From nobody Fri Sep 5 20:16:50 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB74CC32772 for ; Tue, 23 Aug 2022 11:12:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357228AbiHWLMv (ORCPT ); Tue, 23 Aug 2022 07:12:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357491AbiHWLLG (ORCPT ); Tue, 23 Aug 2022 07:11:06 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A08F0B7EF6; Tue, 23 Aug 2022 02:17:33 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4FE3860F54; Tue, 23 Aug 2022 09:17:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36668C433C1; Tue, 23 Aug 2022 09:17:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1661246244; bh=7pMGTLfm7+yf402Et0WC41HMCYeZJIfscGaDIL9XAwM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=14naSlA/iCy0MwR8aVj7px/7mJ1JFIGcKveDImepEkIuMUDulyVXZWZpN6qvDSMnl QZm7kV8PkKesWqASe48SQAFaJ5AjRt+QFTPqerjyI06UgUWSIHVtqk6VRNEpbT4rMi 1iV5V/1gDG9rdbiLPoa7D6bBaX1zQcFnbTDnQM7Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Helge Deller Subject: [PATCH 5.4 030/389] parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode Date: Tue, 23 Aug 2022 10:21:48 +0200 Message-Id: <20220823080116.947594802@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220823080115.331990024@linuxfoundation.org> References: <20220823080115.331990024@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Helge Deller commit 6431e92fc827bdd2d28f79150d90415ba9ce0d21 upstream. For all syscalls in 32-bit compat mode on 64-bit kernels the upper 32-bits of the 64-bit registers are zeroed out, so a negative 32-bit signed value will show up as positive 64-bit signed value. This behaviour breaks the io_pgetevents_time64() syscall which expects signed 64-bit values for the "min_nr" and "nr" parameters. Fix this by switching to the compat_sys_io_pgetevents_time64() syscall, which uses "compat_long_t" types for those parameters. Cc: # v5.1+ Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- arch/parisc/kernel/syscalls/syscall.tbl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -413,7 +413,7 @@ 412 32 utimensat_time64 sys_utimensat sys_utimensat 413 32 pselect6_time64 sys_pselect6 compat_sys_pselect6_time64 414 32 ppoll_time64 sys_ppoll compat_sys_ppoll_time64 -416 32 io_pgetevents_time64 sys_io_pgetevents sys_io_pgetevents +416 32 io_pgetevents_time64 sys_io_pgetevents compat_sys_io_pgetevents_t= ime64 417 32 recvmmsg_time64 sys_recvmmsg compat_sys_recvmmsg_time64 418 32 mq_timedsend_time64 sys_mq_timedsend sys_mq_timedsend 419 32 mq_timedreceive_time64 sys_mq_timedreceive sys_mq_timedreceive