From: Sami Tolvanen <samitolvanen@google.com>
Date: Fri, 24 May 2019 22:11:16 +0000 (-0700)
Subject: arm64: fix syscall_fn_t type
X-Git-Tag: v5.15~6257^2~2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=8ef8f368ce72b5e17f7c1f1ef15c38dcfd0fef64;p=mirror_ubuntu-kernels.git

arm64: fix syscall_fn_t type

Syscall wrappers in <asm/syscall_wrapper.h> use const struct pt_regs *
as the argument type. Use const in syscall_fn_t as well to fix indirect
call type mismatches with Control-Flow Integrity checking.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index a65167f5cded..e8bcb9ecede9 100644
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -20,7 +20,7 @@
 #include <linux/compat.h>
 #include <linux/err.h>
 
-typedef long (*syscall_fn_t)(struct pt_regs *regs);
+typedef long (*syscall_fn_t)(const struct pt_regs *regs);
 
 extern const syscall_fn_t sys_call_table[];