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Date: Wed, 18 Aug 2010 14:07:13 +0900
From: Namhyung Kim <namhyung@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/ia32: mark address space properly
Some of address space conversion code lack proper __user/__force markups.
This results in a lot of annoying sparse warnings. Fix it.
Signed-off-by: Namhyung Kim <namhyung@...il.com>
---
arch/x86/ia32/ia32_signal.c | 19 +++++++++++--------
arch/x86/ia32/sys_ia32.c | 12 ++++++------
2 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 588a7aa..348928a 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -167,7 +167,8 @@ asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
}
seg = get_fs();
set_fs(KERNEL_DS);
- ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->sp);
+ ret = do_sigaltstack(uss_ptr ? (stack_t __user __force *)&uss : NULL,
+ (stack_t __user __force *)&uoss, regs->sp);
set_fs(seg);
if (ret >= 0 && uoss_ptr) {
if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t)))
@@ -374,7 +375,7 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
*/
static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
size_t frame_size,
- void **fpstate)
+ void __user **fpstate)
{
unsigned long sp;
@@ -395,9 +396,9 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
if (used_math()) {
sp = sp - sig_xstate_ia32_size;
- *fpstate = (struct _fpstate_ia32 *) sp;
+ *fpstate = (struct _fpstate_ia32 __user *) sp;
if (save_i387_xstate_ia32(*fpstate) < 0)
- return (void __user *) -1L;
+ return (void __user __force *) -1L;
}
sp -= frame_size;
@@ -448,7 +449,8 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
} else {
/* Return stub is in 32bit vsyscall page */
if (current->mm->context.vdso)
- restorer = VDSO32_SYMBOL(current->mm->context.vdso,
+ restorer = (void __user __force *)
+ VDSO32_SYMBOL(current->mm->context.vdso,
sigreturn);
else
restorer = &frame->retcode;
@@ -461,7 +463,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
* These are actually not used anymore, but left because some
* gdb versions depend on them as a marker.
*/
- put_user_ex(*((u64 *)&code), (u64 *)frame->retcode);
+ put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode);
} put_user_catch(err);
if (err)
@@ -534,7 +536,8 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
else
- restorer = VDSO32_SYMBOL(current->mm->context.vdso,
+ restorer = (void __user __force *)
+ VDSO32_SYMBOL(current->mm->context.vdso,
rt_sigreturn);
put_user_ex(ptr_to_compat(restorer), &frame->pretcode);
@@ -542,7 +545,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* Not actually used anymore, but left because some gdb
* versions need it.
*/
- put_user_ex(*((u64 *)&code), (u64 *)frame->retcode);
+ put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode);
} put_user_catch(err);
if (err)
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index 9677f8e..769a16a 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -309,8 +309,8 @@ asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
}
set_fs(KERNEL_DS);
ret = sys_rt_sigprocmask(how,
- set ? (sigset_t __user *)&s : NULL,
- oset ? (sigset_t __user *)&s : NULL,
+ set ? (sigset_t __user __force *)&s : NULL,
+ oset ? (sigset_t __user __force *)&s : NULL,
sigsetsize);
set_fs(old_fs);
if (ret)
@@ -354,7 +354,7 @@ asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
+ ret = sys_sched_rr_get_interval(pid, (struct timespec __user __force *)&t);
set_fs(old_fs);
if (put_compat_timespec(&t, interval))
return -EFAULT;
@@ -370,7 +370,7 @@ asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
+ ret = sys_rt_sigpending((sigset_t __user __force *)&s, sigsetsize);
set_fs(old_fs);
if (!ret) {
switch (_NSIG_WORDS) {
@@ -395,7 +395,7 @@ asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
if (copy_siginfo_from_user32(&info, uinfo))
return -EFAULT;
set_fs(KERNEL_DS);
- ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
+ ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user __force *)&info);
set_fs(old_fs);
return ret;
}
@@ -440,7 +440,7 @@ asmlinkage long sys32_sendfile(int out_fd, int in_fd,
return -EFAULT;
set_fs(KERNEL_DS);
- ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
+ ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user __force *)&of : NULL,
count);
set_fs(old_fs);
--
1.7.0.4
--
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