From nobody Tue Feb 10 03:39:43 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1770070206047979.6105562566958; Mon, 2 Feb 2026 14:10:06 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vn25n-0004mw-HS; Mon, 02 Feb 2026 17:08:23 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vn25i-0004m4-5R; Mon, 02 Feb 2026 17:08:18 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vn25g-0002YB-BY; Mon, 02 Feb 2026 17:08:17 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 9F4801852AE; Tue, 03 Feb 2026 01:07:31 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 7C8F635B3C1; Tue, 03 Feb 2026 01:08:13 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Andrew Cooper , Paolo Bonzini , Michael Tokarev Subject: [Stable-10.2.1 01/56] target/i386: Fix #GP error code for INT instructions Date: Tue, 3 Feb 2026 01:07:06 +0300 Message-ID: <20260202220805.945271-1-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1770070208081158500 Content-Type: text/plain; charset="utf-8" From: Andrew Cooper While the (intno << shift) expression is correct for indexing the IDT based= on whether Long Mode is active, the error code itself was unchanged with AMD64, and is still the index with 3 bits of metadata in the bottom. Found when running a Xen unit test, all under QEMU. The unit test objected= to being told there was an error with IDT index 256 when INT $0x80 (128) was t= he problem instruction: ... Error: Unexpected fault 0x800d0802, #GP[IDT[256]] ... Fixes: d2fd1af76777 ("x86_64 linux user emulation") Signed-off-by: Andrew Cooper Link: https://lore.kernel.org/r/20250312000603.3666083-1-andrew.cooper3@cit= rix.com Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3160 Signed-off-by: Paolo Bonzini (cherry picked from commit 60efba3c1bff0d78632d45c2dc927c5bc7a17ba8) Signed-off-by: Michael Tokarev diff --git a/target/i386/tcg/user/seg_helper.c b/target/i386/tcg/user/seg_h= elper.c index 263f59937f..28bbef1bba 100644 --- a/target/i386/tcg/user/seg_helper.c +++ b/target/i386/tcg/user/seg_helper.c @@ -63,7 +63,7 @@ static void do_interrupt_user(CPUX86State *env, int intno= , int is_int, cpl =3D env->hflags & HF_CPL_MASK; /* check privilege if software int */ if (dpl < cpl) { - raise_exception_err(env, EXCP0D_GPF, (intno << shift) + 2); + raise_exception_err(env, EXCP0D_GPF, intno * 8 + 2); } } =20 --=20 2.47.3