1 files changed, 13 insertions, 0 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 9814e43fb23b..e483eb5530e4 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -33,6 +33,7 @@
 #include <linux/task_io_accounting_ops.h>
 #include <linux/seccomp.h>
 #include <linux/cpu.h>
+#include <linux/personality.h>
 #include <linux/ptrace.h>
 #include <linux/fs_struct.h>
 
@@ -1114,6 +1115,15 @@ out:
 
 DECLARE_RWSEM(uts_sem);
 
+#ifdef COMPAT_UTS_MACHINE
+#define override_architecture(name) \
+        (current->personality == PER_LINUX32 && \
+         copy_to_user(name->machine, COMPAT_UTS_MACHINE, \
+                      sizeof(COMPAT_UTS_MACHINE)))
+#else
+#define override_architecture(name)     0
+#endif
+
 SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
 {
         int errno = 0;
@@ -1122,6 +1132,9 @@ SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
         if (copy_to_user(name, utsname(), sizeof *name))
                 errno = -EFAULT;
         up_read(&uts_sem);
+
+        if (!errno && override_architecture(name))
+                errno = -EFAULT;
         return errno;
 }