| 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
| ||
|
Message-Id: <20240123132335.2034611-1-arnd@kernel.org>
Date: Tue, 23 Jan 2024 14:23:20 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Yoshinori Sato <ysato@...rs.sourceforge.jp>,
Rich Felker <dalias@...c.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Cc: Arnd Bergmann <arnd@...db.de>,
linux-sh@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org
Subject: [PATCH] sh: use generic uaccess
From: Arnd Bergmann <arnd@...db.de>
As reported by many people, the nommu SH code runs into a compiler error
with a newly added syscall:
+ {standard input}: Error: displacement to undefined symbol .L105 overflows 8-bit field : => 590, 593
+ {standard input}: Error: displacement to undefined symbol .L135 overflows 8-bit field : => 603
+ {standard input}: Error: displacement to undefined symbol .L140 overflows 8-bit field : => 606
+ {standard input}: Error: displacement to undefined symbol .L76 overflows 12-bit field: => 591, 594
+ {standard input}: Error: displacement to undefined symbol .L77 overflows 8-bit field : 607 => 607, 582, 585
+ {standard input}: Error: displacement to undefined symbol .L97 overflows 12-bit field: => 607
+ {standard input}: Error: pcrel too far: 604, 590, 577, 593, 572, 569, 598, 599, 596, 610 => 610, 574, 599, 569, 598, 596, 601, 590, 604, 595, 572, 577, 593
Avoid the code that triggers this entirely by using the same generic
uaccess code that m68k and riscv have on nommu.
Link: https://lore.kernel.org/all/07d8877b-d933-46f4-8ca4-c10ed602f37e@app.fastmail.com/
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/sh/include/asm/uaccess.h | 5 +++++
arch/sh/include/asm/uaccess_32.h | 23 -----------------------
2 files changed, 5 insertions(+), 23 deletions(-)
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h
index a79609eb14be..b42764d55901 100644
--- a/arch/sh/include/asm/uaccess.h
+++ b/arch/sh/include/asm/uaccess.h
@@ -2,6 +2,7 @@
#ifndef __ASM_SH_UACCESS_H
#define __ASM_SH_UACCESS_H
+#ifdef CONFIG_MMU
#include <asm/extable.h>
#include <asm-generic/access_ok.h>
@@ -130,4 +131,8 @@ struct mem_access {
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma, int, unsigned long address);
+#else
+#include <asm-generic/uaccess.h>
+#endif
+
#endif /* __ASM_SH_UACCESS_H */
diff --git a/arch/sh/include/asm/uaccess_32.h b/arch/sh/include/asm/uaccess_32.h
index 5d7ddc092afd..e053f2fd245c 100644
--- a/arch/sh/include/asm/uaccess_32.h
+++ b/arch/sh/include/asm/uaccess_32.h
@@ -35,7 +35,6 @@ do { \
} \
} while (0)
-#ifdef CONFIG_MMU
#define __get_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
@@ -56,16 +55,6 @@ __asm__ __volatile__( \
".previous" \
:"=&r" (err), "=&r" (x) \
:"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
-#else
-#define __get_user_asm(x, addr, err, insn) \
-do { \
- __asm__ __volatile__ ( \
- "mov." insn " %1, %0\n\t" \
- : "=&r" (x) \
- : "m" (__m(addr)) \
- ); \
-} while (0)
-#endif /* CONFIG_MMU */
extern void __get_user_unknown(void);
@@ -140,7 +129,6 @@ do { \
} \
} while (0)
-#ifdef CONFIG_MMU
#define __put_user_asm(x, addr, err, insn) \
do { \
__asm__ __volatile__ ( \
@@ -164,17 +152,6 @@ do { \
: "memory" \
); \
} while (0)
-#else
-#define __put_user_asm(x, addr, err, insn) \
-do { \
- __asm__ __volatile__ ( \
- "mov." insn " %0, %1\n\t" \
- : /* no outputs */ \
- : "r" (x), "m" (__m(addr)) \
- : "memory" \
- ); \
-} while (0)
-#endif /* CONFIG_MMU */
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
#define __put_user_u64(val,addr,retval) \
--
2.39.2
Powered by blists - more mailing lists