x86: signal: put give_sigsegv of setup frames together

When setup frame fails, force_sigsegv is called and returns -EFAULT.
There is similar code in ia32_setup_frame(), ia32_setup_rt_frame(),
__setup_frame() and __setup_rt_frame().

Make them identical.

No change in functionality intended.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 32 insertions, 42 deletions

diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 8d64c1bc8474..5f42cfcc1c5a 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -444,21 +444,21 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
         frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
+                return -EFAULT;
 
         err |= __put_user(sig, &frame->sig);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         err |= ia32_setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         if (_COMPAT_NSIG_WORDS > 1) {
                 err |= __copy_to_user(frame->extramask, &set->sig[1],
                                       sizeof(frame->extramask));
                 if (err)
-                        goto give_sigsegv;
+                        return -EFAULT;
         }
 
         if (ka->sa.sa_flags & SA_RESTORER) {
@@ -479,7 +479,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
          */
         err |= __copy_to_user(frame->retcode, &code, 8);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up registers for signal handler */
         regs->sp = (unsigned long) frame;
@@ -502,10 +502,6 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 #endif
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
 
 int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
@@ -533,14 +529,14 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
+                return -EFAULT;
 
         err |= __put_user(sig, &frame->sig);
         err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo);
         err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc);
         err |= copy_siginfo_to_user32(&frame->info, info);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Create the ucontext.  */
         if (cpu_has_xsave)
@@ -556,7 +552,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                                      regs, set->sig[0]);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         if (ka->sa.sa_flags & SA_RESTORER)
                 restorer = ka->sa.sa_restorer;
@@ -571,7 +567,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
          */
         err |= __copy_to_user(frame->retcode, &code, 8);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up registers for signal handler */
         regs->sp = (unsigned long) frame;
@@ -599,8 +595,4 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 #endif
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index b668efc18eae..1c22e0067fe7 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -349,21 +349,21 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
         frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
+                return -EFAULT;
 
         err = __put_user(sig, &frame->sig);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         err = setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         if (_NSIG_WORDS > 1) {
                 err = __copy_to_user(&frame->extramask, &set->sig[1],
                                       sizeof(frame->extramask));
                 if (err)
-                        goto give_sigsegv;
+                        return -EFAULT;
         }
 
         if (current->mm->context.vdso)
@@ -388,7 +388,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
         err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
 
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up registers for signal handler */
         regs->sp = (unsigned long)frame;
@@ -403,10 +403,6 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
         regs->cs = __USER_CS;
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
 
 static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
@@ -420,14 +416,14 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
+                return -EFAULT;
 
         err |= __put_user(sig, &frame->sig);
         err |= __put_user(&frame->info, &frame->pinfo);
         err |= __put_user(&frame->uc, &frame->puc);
         err |= copy_siginfo_to_user(&frame->info, info);
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Create the ucontext.  */
         if (cpu_has_xsave)
@@ -443,7 +439,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                                 regs, set->sig[0]);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up to return from userspace.  */
         restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
@@ -463,7 +459,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
 
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up registers for signal handler */
         regs->sp = (unsigned long)frame;
@@ -478,10 +474,6 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         regs->cs = __USER_CS;
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
 
 /*
@@ -506,6 +498,11 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         else
                 ret = __setup_frame(usig, ka, set, regs);
 
+        if (ret) {
+                force_sigsegv(sig, current);
+                return -EFAULT;
+        }
+
         return ret;
 }
 
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index 43e6862fc7a2..3b79e179ba3a 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -215,12 +215,12 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 frame = get_stack(ka, regs, sizeof(struct rt_sigframe)) - 8;
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-                goto give_sigsegv;
+                return -EFAULT;
 
         if (ka->sa.sa_flags & SA_SIGINFO) {
                 err |= copy_siginfo_to_user(&frame->info, info);
                 if (err)
-                        goto give_sigsegv;
+                        return -EFAULT;
         }
 
         /* Create the ucontext.  */
@@ -248,11 +248,11 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
         } else {
                 /* could use a vstub here */
-                goto give_sigsegv;
+                return -EFAULT;
         }
 
         if (err)
-                goto give_sigsegv;
+                return -EFAULT;
 
         /* Set up registers for signal handler */
         regs->di = sig;
@@ -272,10 +272,6 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         regs->cs = __USER_CS;
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
 
 /*
@@ -297,6 +293,11 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 #endif
         ret = __setup_rt_frame(sig, ka, info, set, regs);
 
+        if (ret) {
+                force_sigsegv(sig, current);
+                return -EFAULT;
+        }
+
         return ret;
 }