linux-hardening - [PATCH v2 0/2] ARM: ptrace: Restore syscall skipping and restart while tracing

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Date:   Thu, 10 Aug 2023 12:54:17 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Russell King <linux@...linux.org.uk>
Cc:     Kees Cook <keescook@...omium.org>, Arnd Bergmann <arnd@...nel.org>,
        Lecopzer Chen <lecopzer.chen@...iatek.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Wolfram Sang <wsa@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Dan Williams <dan.j.williams@...el.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-hardening@...r.kernel.org
Subject: [PATCH v2 0/2] ARM: ptrace: Restore syscall skipping and restart while tracing

Hi,

Fix tracing on arm since commit 4e57a4ddf6b0 ("ARM: 9107/1: syscall:
always store thread_info->abi_syscall"). This was seen with the broken
seccomp tests "syscall_errno", "syscall_faked", and "syscall_restart".

Thanks!

-Kees

v2:
- split fixes
- move scno store into the actual restart path
v1: https://lore.kernel.org/lkml/20230804071045.never.134-kees@kernel.org

Kees Cook (2):
  ARM: ptrace: Restore syscall restart tracing
  ARM: ptrace: Restore syscall skipping for tracers

 arch/arm/include/asm/syscall.h | 3 +++
 arch/arm/kernel/entry-common.S | 1 +
 arch/arm/kernel/ptrace.c       | 5 +++--
 3 files changed, 7 insertions(+), 2 deletions(-)

-- 
2.34.1