (4.17-rc6+).
- Added linux-arch@ to the list of recipients.
Changes in v2:
- Rebased onto 2d618bdf (4.17-rc3+).
- Removed excessive untagging in gup.c.
- Removed untagging pointers returned from __uaccess_mask_ptr.
Changes in v1:
- Rebased onto 4.17-rc1.
Changes in RFC v2:
- Added "#ifndef untagged_addr..." fallback in linux/uaccess.h instead of
defining it for each arch individually.
- Updated Documentation/arm64/tagged-pointers.txt.
- Dropped "mm, arm64: untag user addresses in memory syscalls".
- Rebased onto 3eb2ce82 (4.16-rc7).
Andrey Konovalov (11):
arm64: add type casts to untagged_addr macro
uaccess: add untagged_addr definition for other arches
arm64: untag user addresses in access_ok and __uaccess_mask_ptr
mm, arm64: untag user addresses in mm/gup.c
lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user
arm64: untag user address in __do_user_fault
fs, arm64: untag user address in copy_mount_options
usb, arm64: untag user addresses in devio
arm64: update Documentation/arm64/tagged-pointers.txt
selftests, arm64: add a selftest for passing tagged pointers to kernel
arm64: annotate user pointers casts detected by sparse
Documentation/arm64/tagged-pointers.txt | 5 +--
arch/arm64/include/asm/compat.h | 2 +-
arch/arm64/include/asm/uaccess.h | 16 ++++++----
arch/arm64/kernel/perf_callchain.c | 4 +--
arch/arm64/kernel/signal.c | 16 +++++-----
arch/arm64/kernel/signal32.c | 6 ++--
arch/arm64/mm/fault.c | 4 +--
block/compat_ioctl.c | 15 +++++----
drivers/ata/libata-scsi.c | 2 +-
drivers/block/loop.c | 2 +-
drivers/gpio/gpiolib.c | 8 +++--
drivers/input/evdev.c | 2 +-
drivers/media/dvb-core/dvb_frontend.c | 3 +-
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 9 +++---
drivers/mmc/core/block.c | 6 ++--
drivers/mtd/mtdchar.c | 2 +-
drivers/net/tap.c | 2 +-
drivers/net/tun.c | 2 +-
drivers/spi/spidev.c | 6 ++--
drivers/tty/tty_ioctl.c | 3 +-
drivers/tty/vt/vt_ioctl.c | 5 +--
drivers/usb/core/devio.c | 10 ++++--
drivers/vfio/vfio.c | 6 ++--
drivers/video/fbdev/core/fbmem.c | 4 +--
drivers/xen/gntdev.c | 6 ++--
drivers/xen/privcmd.c | 4 +--
fs/aio.c | 2 +-
fs/autofs/dev-ioctl.c | 3 +-
fs/autofs/root.c | 2 +-
fs/binfmt_elf.c | 10 +++---
fs/btrfs/ioctl.c | 2 +-
fs/compat_ioctl.c | 32 ++++++++++---------
fs/ext2/ioctl.c | 2 +-
fs/ext4/ioctl.c | 2 +-
fs/fat/file.c | 3 +-
fs/fuse/file.c | 2 +-
fs/namespace.c | 2 +-
fs/readdir.c | 4 +--
fs/signalfd.c | 10 +++---
include/linux/mm.h | 2 +-
include/linux/pagemap.h | 8 ++---
include/linux/socket.h | 2 +-
include/linux/uaccess.h | 4 +++
ipc/shm.c | 4 +--
kernel/futex.c | 6 ++--
kernel/futex_compat.c | 2 +-
kernel/power/user.c | 2 +-
kernel/signal.c | 2 +-
lib/iov_iter.c | 16 +++++-----
lib/strncpy_from_user.c | 4 ++-
lib/strnlen_user.c | 6 ++--
lib/test_kasan.c | 2 +-
mm/gup.c | 4 +++
mm/memory.c | 2 +-
mm/migrate.c | 4 +--
mm/process_vm_access.c | 13 ++++----
net/bluetooth/hidp/sock.c | 2 +-
net/compat.c | 12 ++++---
sound/core/control_compat.c | 5 +--
sound/core/pcm_native.c | 5 +--
sound/core/timer_compat.c | 3 +-
tools/testing/selftests/arm64/.gitignore | 1 +
tools/testing/selftests/arm64/Makefile | 11 +++++++
.../testing/selftests/arm64/run_tags_test.sh | 12 +++++++
tools/testing/selftests/arm64/tags_test.c | 19 +++++++++++
65 files changed, 232 insertions(+), 147 deletions(-)
create mode 100644 tools/testing/selftests/arm64/.gitignore
create mode 100644 tools/testing/selftests/arm64/Makefile
create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh
create mode 100644 tools/testing/selftests/arm64/tags_test.c
--
2.19.0.rc0.228.g281dcd1b4d0-goog
next reply other threads:[~2018-08-30 11:41 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 11:41 Andrey Konovalov [this message]
2018-08-30 11:41 ` [PATCH v6 01/11] arm64: add type casts to untagged_addr macro Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 02/11] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 03/11] arm64: untag user addresses in access_ok and __uaccess_mask_ptr Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 04/11] mm, arm64: untag user addresses in mm/gup.c Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 05/11] lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 06/11] arm64: untag user address in __do_user_fault Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 07/11] fs, arm64: untag user address in copy_mount_options Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 08/11] usb, arm64: untag user addresses in devio Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 09/11] arm64: update Documentation/arm64/tagged-pointers.txt Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 10/11] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 11/11] arm64: annotate user pointers casts detected by sparse Andrey Konovalov
2018-08-31 8:11 ` Luc Van Oostenryck
2018-08-31 13:42 ` Al Viro
2018-09-03 12:34 ` Andrey Konovalov
2018-09-03 13:49 ` Vincenzo Frascino
2018-09-03 15:10 ` Luc Van Oostenryck
2018-09-04 11:27 ` Vincenzo Frascino
2018-09-05 19:03 ` Luc Van Oostenryck
2018-09-06 14:13 ` Vincenzo Frascino
2018-09-06 20:10 ` Luc Van Oostenryck
2018-09-03 13:56 ` Al Viro
2018-09-06 21:13 ` Linus Torvalds
2018-09-06 21:16 ` Linus Torvalds
2018-09-06 23:08 ` Luc Van Oostenryck
2018-09-07 15:26 ` Catalin Marinas
2018-09-07 16:30 ` Linus Torvalds
2018-09-11 16:41 ` Catalin Marinas
2018-09-17 17:01 ` Andrey Konovalov
2018-09-24 15:04 ` Andrey Konovalov
2018-09-28 17:50 ` Catalin Marinas
2018-10-02 13:19 ` Andrey Konovalov
2018-09-14 1:25 ` [LKP] [arm64] 7b5b51e7b3: kvm-unit-tests.rmap_chain.fail kernel test robot
2018-08-30 11:48 ` [PATCH v6 00/11] arm64: untag user pointers passed to the kernel Andrey Konovalov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cover.1535629099.git.andreyknvl@google.com \
--to=andreyknvl@google.com \
--cc=Jacob.Bramley@arm.com \
--cc=Lee.Smith@arm.com \
--cc=Ramana.Radhakrishnan@arm.com \
--cc=Ruben.Ayrapetyan@arm.com \
--cc=akpm@linux-foundation.org \
--cc=catalin.marinas@arm.com \
--cc=cpandya@codeaurora.org \
--cc=dvyukov@google.com \
--cc=eugenis@google.com \
--cc=gregkh@linuxfoundation.org \
--cc=kcc@google.com \
--cc=keescook@chromium.org \
--cc=kirill.shutemov@linux.intel.com \
--cc=kstewart@linuxfoundation.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mark.rutland@arm.com \
--cc=mingo@kernel.org \
--cc=robin.murphy@arm.com \
--cc=shuah@kernel.org \
--cc=viro@zeniv.linux.org.uk \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).