Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752086AbaAONwY (ORCPT ); Wed, 15 Jan 2014 08:52:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:22252 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752011AbaAONwT (ORCPT ); Wed, 15 Jan 2014 08:52:19 -0500 From: Mateusz Guzik To: linux-kernel@vger.kernel.org Cc: Gabriellla Schmidt , Al Viro Subject: [PATCH] ipc: fix compat msgrcv with negative msgtyp Date: Wed, 15 Jan 2014 14:52:12 +0100 Message-Id: <1389793932-7549-1-git-send-email-mguzik@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Compat function takes msgtyp argument as u32 and passes it down to do_msgrcv which results in casting to long, thus the sign is lost and we get a big positive number instead. Cast the argument to signed type before passing it down. Signed-off-by: Mateusz Guzik Reported-by: Gabriellla Schmidt Cc: Al Viro --- ipc/compat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ipc/compat.c b/ipc/compat.c index 892f658..d3b3760 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -381,7 +381,7 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, uptr = compat_ptr(ipck.msgp); fifth = ipck.msgtyp; } - return do_msgrcv(first, uptr, second, fifth, third, + return do_msgrcv(first, uptr, second, (s32)fifth, third, compat_do_msg_fill); } case MSGGET: -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/