From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEF68606ABA3 for ; Mon, 2 Nov 2026 16:21:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=R/+S+vKr; dkim=pass (2048-bit key, unprotected) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=Bkvlc9Uh; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=no3DkXB1 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=CAbnxO0/qUW9BHgq0s5afN/fwZolzjrBJaRnSuaEmAo=; b=R/+S+vKrwrxOF2un5NCfVYj0Cl 8/DT390HYWkTj9A75PDc/pYAKIiVP260snHC12Y0jwHjc024XXluFMh1senLis4mLWmrFGLEgtAjP 83SghMO0Zn3V9FyKB7tqgB9PltYI7xk0hAuuaCNLXH0LxM/ssqazbSTyIGcWrJTd0CuEzh2aGVSth ynCDDlyxPwbhoWGhia4YYvqPfw90LdSVR1PNILgnKbarnbcwqikM7vqx8UPekSvfzmGqCXNcz4cWI FmtAr6gFvr26lP03TK5SInjZM3ccD0VdT4fgEadg2WSNewBnj91+w13k6L7JpX2Z88z7zruZWhosy Ep2HZDaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNumk-0000000HHLe-36BF; Mon, 02 Nov 2026 16:21:26 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNumd-0000000HHKS-19IQ; Mon, 02 Nov 2026 16:21:20 +0000 Date: Mon, 2 Nov 2026 17:21:13 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1793636476; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=CAbnxO0/qUW9BHgq0s5afN/fwZolzjrBJaRnSuaEmAo=; b=Bkvlc9UhhyCv5ZdWUMU6G9Li+R2BVAADYWwZuoqUAyqvUjCoGYGxXIn4ALH8UCKwa4wXF8 oraU/gZ8eujvwMvYkEcPGl9LoaQ4y8L5gTwgvEqTaLIOKyYpw0Vt21vSoLNR9nGu5XUZGy Ei+jDbIPpRtvYxUN3n40OXfMZKwhjOcptRjzclaFhqfaMjZ4DnPJp2kIUEARXrDA2lfCj7 Xc9td9/O5azqjpJ09IA+6VHzOt3kgO7Q3tW3z+AQm8NXUA0NJY3SKFbPnSH3MoCGBJlCpq 9SKkxdgYMHfQI6T9cHJ58WWsIb3edmk7YJmf4hhOdiwEorZM3Pu5QhcHBVRk7Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1793636476; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=CAbnxO0/qUW9BHgq0s5afN/fwZolzjrBJaRnSuaEmAo=; b=no3DkXB1ZRbLOBdX8Sfg5H+HK/netv5lLDsnHm2NNe1d6SMQE1Lawcr4U1D9QbHBAGIkXh QAa36tqetUjJ21Dw== From: Sebastian Andrzej Siewior To: Thomas Gleixner Cc: "H. Peter Anvin" , LKML , Peter Zijlstra , Michael Ellerman , Shrikanth Hegde , linuxppc-dev@lists.ozlabs.org, Kees Cook , Huacai Chen , loongarch@lists.linux.dev, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Sven Schnelle , linux-s390@vger.kernel.org, x86@kernel.org, Mark Rutland , Jinjie Ruan , Andy Lutomirski , Oleg Nesterov , Richard Henderson , Russell King , Catalin Marinas , Guo Ren , Geert Uytterhoeven , Thomas Bogendoerfer , Helge Deller , Yoshinori Sato , Richard Weinberger , Chris Zankel , linux-arm-kernel@lists.infradead.org, linux-alpha@vger.kernel.org, linux-csky@vger.kernel.org, linux-m68k@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-um@lists.infradead.org, Arnd Bergmann , Vineet Gupta , Will Deacon , Brian Cain , Michal Simek , Dinh Nguyen , "David S. Miller" , Andreas Larsson , linux-snps-arc@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-openrisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, Michal =?utf-8?B?U3VjaMOhbmVr?= , Jonathan Corbet , linux-doc@vger.kernel.org Subject: Re: [PATCH V2] x86/entry: Fix ptrace regression Message-ID: <20261102162113.LEAhpzer@linutronix.de> References: <20261022142425.3Wx-RrU5@linutronix.de> <87fqxx1r80.ffs@fw13> <87cxt11ktr.ffs@fw13> <1149A39E-BEBA-46EA-94F4-4DFFC4733EF5@zytor.com> <871p9g1s3w.ffs@fw13> <87y0boze95.ffs@fw13> <87se1wyvs8.ffs@fw13> <87mrrvxaty.ffs@fw13> <87ecd4xwlr.ffs@fw13> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87ecd4xwlr.ffs@fw13> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261102_082119_484951_3F632EDA X-CRM114-Status: GOOD ( 10.63 ) X-Spam-Score: -4.4 (----) X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" X-Spam-Status: No, score=-15.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 2026-11-01 18:58:08 [+0100], Thomas Gleixner wrote: > --- a/arch/x86/entry/syscall_32.c > +++ b/arch/x86/entry/syscall_32.c > @@ -77,6 +77,10 @@ static __always_inline void do_syscall_3 > if (likely(nr < IA32_NR_syscalls)) { > nr = array_index_nospec(nr, IA32_NR_syscalls); > regs->ax = ia32_sys_call(regs, (unsigned int)nr); > + } else { > + /* See comment in do_syscall_64() */ > + if (nr != -1UL) { > + regs->ax = -ENOSYS; A curly closing bracket here and then it compiles for me. Or remove the one in the "if" line. > } > } With either of the suggested changes: Tested-by: Sebastian Andrzej Siewior Sebastian