Received: by 2002:a05:6a10:6006:0:0:0:0 with SMTP id w6csp128497pxa; Wed, 26 Aug 2020 06:38:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwSl1l6037do7jJudQ0MlqSo2h5SPwURcMIY+rrwR3IHbZJfOF4ooT3nxbIxWNR6RNUrg10 X-Received: by 2002:a17:907:40bf:: with SMTP id nu23mr12850006ejb.47.1598449115632; Wed, 26 Aug 2020 06:38:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1598449115; cv=none; d=google.com; s=arc-20160816; b=GvJP1jdfUAr9KC6OOm/dwFRlm4BS4/J9OtbTMGpjewGsHpAUJSaEXPSHxHoL4N3Cgc oKscyEJHnO1g/KdwF0HOFrb/uANizg1FyxAL3CySFPtgVYbH8YqOyMp4+XwDeX2PHRdh yQ+4feryNjpmjvaEkwHAg2YezyPnU10osImgZfd2QgUMeNxl4SpGx5i4jLjj7SylVryA CpMEYhTF3r9tOAylFyAJ7gCzVtzFt5mP+AbdvQL6t9yGCILALvG/bNTXMNJHzGgi/+qn 26uilROfwwOVgpfup9V+UNjLY7PlIBDpGSQxEPt9oKRWNxbxinKqzbG/iRVZ+MICQHJM Z7bQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:subject:cc:to:from:dkim-signature; bh=iYIjbYEYGA3B8E0jHN+Y9hP2pOhtMVuT4KRsfVpsWtM=; b=xhE/Nhpl8emCntUYPiZuwsrJHo6XjcFx6ivUIhyzavn4aWYk0cExa9lNuyH5xWXVn1 P91G4ZV+NHJUCMbLi5UX+pCg8dAN3RSng1Uoc78vtDAernCaNzvpaE/scbrSgpvo20J7 HkIJgI95n3gTM8Ajmy2U14OPeqR2+CvHwu6y0/x52W14F1WWbPAerO+BdcYGL6eyClGf RsuPzAS/pn12vOjNgeUFXX16yZFuekp1fz55YlPnrmYzTB7xUT90Xc71c+aAt8lYOIGt dUrcICSlxg9EvvlOiZVTevo/cEco9+oYS3XUIt+VJmUsIcxDKhWADM5c8EmBWuxyOxEf Z+uQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@trendmicro.com header.s=tmoutbound header.b="iw+c4pu/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=trendmicro.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id cc8si1705546edb.204.2020.08.26.06.38.11; Wed, 26 Aug 2020 06:38:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@trendmicro.com header.s=tmoutbound header.b="iw+c4pu/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=trendmicro.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730238AbgHZNgf (ORCPT + 99 others); Wed, 26 Aug 2020 09:36:35 -0400 Received: from sjdcvmout02.udc.trendmicro.com ([66.180.82.11]:34316 "EHLO sjdcvmout02.udc.trendmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730217AbgHZNge (ORCPT ); Wed, 26 Aug 2020 09:36:34 -0400 Received: from sjdcvmout02.udc.trendmicro.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A807264142; Wed, 26 Aug 2020 06:36:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=trendmicro.com; s=tmoutbound; t=1598448992; bh=iYIjbYEYGA3B8E0jHN+Y9hP2pOhtMVuT4KRsfVpsWtM=; h=From:To:Date; b=iw+c4pu/8HC6zlKcotKp7oqdvd1aZdrsTIEtH8M9xtlo1NtDn7N2NYRru5P83IVi0 PWm/YUTcFHJBWkTiMbAnuPgYS3yuYTjLryVWoTms8J2cjlzcHeNGY1bl4pd54cnD5G ahWMofyDYd9jK/SPldIM+r1kilc+9dQDdXxFgz+c= Received: from sjdcvmout02.udc.trendmicro.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9A6D5640F7; Wed, 26 Aug 2020 06:36:32 -0700 (PDT) Received: from SJDC-EXNABU01.us.trendnet.org (unknown [10.45.175.97]) by sjdcvmout02.udc.trendmicro.com (Postfix) with ESMTPS; Wed, 26 Aug 2020 06:36:32 -0700 (PDT) Received: from ADC-EXAPAC12.tw.trendnet.org (10.28.2.229) by SJDC-EXNABU01.us.trendnet.org (10.45.175.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 26 Aug 2020 06:36:28 -0700 Received: from ADC-EXAPAC11.tw.trendnet.org (10.28.2.228) by ADC-EXAPAC12.tw.trendnet.org (10.28.2.229) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 26 Aug 2020 13:36:15 +0000 Received: from ADC-EXAPAC11.tw.trendnet.org ([fe80::e9de:ebb1:bcf0:5913]) by ADC-EXAPAC11.tw.trendnet.org ([fe80::e9de:ebb1:bcf0:5913%18]) with mapi id 15.01.1979.003; Wed, 26 Aug 2020 13:36:15 +0000 From: "Eddy_Wu@trendmicro.com" To: "peterz@infradead.org" CC: "mhiramat@kernel.org" , "linux-kernel@vger.kernel.org" , "x86@kernel.org" Subject: RE: x86/kprobes: kretprobe fails to triggered if kprobe at function entry is not optimized (trigger by int3 breakpoint) Thread-Topic: x86/kprobes: kretprobe fails to triggered if kprobe at function entry is not optimized (trigger by int3 breakpoint) Thread-Index: AdZ5/y9ucVi7Kf0NSwa8vnc6Q/ol0wAL6hEAAAENaQAAHQZRAAAMWPyAACXNoJAABJOdgAABikmAAAHiM4AAAOAdgAACKGhg Date: Wed, 26 Aug 2020 13:36:15 +0000 Message-ID: <42c65d9e434945c183ead8bef3d89de2@trendmicro.com> References: <8816bdbbc55c4d2397e0b02aad2825d3@trendmicro.com> <20200825005426.f592075d13be740cb3c9aa77@kernel.org> <7396e7b2079644a6aafd9670a111232b@trendmicro.com> <20200825151538.f856d701a34f4e0561a64932@kernel.org> <20200825120911.GX1362448@hirez.programming.kicks-ass.net> <20200826172239.ff175be78ee5f3a4380579c3@kernel.org> <20200826180645.9b609fc05df2a149564df1b8@kernel.org> <20200826190041.2d0ff0fbe154ba62163b0c00@kernel.org> <20200826102545.GF1362448@hirez.programming.kicks-ass.net> In-Reply-To: <20200826102545.GF1362448@hirez.programming.kicks-ass.net> Accept-Language: zh-TW, en-US Content-Language: zh-TW X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.28.4.6] X-TM-AS-Product-Ver: IMSVA-9.1.0.1960-8.6.0.1013-25626.007 X-TM-AS-Result: No--29.835-5.0-31-10 X-TMASE-MatchedRID: Nu4omozL6aLUL3YCMmnG4vHkpkyUphL9Ud7Bjfo+5jRd964B0EJ1lSio vVyGVXbFKmeI7ghTOjcXjjynQV89QI3sS3MVuiP/X1J8nCIowYDdXhRKGhNdp+jnKWtZ9LTLoML A09Q7YQVlfORP6fQwh1E3gGKuv1qSGcUcwv8O6FRFM72aEhcbjUzzNX6FuGYD5wA4LRxAiq/v8k ZFnw+AJ30h0t4LRJU4RwWmLxdIcSgXgBGQGIGL/vRUId35VCIeB5sxzt03wPgUZ5IS2TgivZlZS zHeHjGRunnGSiVNIJ9aHQACyuJADmNz5op/462xlxI7MMLiequsxB8h8Z7XRha1b8SJLTWfqCgi pHiRLo7ejnZr6Lh3iyGqq99jJVWlQo+W44QpPf83X0+M8lqGUmru/VhgywnpDO+DX+rUwfZYerV ulKHl4guUBPzAgA1JZwwPubhdqok4LhgP3hW5wO9VsdrlGzy3mHAp2UJ8+TybKItl61J/yfmS+a Pr0Ve8WhMF7hZwoTHkwjHXXC/4I+JGF26G8SWy5yM0c1ktj9M= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--29.835300-10.000000 X-TMASE-Version: IMSVA-9.1.0.1960-8.6.1013-25626.007 Content-Type: text/plain; charset="big5" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-TM-SNTS-SMTP: B3A37DDF16EDA88C1F8E1A494924CC34B1826E36B5548708DA01140964237D092000:8 X-TM-AS-GCONF: 00 X-imss-scan-details: No--29.835-5.0-31-10 X-TMASE-SNAP-Result: 1.821001.0001-0-1-12:0,22:0,33:0,34:0-0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogcGV0ZXJ6QGluZnJhZGVh ZC5vcmcgPHBldGVyekBpbmZyYWRlYWQub3JnPg0KPiBTZW50OiBXZWRuZXNkYXksIEF1Z3VzdCAy NiwgMjAyMCA2OjI2IFBNDQo+IFRvOiBNYXNhbWkgSGlyYW1hdHN1IDxtaGlyYW1hdEBrZXJuZWwu b3JnPg0KPiBDYzogRWRkeSBXdSAoUkQtVFcpIDxFZGR5X1d1QHRyZW5kbWljcm8uY29tPjsgbGlu dXgta2VybmVsQHZnZXIua2VybmVsLm9yZzsgeDg2QGtlcm5lbC5vcmcNCj4gU3ViamVjdDogUmU6 IHg4Ni9rcHJvYmVzOiBrcmV0cHJvYmUgZmFpbHMgdG8gdHJpZ2dlcmVkIGlmIGtwcm9iZSBhdCBm dW5jdGlvbiBlbnRyeSBpcyBub3Qgb3B0aW1pemVkICh0cmlnZ2VyIGJ5IGludDMgYnJlYWtwb2lu dCkNCj4NCj4gT24gV2VkLCBBdWcgMjYsIDIwMjAgYXQgMDc6MDA6NDFQTSArMDkwMCwgTWFzYW1p IEhpcmFtYXRzdSB3cm90ZToNCj4gPiBPZiBjb3Vyc2UsIHRoaXMgZG9lc24ndCBzb2x2ZSB0aGUg bGxpc3RfZGVsX2ZpcnN0KCkgY29udGVudGlvbiBpbiB0aGUNCj4gPiBwcmVfa3JldHByb2JlX2hh bmRsZXIoKS4gU28gYW55d2F5IHdlIG5lZWQgYSBsb2NrIGZvciBwZXItcHJvYmUgbGxpc3QNCj4g PiAoaWYgSSB1bmRlcnN0YW5kIGxsaXN0LmggY29tbWVudCBjb3JyZWN0bHkuKQ0KPg0KPiBCYWgs IGxlbW1lIHRoaW5rIGFib3V0IHRoYXQuIEtwcm9iZXMgcmVhbGx5IHNob3VsZG4ndCBiZSB1c2lu ZyBsb2NrcyA6Lw0KDQpNYXliZSB3ZSBjYW4gaGF2ZSBwZXItY3B1IGZyZWUgbGlzdCBmb3IgcmV0 cHJvYmVfaW5zdGFuY2U/DQpUaGlzIGVuc3VyZSB3ZSBvbmx5IGhhdmUgb25lIHVzZXIgcmVxdWVz dGluZyBmcmVlIGluc3RhbmNlIGF0IGEgdGltZSwgZ2l2ZW4gdGhhdCBwcmVfa3JldHByb2JlX2hh bmRsZXIoKSB3b250IHJlY3Vyc2l2ZS4NCg0KV2UgbWF5IGJlIHdhc3RpbmcgbWVtb3J5IGlmIHRh cmdldCBmdW5jdGlvbiBwZXJmZXIgc29tZSBjcHUgdGhvdWdoLg0KDQoNClRSRU5EIE1JQ1JPIEVN QUlMIE5PVElDRQ0KDQpUaGUgaW5mb3JtYXRpb24gY29udGFpbmVkIGluIHRoaXMgZW1haWwgYW5k IGFueSBhdHRhY2htZW50cyBpcyBjb25maWRlbnRpYWwgYW5kIG1heSBiZSBzdWJqZWN0IHRvIGNv cHlyaWdodCBvciBvdGhlciBpbnRlbGxlY3R1YWwgcHJvcGVydHkgcHJvdGVjdGlvbi4gSWYgeW91 IGFyZSBub3QgdGhlIGludGVuZGVkIHJlY2lwaWVudCwgeW91IGFyZSBub3QgYXV0aG9yaXplZCB0 byB1c2Ugb3IgZGlzY2xvc2UgdGhpcyBpbmZvcm1hdGlvbiwgYW5kIHdlIHJlcXVlc3QgdGhhdCB5 b3Ugbm90aWZ5IHVzIGJ5IHJlcGx5IG1haWwgb3IgdGVsZXBob25lIGFuZCBkZWxldGUgdGhlIG9y aWdpbmFsIG1lc3NhZ2UgZnJvbSB5b3VyIG1haWwgc3lzdGVtLg0KDQpGb3IgZGV0YWlscyBhYm91 dCB3aGF0IHBlcnNvbmFsIGluZm9ybWF0aW9uIHdlIGNvbGxlY3QgYW5kIHdoeSwgcGxlYXNlIHNl ZSBvdXIgUHJpdmFjeSBOb3RpY2Ugb24gb3VyIHdlYnNpdGUgYXQ6IFJlYWQgcHJpdmFjeSBwb2xp Y3k8aHR0cDovL3d3dy50cmVuZG1pY3JvLmNvbS9wcml2YWN5Pg0K