X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fldt.c;h=0a8e65e7594467917d2429e96635bc01540b78f4;hp=ea697263b3738d2b20ef1131cb28ff8be44aa021;hb=70d87cbbd92a3611655b39003176ee1033796bf7;hpb=d3b383338f105f50724c10a7d81b04a3930e886b

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index ea697263b373..0a8e65e75944 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -230,6 +230,11 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 		}
 	}
 
+	if (!IS_ENABLED(CONFIG_X86_16BIT) && !ldt_info.seg_32bit) {
+		error = -EINVAL;
+		goto out_unlock;
+	}
+
 	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;