linux-kernel - Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory syscalls

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Date:   Tue, 28 May 2019 14:05:18 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
        linux-media@...r.kernel.org, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Yishai Hadas <yishaih@...lanox.com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Alexander Deucher <Alexander.Deucher@....com>,
        Christian Koenig <Christian.Koenig@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Leon Romanovsky <leon@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Evgeniy Stepanov <eugenis@...gle.com>,
        Lee Smith <Lee.Smith@....com>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
        Jacob Bramley <Jacob.Bramley@....com>,
        Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
        Robin Murphy <robin.murphy@....com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Dave Martin <Dave.Martin@....com>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Szabolcs Nagy <Szabolcs.Nagy@....com>
Subject: Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory
 syscalls

On Mon, May 06, 2019 at 06:30:51PM +0200, Andrey Konovalov wrote:
>  /*
>   * Wrappers to pass the pt_regs argument.
>   */
>  #define sys_personality		sys_arm64_personality
> +#define sys_mmap_pgoff		sys_arm64_mmap_pgoff
> +#define sys_mremap		sys_arm64_mremap
> +#define sys_munmap		sys_arm64_munmap
> +#define sys_brk			sys_arm64_brk
> +#define sys_get_mempolicy	sys_arm64_get_mempolicy
> +#define sys_madvise		sys_arm64_madvise
> +#define sys_mbind		sys_arm64_mbind
> +#define sys_mlock		sys_arm64_mlock
> +#define sys_mlock2		sys_arm64_mlock2
> +#define sys_munlock		sys_arm64_munlock
> +#define sys_mprotect		sys_arm64_mprotect
> +#define sys_msync		sys_arm64_msync
> +#define sys_mincore		sys_arm64_mincore
> +#define sys_remap_file_pages	sys_arm64_remap_file_pages
> +#define sys_shmat		sys_arm64_shmat
> +#define sys_shmdt		sys_arm64_shmdt

This hunk should be (I sent a separate patch for sys_personality):

@@ -160,23 +163,23 @@ SYSCALL_DEFINE1(arm64_shmdt, char __user *, shmaddr)
 /*
  * Wrappers to pass the pt_regs argument.
  */
-#define sys_personality		sys_arm64_personality
-#define sys_mmap_pgoff		sys_arm64_mmap_pgoff
-#define sys_mremap		sys_arm64_mremap
-#define sys_munmap		sys_arm64_munmap
-#define sys_brk			sys_arm64_brk
-#define sys_get_mempolicy	sys_arm64_get_mempolicy
-#define sys_madvise		sys_arm64_madvise
-#define sys_mbind		sys_arm64_mbind
-#define sys_mlock		sys_arm64_mlock
-#define sys_mlock2		sys_arm64_mlock2
-#define sys_munlock		sys_arm64_munlock
-#define sys_mprotect		sys_arm64_mprotect
-#define sys_msync		sys_arm64_msync
-#define sys_mincore		sys_arm64_mincore
-#define sys_remap_file_pages	sys_arm64_remap_file_pages
-#define sys_shmat		sys_arm64_shmat
-#define sys_shmdt		sys_arm64_shmdt
+#define __arm64_sys_personality		__arm64_sys_arm64_personality
+#define __arm64_sys_mmap_pgoff		__arm64_sys_arm64_mmap_pgoff
+#define __arm64_sys_mremap		__arm64_sys_arm64_mremap
+#define __arm64_sys_munmap		__arm64_sys_arm64_munmap
+#define __arm64_sys_brk			__arm64_sys_arm64_brk
+#define __arm64_sys_get_mempolicy	__arm64_sys_arm64_get_mempolicy
+#define __arm64_sys_madvise		__arm64_sys_arm64_madvise
+#define __arm64_sys_mbind		__arm64_sys_arm64_mbind
+#define __arm64_sys_mlock		__arm64_sys_arm64_mlock
+#define __arm64_sys_mlock2		__arm64_sys_arm64_mlock2
+#define __arm64_sys_munlock		__arm64_sys_arm64_munlock
+#define __arm64_sys_mprotect		__arm64_sys_arm64_mprotect
+#define __arm64_sys_msync		__arm64_sys_arm64_msync
+#define __arm64_sys_mincore		__arm64_sys_arm64_mincore
+#define __arm64_sys_remap_file_pages	__arm64_sys_arm64_remap_file_pages
+#define __arm64_sys_shmat		__arm64_sys_arm64_shmat
+#define __arm64_sys_shmdt		__arm64_sys_arm64_shmdt
 
 asmlinkage long sys_ni_syscall(const struct pt_regs *);
 #define __arm64_sys_ni_syscall	sys_ni_syscall

-- 
Catalin