linux-kernel - [PATCH 0/4] x86: fix syscall function type mismatches

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Date:   Fri, 13 Sep 2019 14:00:14 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Kees Cook <keescook@...omium.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Sami Tolvanen <samitolvanen@...gle.com>
Subject: [PATCH 0/4] x86: fix syscall function type mismatches

This patch set changes x64 and ia32 syscall wrappers and related
functions to use function types that match sys_call_ptr_t. This fixes
indirect call mismatches with Control-Flow Integrity (CFI) checking.

Sami Tolvanen (4):
  x86: use the correct function type in SYSCALL_DEFINE0
  x86: use the correct function type for sys32_(rt_)sigreturn
  x86: use the correct function type for sys_ni_syscall
  x86: fix function types in COND_SYSCALL

 arch/x86/entry/syscall_32.c            | 13 ++++++--
 arch/x86/entry/syscall_64.c            | 12 +++++--
 arch/x86/entry/syscalls/syscall_32.tbl |  4 +--
 arch/x86/ia32/ia32_signal.c            |  4 +--
 arch/x86/include/asm/syscall_wrapper.h | 44 ++++++++++++++++----------
 5 files changed, 51 insertions(+), 26 deletions(-)

-- 
2.23.0.237.gc6a4ce50a0-goog