From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A745BC54E58 for ; Fri, 15 Mar 2024 18:34:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rWdsEWAc0NwNtt+cGIjOcCvCYMhfYCdt/nYqG+knjq8=; b=fnZ1/0oOal+Vnu /PnbU4xrCQeP0lRG3jk5ATp4KNIFGLnNZJq1w/f4JAQ467RWj30piXuUSp44zGqBeUye0UnsFNDLT Upig/iQVwcqZTwl9ZU7BBNEwZdxG0CTdxQhLQTFDhzG4ESxHXbcUlx3BzzxFaRckVnlU2I+36UcVb 587Nd8DzWxfrKqxvwL0UxncV++mevbrxU6hSr9QRoVLpC22GFMdyqrkAzwj6P/S4kMc/M5h7U2Ahh dTg1u5C3LH09HOE2vGyTibqdQkBbIjHbI4gdUDJllEvPbWD+kTl8PWHIvq2lehzxgkrlhBahtBS/S WWWkOBC2jtoaLpwCNhJQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rlCO3-00000001BRb-0cCU; Fri, 15 Mar 2024 18:34:35 +0000 Received: from out-173.mta1.migadu.com ([95.215.58.173]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rlCNx-00000001BP5-47iv for linux-arm-kernel@lists.infradead.org; Fri, 15 Mar 2024 18:34:34 +0000 Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1710527660; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zwS8ifPQAGz1J3Hq6rVc1WHZcxma52yVomkFbeLKS2s=; b=vgG9rOHuxmCKaF8xIhfHf8fAEHOjraC0qZ2aRwEMFTxOuLTarOI2hdc5rm9lRh+ThmOmS6 FNZGtOkmKRgPXu5ZnDn9bnfwz+JD8qeISh2MQ8eFBpNzG8z2rnmJDKpMgznz+X7mS4/CU2 tW+s9N6w/ziM1+D788Trt2x/egeak68= Date: Fri, 15 Mar 2024 11:34:06 -0700 MIME-Version: 1.0 Subject: Re: [PATCH bpf-next v3 2/2] bpf: Check return from set_memory_rox() Content-Language: en-US To: Kui-Feng Lee Cc: bpf@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Kees Cook , Christophe Leroy , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Zi Shen Lim , Catalin Marinas , Will Deacon , "David S. 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From: Martin KaFai Lau In-Reply-To: <81492d37-47b2-4fca-ba2f-9528c2d41029@gmail.com> X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240315_113430_255242_90863F28 X-CRM114-Status: GOOD ( 14.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMy8xNS8yNCAxMToxMSBBTSwgS3VpLUZlbmcgTGVlIHdyb3RlOgo+PiAtLS0gYS9rZXJuZWwv YnBmL2JwZl9zdHJ1Y3Rfb3BzLmMKPj4gKysrIGIva2VybmVsL2JwZi9icGZfc3RydWN0X29wcy5j Cj4+IEBAIC03NDIsOCArNzQyLDExIEBAIHN0YXRpYyBsb25nIGJwZl9zdHJ1Y3Rfb3BzX21hcF91 cGRhdGVfZWxlbShzdHJ1Y3QgYnBmX21hcCAKPj4gKm1hcCwgdm9pZCAqa2V5LAo+PiDCoMKgwqDC oMKgwqDCoMKgwqAgaWYgKGVycikKPj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgZ290byBy ZXNldF91bmxvY2s7Cj4+IMKgwqDCoMKgwqAgfQo+PiAtwqDCoMKgIGZvciAoaSA9IDA7IGkgPCBz dF9tYXAtPmltYWdlX3BhZ2VzX2NudDsgaSsrKQo+PiAtwqDCoMKgwqDCoMKgwqAgYXJjaF9wcm90 ZWN0X2JwZl90cmFtcG9saW5lKHN0X21hcC0+aW1hZ2VfcGFnZXNbaV0sIFBBR0VfU0laRSk7Cj4+ ICvCoMKgwqAgZm9yIChpID0gMDsgaSA8IHN0X21hcC0+aW1hZ2VfcGFnZXNfY250ICYmICFlcnI7 IGkrKykKPj4gK8KgwqDCoMKgwqDCoMKgIGVyciA9IGFyY2hfcHJvdGVjdF9icGZfdHJhbXBvbGlu ZShzdF9tYXAtPmltYWdlX3BhZ2VzW2ldLCBQQUdFX1NJWkUpOwo+PiArCj4+ICvCoMKgwqAgaWYg KGVycikKPiAKPiBuaXQ6IENhbiBpdCBiZSBtb3JlIHNwZWNpZmljPyBJIG1lYW4gdG8gY2hlY2sg ZXJyIDwgMCwgc28gd2UgY2FuIHJlYXNvbgo+IHRoYXQgdGhpcyBmdW5jdGlvbiBuZXZlciByZXR1 cm5zIGEgcG9zaXRpdmUgdmFsdWUgb3RoZXIgdGhhbiAwLgoKSSB0aGluayAiaWYgKGVycikiIGlz IGZpbmUuIEl0IGlzIHByZXR0eSBjb21tb24gaW4gb3RoZXIgcGxhY2VzIG9mIHRoZSBrZXJuZWwu CgpDaGVja2luZyAiKGVyciA8IDApIiBtYXkgYWN0dWFsbHkgbWVhbiB0aGUgcmV0dXJuIHZhbHVl IGNvdWxkIGJlIHBvc2l0aXZlLiBBdCAKbGVhc3QgaXQgaXMgaG93IGJwZl9zdHJ1Y3Rfb3BzLmMg aXMgdXNpbmcgIihlcnIgPCAwKSIuCgpbIEFuIHVucmVsYXRlZCBzaWRlIG5vdGUgaXMgYW5vdGhl ciAoZXJyIDwgMCkgY2hlY2sgaW4gYnBmX3N0cnVjdF9vcHMuYyBjb3VsZCAKaGF2ZSBiZWVuIGNo YW5nZWQgYWZ0ZXIgdGhlIHJlY2VudCBjaGFuZ2VzIGluIGJwZl9zdHJ1Y3Rfb3BzX3ByZXBhcmVf dHJhbXBvbGluZSAKd2hpY2ggbm8gbG9uZ2VyIHJldHVybiArdmFsIF0uCgoKCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFp bGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlz dHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK