linux-kernel - [PATCH] arch/microblaze: add support for 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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <a6f97040-b021-c787-65da-9a10b7597238@infradead.org>
Date:   Tue, 6 Aug 2019 15:36:37 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>
Cc:     "Steven J. Magnani" <steve@...idescorp.com>,
        Michal Simek <monstr@...str.eu>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>
Subject: [PATCH] arch/microblaze: add support for get_user() of size 8 bytes

From: Randy Dunlap <rdunlap@...radead.org>

arch/microblaze/ is missing support for get_user() of size 8 bytes,
so add it by using __copy_from_user().

Fixes these build errors:
   drivers/infiniband/core/uverbs_main.o: In function `ib_uverbs_write':
   drivers/infiniband/core/.tmp_gl_uverbs_main.o:(.text+0x13a4): undefined reference to `__user_bad'
   drivers/android/binder.o: In function `binder_thread_write':
   drivers/android/.tmp_gl_binder.o:(.text+0xda6c): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xda98): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xdf10): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xe498): undefined reference to `__user_bad'
   drivers/android/binder.o:drivers/android/.tmp_gl_binder.o:(.text+0xea78): more undefined references to `__user_bad' follow

'make allmodconfig' now builds successfully for arch/microblaze/.

Fixes: 538722ca3b76 ("microblaze: fix get_user/put_user side-effects")
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Steven J. Magnani <steve@...idescorp.com>
Cc: Michal Simek <monstr@...str.eu>
Cc: Jason Gunthorpe <jgg@...lanox.com>
Cc: Leon Romanovsky <leonro@...lanox.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
 arch/microblaze/include/asm/uaccess.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- lnx-53-rc3.orig/arch/microblaze/include/asm/uaccess.h
+++ lnx-53-rc3/arch/microblaze/include/asm/uaccess.h
@@ -186,6 +186,9 @@ extern long __user_bad(void);
 			__get_user_asm("lw", __gu_addr, __gu_val,	\
 				       __gu_err);			\
 			break;						\
+		case 8:							\
+			__gu_err = __copy_from_user(&__gu_val, __gu_addr, 8);\
+			break;						\
 		default:						\
 			__gu_err = __user_bad();			\
 			break;						\
@@ -212,6 +215,9 @@ extern long __user_bad(void);
 	case 4:								\
 		__get_user_asm("lw", (ptr), __gu_val, __gu_err);	\
 		break;							\
+	case 8:								\
+		__gu_err = __copy_from_user(&__gu_val, ptr, 8);		\
+		break;							\
 	default:							\
 		/* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
 	}								\