1 files changed, 21 insertions, 16 deletions

diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index a41c8a5c2007..896863fb208a 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -219,6 +219,21 @@ out:
         return err;
 }
 
+int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
+{
+        if (ARCH_SUN4C_SUN4 &&
+            (len > 0x20000000 ||
+             ((flags & MAP_FIXED) &&
+              addr < 0xe0000000 && addr + len > 0x20000000)))
+                return -EINVAL;
+
+        /* See asm-sparc/uaccess.h */
+        if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
+                return -EINVAL;
+
+        return 0;
+}
+
 /* Linux version of mmap */
 static unsigned long do_mmap2(unsigned long addr, unsigned long len,
         unsigned long prot, unsigned long flags, unsigned long fd,
@@ -233,25 +248,13 @@ static unsigned long do_mmap2(unsigned long addr, unsigned long len,
                         goto out;
         }
 
-        retval = -EINVAL;
         len = PAGE_ALIGN(len);
-        if (ARCH_SUN4C_SUN4 &&
-            (len > 0x20000000 ||
-             ((flags & MAP_FIXED) &&
-              addr < 0xe0000000 && addr + len > 0x20000000)))
-                goto out_putf;
-
-        /* See asm-sparc/uaccess.h */
-        if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
-                goto out_putf;
-
         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
 
         down_write(&current->mm->mmap_sem);
         retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
         up_write(&current->mm->mmap_sem);
 
-out_putf:
         if (file)
                 fput(file);
 out:
@@ -467,19 +470,21 @@ asmlinkage int sys_getdomainname(char __user *name, int len)
 {
         int nlen, err;
         
-        if (len < 0 || len > __NEW_UTS_LEN)
+        if (len < 0)
                 return -EINVAL;
 
         down_read(&uts_sem);
         
         nlen = strlen(system_utsname.domainname) + 1;
-        if (nlen < len)
-                len = nlen;
+        err = -EINVAL;
+        if (nlen > len)
+                goto out;
 
         err = -EFAULT;
-        if (!copy_to_user(name, system_utsname.domainname, len))
+        if (!copy_to_user(name, system_utsname.domainname, nlen))
                 err = 0;
 
+out:
         up_read(&uts_sem);
         return err;
 }