linux-kernel - [PATCH] m68k: add missing __user annotation in get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200520065750.8401-1-jasowang@redhat.com>
Date:   Wed, 20 May 2020 14:57:50 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     geert@...ux-m68k.org
Cc:     linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
        mst@...hat.com, Jason Wang <jasowang@...hat.com>,
        kbuild test robot <lkp@...el.com>
Subject: [PATCH] m68k: add missing __user annotation in get_user()

The ptr is a pointer to userspace memory. So we need annotate it with
__user otherwise we may get sparse warnings like:

drivers/vhost/vhost.c:1603:13: sparse: sparse: incorrect type in initializer (different address spaces) @@    expected void const *__gu_ptr @@    got unsigned int [noderef] [usertypvoid const *__gu_ptr @@
drivers/vhost/vhost.c:1603:13: sparse:    expected void const *__gu_ptr
drivers/vhost/vhost.c:1603:13: sparse:    got unsigned int [noderef] [usertype] <asn:1> *idxp

Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-m68k@...ts.linux-m68k.org
Cc: linux-kernel@...r.kernel.org
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 arch/m68k/include/asm/uaccess_mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h
index 7e85de984df1..9ae9f8d05925 100644
--- a/arch/m68k/include/asm/uaccess_mm.h
+++ b/arch/m68k/include/asm/uaccess_mm.h
@@ -142,7 +142,7 @@ asm volatile ("\n"					\
 		__get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT);	\
 		break;							\
 	case 8: {							\
-		const void *__gu_ptr = (ptr);				\
+		const void __user *__gu_ptr = (ptr);			\
 		union {							\
 			u64 l;						\
 			__typeof__(*(ptr)) t;				\
-- 
2.20.1