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[209.132.180.67]) by mx.google.com with ESMTP id g28-v6si14454218plj.307.2018.06.17.07.05.40; Sun, 17 Jun 2018 07:05:54 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754339AbeFQOD7 (ORCPT + 99 others); Sun, 17 Jun 2018 10:03:59 -0400 Received: from mout.gmx.net ([212.227.15.19]:50873 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754082AbeFQOD5 (ORCPT ); Sun, 17 Jun 2018 10:03:57 -0400 Received: from homer.simpson.net ([188.174.240.203]) by mail.gmx.com (mrgmx001 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MWTfu-1fjIwJ0yAU-00XcWO; Sun, 17 Jun 2018 16:03:01 +0200 Message-ID: <1529244178.4674.1.camel@gmx.de> Subject: Re: [tip:x86/pti] x86/asm: Pad assembly functions with INT3 instructions From: Mike Galbraith To: Borislav Petkov Cc: Alexey Dobriyan , torvalds@linux-foundation.org, tglx@linutronix.de, mingo@kernel.org, jpoimboe@redhat.com, luto@kernel.org, peterz@infradead.org, brgerst@gmail.com, hpa@zytor.com, linux-kernel@vger.kernel.org, dvlasenk@redhat.com, h.peter.anvin@intel.com, linux-tip-commits Date: Sun, 17 Jun 2018 16:02:58 +0200 In-Reply-To: <1529242717.4472.3.camel@gmx.de> References: <20180507213755.GA32406@avx2> <1529235613.4572.7.camel@gmx.de> <20180617120012.GB16877@zn.tnic> <1529242717.4472.3.camel@gmx.de> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:jkaTpEn97dNo335C7zTWkTIclQ3eqP46kuaf+xi4tZ8SFVX2u88 Yd8EMvRgGFIkDBGWr8YmDyIjpejIcGcRy2oiir+JOmYVU9jJOaJBfKog6aJHNqvcpkv/KiF rX7v9cEzLZGkqkZ4/QEYzcj3zC4JqvHTCp7R0W1LOTRVuhoEb7lv8EbJ7cThup8wvxcxgeZ GDQIiMIrsfqVN8vKaWG6w== X-UI-Out-Filterresults: notjunk:1;V01:K0:vR3tMdBYsHo=:PIiuJNbKneyo3TxaajUf2o dWguheJeQ+nvaJLBBvjfk4wgx8CPxHC9NVkyuLPaBK4MPQ4cRwIZMpAtE7nNf6dxB8RcoU0ml x0A6NTTzhR8kLsAnZLUJNopgT1EwSI+Y1fSt83gkhRTxuMcREUePVvVrS2xqqZyUOGb8+qiB1 /qF71szbq/VP8PKKfA+Xv4Fjdq6EnaOhUjJ3nsiJY2ZPYt1KP8/C5BTPjqchRj51UB2o8P3Q9 Gq83evq3ajp4zG7X6rHFpJEeRNMwqftQpzmzIOhn+BwW6j6JVDz7xru6mDHjT1AgLe/XbEWtg H18OFUcI1gHr/piQk54P1gUa8DrQT2NK2do6jkHElUYmzkp80MBSBnvj8FVZ0ekVHu/rQTbnM IA3HiYd4i2pcH797ioT4+wm8xEAMGPVXqgDoC0WawMS9eLLhB7H+dvewgGdEN8UaLjLqjmpiv 1OkfldNPCYleD4g5MgXa/Otqn6AIr8mJ4R4d01M2pGTX497Hxivww6WJkKHLnbYOR7P4CZ39/ fw2WFEwT7QpFI4zsIHnFc8qquShxX4FDaTQ8Tmho+QixKDfhJoR5V0BQUzNkyYMCpZayVKb+i JrdvDkYVZnZM1e7LgVFUPWHiOj6suwz/s8wtHaJJetvm7EMJhQ+Q2kSzaHAg0P0EeT6GalmJ9 RCIzUftiHjV72KEzLjlp16n9a1XkSei3KUqQHnOnLNVUDpApgkqOJVGtiVhB0tsMqVcTJh5Tl 4TorB/dWyadq76fcr2RaScxh81692NE6PmIeh6epsIArLoAclHXan0xqE95uK6LakZcZux7OQ VhCqnFO Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2018-06-17 at 15:38 +0200, Mike Galbraith wrote: > On Sun, 2018-06-17 at 14:00 +0200, Borislav Petkov wrote: > > On Sun, Jun 17, 2018 at 01:40:13PM +0200, Mike Galbraith wrote: > > > On Mon, 2018-05-14 at 05:53 -0700, tip-bot for Alexey Dobriyan wrote: > > > > Commit-ID: 51bad67ffbce0aaa44579f84ef5d05597054ec6a > > > > Gitweb: https://git.kernel.org/tip/51bad67ffbce0aaa44579f84ef5d05597054ec6a > > > > Author: Alexey Dobriyan > > > > AuthorDate: Tue, 8 May 2018 00:37:55 +0300 > > > > Committer: Ingo Molnar > > > > CommitDate: Mon, 14 May 2018 11:43:03 +0200 > > > > > > > > x86/asm: Pad assembly functions with INT3 instructions > > > > > > > > Use INT3 instead of NOP. All that padding between functions is > > > > an illegal area, no legitimate code should jump into it. > > > > > > Is dinky patchlet suggesting cryptomgr is being naughty? > > > > > > (revert silences spew, but..) > > > > > > ... > > > [ 21.041608] int3: 0000 [#1] SMP PTI > > > [ 21.041754] CPU: 3 PID: 935 Comm: cryptomgr_test Tainted: G E 4.17.0.g075a1d3-tip-default #146 > > > [ 21.041888] Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.20C 09/23/2013 > > > [ 21.042035] RIP: 0010:crypto_aegis128_aesni_enc_tail+0x74/0x80 [aegis128_aesni] > > > [ 21.042171] Code: 38 dc ca 66 0f 38 dc d3 66 0f 38 dc de 66 0f ef e5 f3 0f 7f 27 f3 0f 7f 47 10 f3 0f 7f 4f 20 f3 0f 7f 57 30 f3 0f 7f 5f 40 cc cc cc cc cc cc cc cc cc cc cc cc 48 83 fe 10 0f 82 c3 03 00 00 > > > > Looks like it misses a RET: > > Bingo. > > [ 28.751069] RIP: 0010:crypto_aegis128l_aesni_enc_tail+0xcd/0xd0 [aegis128l_aesni] > > Next next next.. (/me does that.. all better) From 6ac281ee69f4cb5b581d5f49662fb56b6326155a Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Sun, 17 Jun 2018 13:57:42 +0200 Subject: [PATCH] x86/crypto: Add a missing RET crypto_aegis128_aesni_enc_tail() needs to return too. Signed-off-by: Borislav Petkov --- arch/x86/crypto/aegis128-aesni-asm.S | 1 + arch/x86/crypto/aegis128l-aesni-asm.S | 1 + arch/x86/crypto/aegis256-aesni-asm.S | 1 + arch/x86/crypto/morus1280-avx2-asm.S | 1 + arch/x86/crypto/morus1280-sse2-asm.S | 1 + arch/x86/crypto/morus640-sse2-asm.S | 1 + 6 files changed, 6 insertions(+) --- a/arch/x86/crypto/aegis128-aesni-asm.S +++ b/arch/x86/crypto/aegis128-aesni-asm.S @@ -535,6 +535,7 @@ ENTRY(crypto_aegis128_aesni_enc_tail) movdqu STATE3, 0x40(STATEP) FRAME_END + ret ENDPROC(crypto_aegis128_aesni_enc_tail) .macro decrypt_block a s0 s1 s2 s3 s4 i --- a/arch/x86/crypto/aegis128l-aesni-asm.S +++ b/arch/x86/crypto/aegis128l-aesni-asm.S @@ -645,6 +645,7 @@ ENTRY(crypto_aegis128l_aesni_enc_tail) state_store0 FRAME_END + ret ENDPROC(crypto_aegis128l_aesni_enc_tail) /* --- a/arch/x86/crypto/aegis256-aesni-asm.S +++ b/arch/x86/crypto/aegis256-aesni-asm.S @@ -543,6 +543,7 @@ ENTRY(crypto_aegis256_aesni_enc_tail) state_store0 FRAME_END + ret ENDPROC(crypto_aegis256_aesni_enc_tail) /* --- a/arch/x86/crypto/morus1280-avx2-asm.S +++ b/arch/x86/crypto/morus1280-avx2-asm.S @@ -453,6 +453,7 @@ ENTRY(crypto_morus1280_avx2_enc_tail) vmovdqu STATE4, (4 * 32)(%rdi) FRAME_END + ret ENDPROC(crypto_morus1280_avx2_enc_tail) /* --- a/arch/x86/crypto/morus1280-sse2-asm.S +++ b/arch/x86/crypto/morus1280-sse2-asm.S @@ -652,6 +652,7 @@ ENTRY(crypto_morus1280_sse2_enc_tail) movdqu STATE4_HI, (9 * 16)(%rdi) FRAME_END + ret ENDPROC(crypto_morus1280_sse2_enc_tail) /* --- a/arch/x86/crypto/morus640-sse2-asm.S +++ b/arch/x86/crypto/morus640-sse2-asm.S @@ -437,6 +437,7 @@ ENTRY(crypto_morus640_sse2_enc_tail) movdqu STATE4, (4 * 16)(%rdi) FRAME_END + ret ENDPROC(crypto_morus640_sse2_enc_tail) /*