From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v1 07/15] powerpc/uaccess: Remove __unsafe_put_user_goto()
Date: Thu, 25 Feb 2021 17:50:37 +0000 (UTC) [thread overview]
Message-ID: <37821177867fdabd8aed8b7e4769922d232bb322.1614275314.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1614275314.git.christophe.leroy@csgroup.eu>
__unsafe_put_user_goto() is just an intermediate layer to
__put_user_size_goto() without added value other than doing
the __user pointer type checking.
Do the __user pointer type checking in __put_user_size_goto()
and remove __unsafe_put_user_goto().
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/include/asm/uaccess.h | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index c4bbc64758a0..a6d3563cf3ee 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -130,23 +130,17 @@ __pu_failed: \
#define __put_user_size_goto(x, ptr, size, label) \
do { \
+ __typeof__(*(ptr)) __user *__pus_addr = (ptr); \
+ \
switch (size) { \
- case 1: __put_user_asm_goto(x, ptr, label, "stb"); break; \
- case 2: __put_user_asm_goto(x, ptr, label, "sth"); break; \
- case 4: __put_user_asm_goto(x, ptr, label, "stw"); break; \
- case 8: __put_user_asm2_goto(x, ptr, label); break; \
+ case 1: __put_user_asm_goto(x, __pus_addr, label, "stb"); break; \
+ case 2: __put_user_asm_goto(x, __pus_addr, label, "sth"); break; \
+ case 4: __put_user_asm_goto(x, __pus_addr, label, "stw"); break; \
+ case 8: __put_user_asm2_goto(x, __pus_addr, label); break; \
default: __put_user_bad(); \
} \
} while (0)
-#define __unsafe_put_user_goto(x, ptr, size, label) \
-do { \
- __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- __chk_user_ptr(ptr); \
- __put_user_size_goto((x), __pu_addr, (size), label); \
-} while (0)
-
-
extern long __get_user_bad(void);
/*
@@ -405,7 +399,7 @@ user_write_access_begin(const void __user *ptr, size_t len)
} while (0)
#define unsafe_put_user(x, p, e) \
- __unsafe_put_user_goto((__typeof__(*(p)))(x), (p), sizeof(*(p)), e)
+ __put_user_size_goto((__typeof__(*(p)))(x), (p), sizeof(*(p)), e)
#define unsafe_copy_to_user(d, s, l, e) \
do { \
--
2.25.0
next prev parent reply other threads:[~2021-02-25 17:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-25 17:50 [PATCH v1 00/15] powerpc: Cleanup of uaccess.h Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 01/15] powerpc/uaccess: Remove __get_user_allowed() and unsafe_op_wrap() Christophe Leroy
2021-03-01 22:02 ` Daniel Axtens
2021-03-01 22:31 ` Segher Boessenkool
2021-03-10 8:14 ` Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 02/15] powerpc/uaccess: Define ___get_user_instr() for ppc32 Christophe Leroy
2021-03-01 22:20 ` Daniel Axtens
2021-02-25 17:50 ` [PATCH v1 03/15] powerpc/uaccess: Remove __get/put_user_inatomic() Christophe Leroy
2021-03-01 22:42 ` Daniel Axtens
2021-03-10 8:03 ` Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 04/15] powerpc/uaccess: Move get_user_instr helpers in asm/inst.h Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 05/15] powerpc/align: Don't use __get_user_instr() on kernel addresses Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 06/15] powerpc/uaccess: Call might_fault() inconditionaly Christophe Leroy
2021-02-25 17:50 ` Christophe Leroy [this message]
2021-02-25 17:50 ` [PATCH v1 08/15] powerpc/uaccess: Remove __chk_user_ptr() in __get/put_user Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 09/15] powerpc/uaccess: Remove calls to __get_user_bad() and __put_user_bad() Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 10/15] powerpc/uaccess: Split out __get_user_nocheck() Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 11/15] powerpc/uaccess: Rename __get/put_user_check/nocheck Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 12/15] powerpc/uaccess: Refactor get/put_user() and __get/put_user() Christophe Leroy
2021-03-07 10:23 ` kernel test robot
2021-03-08 12:14 ` Christophe Leroy
2021-03-08 14:43 ` Christian König
2021-02-25 17:50 ` [PATCH v1 13/15] powerpc/uaccess: Swap clear_user() and __clear_user() Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 14/15] powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32 Christophe Leroy
2021-02-25 17:50 ` [PATCH v1 15/15] powerpc/uaccess: Move copy_mc_xxx() functions down Christophe Leroy
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