From 6e16d89bcd668a95eb22add24c02d80890232b66 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Thu, 7 Feb 2008 00:15:57 -0800
Subject: [PATCH] Sanitize the type of struct user.u_ar0
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struct user.u_ar0 is defined to contain a pointer offset on all
architectures in which it is defined (all architectures which define an
a.out format except SPARC.) However, it has a pointer type in the headers,
which is pointless -- <asm/user.h> is not exported to userspace, and it
just makes the code messy.
Redefine the field as "unsigned long" (which is the same size as a pointer
on all Linux architectures) and change the setting code to user offsetof()
instead of hand-coded arithmetic.
Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org>
Cc: Bryan Wu <bryan.wu@analog.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: HÃ¥vard Skinnemoen <hskinnemoen@atmel.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
arch/x86/ia32/ia32_aout.c | 3 +--
fs/binfmt_aout.c | 2 +-
include/asm-alpha/user.h | 2 +-
include/asm-arm/user.h | 2 +-
include/asm-avr32/user.h | 2 +-
include/asm-blackfin/user.h | 2 +-
include/asm-cris/user.h | 2 +-
include/asm-h8300/user.h | 3 +--
include/asm-ia64/user.h | 2 +-
include/asm-m32r/user.h | 2 +-
include/asm-m68k/user.h | 3 +--
include/asm-mips/user.h | 2 +-
include/asm-powerpc/user.h | 2 +-
include/asm-s390/user.h | 3 +--
include/asm-sh/user.h | 2 +-
include/asm-v850/user.h | 2 +-
include/asm-x86/user_32.h | 2 +-
include/asm-x86/user_64.h | 2 +-
18 files changed, 18 insertions(+), 22 deletions(-)
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index e4c12079171b..58cccb6483b0 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -172,8 +172,7 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
has_dumped = 1;
current->flags |= PF_DUMPCORE;
strncpy(dump.u_comm, current->comm, sizeof(current->comm));
- dump.u_ar0 = (u32)(((unsigned long)(&dump.regs)) -
- ((unsigned long)(&dump)));
+ dump.u_ar0 = offsetof(struct user32, regs);
dump.signal = signr;
dump_thread32(regs, &dump);
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 7596e1e94cde..7f65e71bf859 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -115,7 +115,7 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, u
current->flags |= PF_DUMPCORE;
strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
#ifndef __sparc__
- dump.u_ar0 = (void *)(((unsigned long)(&dump.regs)) - ((unsigned long)(&dump)));
+ dump.u_ar0 = offsetof(struct user, regs);
#endif
dump.signal = signr;
dump_thread(regs, &dump);
diff --git a/include/asm-alpha/user.h b/include/asm-alpha/user.h
index 7e417fc9d491..a4eb6a4ca8d1 100644
--- a/include/asm-alpha/user.h
+++ b/include/asm-alpha/user.h
@@ -39,7 +39,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-arm/user.h b/include/asm-arm/user.h
index 3e8b0f879159..825c1e7c582d 100644
--- a/include/asm-arm/user.h
+++ b/include/asm-arm/user.h
@@ -67,7 +67,7 @@ struct user{
esp register. */
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
- struct pt_regs * u_ar0; /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
unsigned long magic; /* To uniquely identify a core file */
char u_comm[32]; /* User command that was responsible */
diff --git a/include/asm-avr32/user.h b/include/asm-avr32/user.h
index 060fb3acee49..7e9152f81f5e 100644
--- a/include/asm-avr32/user.h
+++ b/include/asm-avr32/user.h
@@ -51,7 +51,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-blackfin/user.h b/include/asm-blackfin/user.h
index abc34629bd59..afe6a0e1f7ce 100644
--- a/include/asm-blackfin/user.h
+++ b/include/asm-blackfin/user.h
@@ -75,7 +75,7 @@ struct user {
esp register. */
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
- struct user_regs_struct *u_ar0;
+ unsigned long u_ar0;
/* Used by gdb to help find the values for */
/* the registers. */
unsigned long magic; /* To uniquely identify a core file */
diff --git a/include/asm-cris/user.h b/include/asm-cris/user.h
index 2538e2a003df..73e60fcbcf38 100644
--- a/include/asm-cris/user.h
+++ b/include/asm-cris/user.h
@@ -38,7 +38,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-h8300/user.h b/include/asm-h8300/user.h
index 6c64f99af3e1..14a9e18950f1 100644
--- a/include/asm-h8300/user.h
+++ b/include/asm-h8300/user.h
@@ -62,8 +62,7 @@ struct user{
esp register. */
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
- struct user_regs_struct *u_ar0;
- /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
unsigned long magic; /* To uniquely identify a core file */
char u_comm[32]; /* User command that was responsible */
diff --git a/include/asm-ia64/user.h b/include/asm-ia64/user.h
index 78e5a20140aa..8b9821110348 100644
--- a/include/asm-ia64/user.h
+++ b/include/asm-ia64/user.h
@@ -44,7 +44,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-m32r/user.h b/include/asm-m32r/user.h
index 035258d713d0..03b3c11c2aff 100644
--- a/include/asm-m32r/user.h
+++ b/include/asm-m32r/user.h
@@ -38,7 +38,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-m68k/user.h b/include/asm-m68k/user.h
index 8c56ccab4849..f1f478d6e050 100644
--- a/include/asm-m68k/user.h
+++ b/include/asm-m68k/user.h
@@ -72,8 +72,7 @@ struct user{
esp register. */
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
- struct user_regs_struct *u_ar0;
- /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
struct user_m68kfp_struct* u_fpstate; /* Math Co-processor pointer. */
unsigned long magic; /* To uniquely identify a core file */
diff --git a/include/asm-mips/user.h b/include/asm-mips/user.h
index 89bf8b4cab3c..afa83a4c1888 100644
--- a/include/asm-mips/user.h
+++ b/include/asm-mips/user.h
@@ -44,7 +44,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-powerpc/user.h b/include/asm-powerpc/user.h
index ba8dd4c12d96..3fd4545dd74e 100644
--- a/include/asm-powerpc/user.h
+++ b/include/asm-powerpc/user.h
@@ -38,7 +38,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-s390/user.h b/include/asm-s390/user.h
index 1dc74baf03c4..1b050e35fdc6 100644
--- a/include/asm-s390/user.h
+++ b/include/asm-s390/user.h
@@ -63,8 +63,7 @@ struct user {
the top of the stack is always found in the
esp register. */
long int signal; /* Signal that caused the core dump. */
- struct user_regs_struct *u_ar0;
- /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
unsigned long magic; /* To uniquely identify a core file */
char u_comm[32]; /* User command that was responsible */
diff --git a/include/asm-sh/user.h b/include/asm-sh/user.h
index 1a4f43c75126..8fd3cf6c58d4 100644
--- a/include/asm-sh/user.h
+++ b/include/asm-sh/user.h
@@ -52,7 +52,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
diff --git a/include/asm-v850/user.h b/include/asm-v850/user.h
index be90eea5285b..63cdc567d272 100644
--- a/include/asm-v850/user.h
+++ b/include/asm-v850/user.h
@@ -38,7 +38,7 @@ struct user {
unsigned long start_data; /* data starting address */
unsigned long start_stack; /* stack starting address */
long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
+ unsigned long u_ar0; /* help gdb find registers */
unsigned long magic; /* identifies a core file */
char u_comm[32]; /* user command name */
};
diff --git a/include/asm-x86/user_32.h b/include/asm-x86/user_32.h
index ed8b8fc6906c..6157da6f882c 100644
--- a/include/asm-x86/user_32.h
+++ b/include/asm-x86/user_32.h
@@ -116,7 +116,7 @@ struct user{
esp register. */
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
- struct user_pt_regs * u_ar0; /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
struct user_i387_struct* u_fpstate; /* Math Co-processor pointer. */
unsigned long magic; /* To uniquely identify a core file */
diff --git a/include/asm-x86/user_64.h b/include/asm-x86/user_64.h
index a5449d456cc0..963616455609 100644
--- a/include/asm-x86/user_64.h
+++ b/include/asm-x86/user_64.h
@@ -118,7 +118,7 @@ struct user{
long int signal; /* Signal that caused the core dump. */
int reserved; /* No longer used */
int pad1;
- struct user_pt_regs * u_ar0; /* Used by gdb to help find the values for */
+ unsigned long u_ar0; /* Used by gdb to help find the values for */
/* the registers. */
struct user_i387_struct* u_fpstate; /* Math Co-processor pointer. */
unsigned long magic; /* To uniquely identify a core file */
--
2.20.1