From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Andy Lutomirski <luto@kernel.org>
Subject: [PATCH v3 00/11] kentry: A stable bugfix and a bunch of improvements
Date: Thu, 4 Mar 2021 11:05:53 -0800 [thread overview]
Message-ID: <cover.1614884673.git.luto@kernel.org> (raw)
I noticed a little bug in fast compat syscalls. I got a bit carried away
fixing it. This renames the irqentry stuff to kentry, improves (IMNSHO)
the API, and adds lots of debugging.
It also tweaks the unwinder wrt ret_from_fork and rewrites ret_from_fork
in C. I did this because the kentry work involved a small change to
ret_from_fork, and adjusting the asm is a mess. So C it is.
Changes from v1 and v2: Complete rewrite
Andy Lutomirski (11):
x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls
kentry: Rename irqentry to kentry
x86/dumpstack: Remove unnecessary range check fetching opcode bytes
x86/kthread,dumpstack: Set task_pt_regs->cs.RPL=3 for kernel threads
x86/entry: Convert ret_from_fork to C
kentry: Simplify the common syscall API
kentry: Make entry/exit_to_user_mode() arm64-only
entry: Make CONFIG_DEBUG_ENTRY available outside x86
kentry: Add debugging checks for proper kentry API usage
kentry: Check that syscall entries and syscall exits match
kentry: Verify kentry state in instrumentation_begin/end()
arch/x86/Kconfig.debug | 10 --
arch/x86/entry/common.c | 85 ++++++++++----
arch/x86/entry/entry_32.S | 51 ++------
arch/x86/entry/entry_64.S | 33 ++----
arch/x86/include/asm/idtentry.h | 28 ++---
arch/x86/include/asm/switch_to.h | 2 +-
arch/x86/kernel/cpu/mce/core.c | 10 +-
arch/x86/kernel/dumpstack.c | 10 +-
arch/x86/kernel/kvm.c | 6 +-
arch/x86/kernel/nmi.c | 6 +-
arch/x86/kernel/process.c | 15 ++-
arch/x86/kernel/process_32.c | 2 +-
arch/x86/kernel/traps.c | 32 ++---
arch/x86/kernel/unwind_orc.c | 2 +-
arch/x86/mm/fault.c | 6 +-
include/asm-generic/bug.h | 8 +-
include/linux/entry-common.h | 180 ++++++++--------------------
include/linux/instrumentation.h | 25 +++-
include/linux/sched.h | 4 +
init/init_task.c | 8 ++
kernel/entry/common.c | 193 +++++++++++++++++++++----------
lib/Kconfig.debug | 11 ++
22 files changed, 366 insertions(+), 361 deletions(-)
--
2.29.2
next reply other threads:[~2021-03-04 19:07 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 19:05 Andy Lutomirski [this message]
2021-03-04 19:05 ` [PATCH v3 01/11] x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls Andy Lutomirski
2021-03-05 10:16 ` [tip: x86/urgent] " tip-bot2 for Andy Lutomirski
2021-03-06 10:44 ` tip-bot2 for Andy Lutomirski
2021-03-06 12:18 ` tip-bot2 for Andy Lutomirski
2021-03-04 19:05 ` [PATCH v3 02/11] kentry: Rename irqentry to kentry Andy Lutomirski
2021-03-08 9:45 ` Mark Rutland
2021-03-04 19:05 ` [PATCH v3 03/11] x86/dumpstack: Remove unnecessary range check fetching opcode bytes Andy Lutomirski
2021-03-04 19:05 ` [PATCH v3 04/11] x86/kthread,dumpstack: Set task_pt_regs->cs.RPL=3 for kernel threads Andy Lutomirski
2021-03-04 20:19 ` Ira Weiny
2021-03-04 19:05 ` [PATCH v3 05/11] x86/entry: Convert ret_from_fork to C Andy Lutomirski
2021-03-05 0:55 ` Brian Gerst
2021-03-04 19:05 ` [PATCH v3 06/11] kentry: Simplify the common syscall API Andy Lutomirski
2021-03-08 9:49 ` Mark Rutland
2021-03-04 19:06 ` [PATCH v3 07/11] kentry: Make entry/exit_to_user_mode() arm64-only Andy Lutomirski
2021-03-08 10:06 ` Mark Rutland
2021-03-14 1:18 ` Andy Lutomirski
2021-03-04 19:06 ` [PATCH v3 08/11] entry: Make CONFIG_DEBUG_ENTRY available outside x86 Andy Lutomirski
2021-03-08 10:13 ` Mark Rutland
2021-03-29 11:50 ` Sven Schnelle
2021-03-04 19:06 ` [PATCH v3 09/11] kentry: Add debugging checks for proper kentry API usage Andy Lutomirski
2021-03-04 19:06 ` [PATCH v3 10/11] kentry: Check that syscall entries and syscall exits match Andy Lutomirski
2021-03-04 19:06 ` [PATCH v3 11/11] kentry: Verify kentry state in instrumentation_begin/end() Andy Lutomirski
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