add argument check in mknod

[uclinux-h8/uClibc.git] / libc / sysdeps / linux / common / mknod.c

diff --git a/libc/sysdeps/linux/common/mknod.c b/libc/sysdeps/linux/common/mknod.c
index 416cab6..e0c54e6 100644 (file)
--- a/libc/sysdeps/linux/common/mknod.c
+++ b/libc/sysdeps/linux/common/mknod.c
@@ -24,6 +24,10 @@ int mknod(const char *path, mode_t mode, dev_t dev)
        /* We must convert the value to dev_t type used by the kernel.  */
        k_dev = (dev) & ((1ULL << 32) - 1);
 
+       if (k_dev != dev) {
+               __set_errno(EINVAL);
+               return -1;
+       }
        return INLINE_SYSCALL(mknod, 3, path, mode, (unsigned int)k_dev);
 }
 #endif