From patchwork Fri Nov 25 12:29:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Sun X-Patchwork-Id: 25975 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp3981763wrr; Fri, 25 Nov 2022 04:35:29 -0800 (PST) X-Google-Smtp-Source: AA0mqf4lWxmq42Z/FtQdu4PCojzSHH7BPW5RZCiVAAPShU0ahlA+xM8fWdV1tYUgSws8CxwUhcch X-Received: by 2002:a63:5747:0:b0:46f:cbcb:761a with SMTP id h7-20020a635747000000b0046fcbcb761amr15913006pgm.82.1669379729546; Fri, 25 Nov 2022 04:35:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669379729; cv=none; d=google.com; s=arc-20160816; b=jbIbAaT4ue0HMuywNXnR0E0kBx4R9ZLdqa+uWUQ6tRb7ikx39yrTqHdxGgeoNfCwdV y6126lsYA6TcEYZ6pnYt2kfumbh8jyD0wxUNyso0BceCpuDF2H8k0ks2UXTptV0bN556 4fkuoWgo7P99DAbTFji0JwFdoUOtBHAx0fkM5ghdMvEZZs8hBbwb5SFs8gt1XIS3U7Z3 +d14BP5bZrDI0gorkbgnTZzP7Upti2+ZANMdVoyS1ipHHVKilUESte7nubVz4Oy4aNq1 JaBkMsAPcUX62Xwg56s4FPWhEixbk9HpZtuq643so58pBbIdZd8Tu1rwpfxPe8XwuBNa uJdg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=7xh9LbtZzqm4dkobqZjAtGb2NHj8Qkn7BN/d8Dnlu+8=; b=Is+X7Z6pjwXZ+4qu4S3lTYTAFrz9pUZVyIUPMrp0uPF47hOVmYjNCKOiV+HrvVkjUe 0H5Pi2C68jT1JKSFiCz0UZ0MMUGroTHQEDikE113K6poClCPvJQLx1yJCbw3nzEqF60k pVhGC6/qo41U6ZwmhhCGPg/tZfmfrlgCzEzMtlIuerNlllvDlmCJMBU+iR/0b9p55Qn/ tfFwNZAGdxlO/tWkHOX47VJxTc1IvS8lTtamcOd4nEaor8kbD11MtnHRcvv2IT8tX1VI pqmCzBwR5mx1pOaxgK4sNw42tUuZfokMMI5UvMKbZKZJF2PRi+p9hiOOnqLEBbzdXKx4 k6Hg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=BogLWBOf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id k3-20020a654643000000b0047693f2ef8esi4410107pgr.470.2022.11.25.04.35.16; Fri, 25 Nov 2022 04:35:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=BogLWBOf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229790AbiKYM3m (ORCPT + 99 others); Fri, 25 Nov 2022 07:29:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229681AbiKYM3h (ORCPT ); Fri, 25 Nov 2022 07:29:37 -0500 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 903CE4A5B0; Fri, 25 Nov 2022 04:29:36 -0800 (PST) Received: by mail-pl1-x62b.google.com with SMTP id w23so3854634ply.12; Fri, 25 Nov 2022 04:29:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7xh9LbtZzqm4dkobqZjAtGb2NHj8Qkn7BN/d8Dnlu+8=; b=BogLWBOfmrcP4qPaqILrhcroXBtG0tR+l9DpJGue32XeB3EKciXk/QuakkdtV33589 91HOrREnWQDErMiWy20/isCohmyRDBbXjfMvV0XDy7vv3b5z9DWtjRSCL1f0JMsY+MHD qWxSooxQPPCIp6L11tAlikcy+MfieG6QIymf15GDz/aSdxhfdtZZ8ewQYlwKMi1q7IaC IUT0/0rnSChMlFy0h9TwOZRy45IdNGXemXCKvzRolR038Fq83C6OY2OiGLvsY4vkJvfl 3hWkVCkTJvYaDjra+MaF1/++zgS1RmRNbgmYVh2Hh7r4EROmGuKxL9Url+Jj1nGGbeQO hhGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7xh9LbtZzqm4dkobqZjAtGb2NHj8Qkn7BN/d8Dnlu+8=; b=j0k/zuorYMSGYeAofE9dKxuhu1IJD7IN4VLcYuMoHgJrvLCNi0sl0MMZF78m/sxXBY E/ciep0AxYmyidmIqGy7blPsIymxicBn2CyiBkKwbYE6mwrucekqTTBq0C7leBsbkXSB /we5PhuFokHk/lTONviSJllLjp1iA84C+PZGsYzW/71+0lSDrLNz3FODkYXpIkUXiDGa /m1tUhLBA2l6rG3LICCwUaTw7Pp+SGTd6cG2rILnoWVsMexUEUltArNbcGCvX9FgHx6N y3yQ9kxIFw7HmqN7ZBsLtgmq5HGbQ1GXF5Q9XCGidzOoKI2ude/sZWOED5SKvcTrDNvm Jktw== X-Gm-Message-State: ANoB5pm5I7osrGg+iYC9dyF1VzPGqo8lTLt1tc1xHLhWCiSVR2omMRjR L5ImG/Nnr6sLJsW2nWr7zGTLbNFoUenQ X-Received: by 2002:a17:90b:3c42:b0:218:8186:ef9b with SMTP id pm2-20020a17090b3c4200b002188186ef9bmr37685657pjb.10.1669379375701; Fri, 25 Nov 2022 04:29:35 -0800 (PST) Received: from localhost.localdomain ([144.214.0.6]) by smtp.gmail.com with ESMTPSA id x14-20020a170902a38e00b0018912c37c8fsm117009pla.129.2022.11.25.04.29.32 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 25 Nov 2022 04:29:35 -0800 (PST) From: Hao Sun To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, davem@davemloft.net, linux-kernel@vger.kernel.org, Hao Sun Subject: [PATCH bpf-next v3 3/3] selftests/bpf: Add tests for LDX/STX/ST sanitize Date: Fri, 25 Nov 2022 20:29:12 +0800 Message-Id: <20221125122912.54709-4-sunhao.th@gmail.com> X-Mailer: git-send-email 2.37.1 (Apple Git-137.1) In-Reply-To: <20221125122912.54709-1-sunhao.th@gmail.com> References: <20221125122912.54709-1-sunhao.th@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,UPPERCASE_50_75 autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750471519359156703?= X-GMAIL-MSGID: =?utf-8?q?1750471519359156703?= Add tests for LDX/STX/ST instrumentation in each possible case. Five cases for STX/ST, nice cases for LDX. All new/existing selftests can pass. A slab-out-of-bounds read report is also availble, which is achieved by exploiting CVE-2022-23222 and can be reproduced in Linux v5.10: https://pastebin.com/raw/Ee1Cw492 Signed-off-by: Hao Sun --- .../selftests/bpf/verifier/sanitize_st_ldx.c | 317 ++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100644 tools/testing/selftests/bpf/verifier/sanitize_st_ldx.c diff --git a/tools/testing/selftests/bpf/verifier/sanitize_st_ldx.c b/tools/testing/selftests/bpf/verifier/sanitize_st_ldx.c new file mode 100644 index 000000000000..dfd53f97eb95 --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/sanitize_st_ldx.c @@ -0,0 +1,317 @@ +#ifdef CONFIG_BPF_PROG_KASAN + +#define __BACKUP_REG(n) \ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_##n, INSN_OFF_MASK) +#define BACKUP_SCRATCH_REGS \ + __BACKUP_REG(1), __BACKUP_REG(2), __BACKUP_REG(3), __BACKUP_REG(4), \ + __BACKUP_REG(5) + +#define __RESTORE_REG(n) \ + BPF_LDX_MEM(BPF_DW, BPF_REG_##n, BPF_REG_10, INSN_OFF_MASK) +#define RESTORE_SCRATCH_REGS \ + __RESTORE_REG(1), __RESTORE_REG(2), __RESTORE_REG(3), \ + __RESTORE_REG(4), __RESTORE_REG(5) + +{ + "sanitize stx: dst is R1, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 1), + }, +}, +{ + "sanitize stx: dst is R1", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_1, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_ST_MEM(BPF_DW, BPF_REG_1, -8, 1), + }, +}, +{ + "sanitize stx: dst is other regs, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 1), + }, +}, +{ + "sanitize stx: dst is other regs", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 1), + }, +}, +{ + "sanitize stx: dst is R10", + .insns = { + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .unexpected_insns = { + BPF_EMIT_CALL(INSN_IMM_MASK), + }, +}, +{ + "sanitize ldx: src is R1, dst is R0, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0), + }, +}, +{ + "sanitize ldx: src is R1, dst is R0", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_1, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, -8), + }, +}, +{ + "sanitize ldx: src is R1, dst is others, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0), + }, +}, +{ + "sanitize ldx: src is R1, dst is others", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_1, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, -8), + }, +}, +{ + "sanitize ldx: src is others, dst is R0, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 0), + }, +}, +{ + "sanitize ldx: src is others, dst is R0", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8), + }, +}, +{ + "sanitize ldx: src is others, dst is others, off is zero", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0), + }, +}, +{ + "sanitize ldx: src is others, dst is others", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .expected_insns = { + BACKUP_SCRATCH_REGS, + BPF_MOV64_REG(MAX_BPF_REG, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_EMIT_CALL(INSN_IMM_MASK), + RESTORE_SCRATCH_REGS, + BPF_MOV64_REG(BPF_REG_0, MAX_BPF_REG), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, -8), + }, +}, +{ + "sanitize LDX: SRC is R10", + .insns = { + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 1, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 1, + .unexpected_insns = { + BPF_EMIT_CALL(INSN_IMM_MASK), + }, +}, +#endif /* CONFIG_BPF_PROG_KASAN */