1 files changed, 5 insertions, 0 deletions

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index c46e3d48e410..e15e1489aef5 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -357,11 +357,16 @@ asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned
 
 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 {
+        compat_ino_t ino;
         int err;
 
         if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
                 return -EOVERFLOW;
 
+        ino = stat->ino;
+        if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
+                return -EOVERFLOW;
+
         err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
         err |= put_user(stat->ino, &statbuf->st_ino);
         err |= put_user(stat->mode, &statbuf->st_mode);