From: Ard Biesheuvel <ardb@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com,
Ard Biesheuvel <ardb@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
Kees Cook <keescook@chromium.org>
Subject: [PATCH 0/2] arm64: harden shadow call stack pointer handling
Date: Mon, 5 Dec 2022 21:03:39 +0100 [thread overview]
Message-ID: <20221205200341.463601-1-ardb@kernel.org> (raw)
A couple of tweaks to the arm64 entry code to avoid loading the shadow
call stack pointer in a way that could potentially be unsafe in the
context of ROP attacks.
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Kees Cook <keescook@chromium.org>
Ard Biesheuvel (2):
arm64: Always load shadow stack pointer directly from the task struct
arm64: Stash shadow stack pointer in the task struct on interrupt
arch/arm64/include/asm/scs.h | 7 ++++---
arch/arm64/kernel/entry.S | 16 +++++++---------
arch/arm64/kernel/head.S | 2 +-
3 files changed, 12 insertions(+), 13 deletions(-)
--
2.35.1
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next reply other threads:[~2022-12-05 20:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 20:03 Ard Biesheuvel [this message]
2022-12-05 20:03 ` [PATCH 1/2] arm64: Always load shadow stack pointer directly from the task struct Ard Biesheuvel
2022-12-05 20:03 ` [PATCH 2/2] arm64: Stash shadow stack pointer in the task struct on interrupt Ard Biesheuvel
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