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([45.124.203.15]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c433078264sm149294725ad.65.2026.06.16.22.41.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Jun 2026 22:41:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1781674870; x=1782279670; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=Lp7xEj51Z44lN7tJkr0UCrWIcX0S3C7ow2fXXn9SBtw=; b=bvcWgiPv/EcCPDv2af9GlRDileMq+lWMUK7FRIi/eNhX+uvP654S0B3nYKJzPvChVy 7m5HRQQy7KdZK0newa9FAsHA6nDb7gTrd0jgjBPCe36+wkvomarPbHH+EBGz1IDD0elf EjICgTSVPrNN9vmbsdQGjRr3bw8nfu51SY95HvEX9IffGXu17o2pXTYGNvnL9n5bvX3j cKh6hyFADUXR5cJ30FLupFS2/6EtoVUidTfZZ17N5AbVHx9TIw338cxTuKe2PiYnlnOf 2mv9WAKpYwiahXfUSqvf9w0cbj63a0iH6H5qZnhDZj4HN2JXp6N11dp8Q621QyDar/Dv Gdpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781674870; x=1782279670; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Lp7xEj51Z44lN7tJkr0UCrWIcX0S3C7ow2fXXn9SBtw=; b=ghgIQid5D/S66Jx8doW4yPUR9AKeOzsLgtHbViRkiogSJRiNvRck+FsVliBJ6NK3n5 HhCW31I/vZWKryt6z3xz5kJdFfwvafiyZXAEWXPwiZ3qdazuXofYhnwQorOEj2pxCFjX cYe6n5OSj71AmagUX9SQbk0bPg0XJUBkipS0tKGyaNZZ509+5KoCKJQ4M6KKRaeXqGBq KH0XlyzmXLX5iX5lqHQYDnCwHPLkvqw20pdx08p/zLGI6scWU2kCnzia22o8LICtVvQG 0K7aI3IGEk0Vquh/MKCOggA3paRKyqyeEANfzBkpOmf5lbrSaCLxmQ1AgkvOa7wbSgos n72A== X-Forwarded-Encrypted: i=1; AFNElJ8zFeIGLJ2y9vDT9IQQhm8sUXNiiJmmSiPubFwooVHDwOoC91ErirCsBDWDUN7omvUmUY16OqxK3Aqr@nongnu.org X-Gm-Message-State: AOJu0Yz/QVHEnDggR3nL5yotixj5ZS5sMSfb6ZxtMtLks4YzOU/H5vkc ctxisZVhYsGkXASofJaLGSkvpzCStG/HDzVSJN/QyvoJ989rhuxQEHhW X-Gm-Gg: AfdE7ckA1NLX+4Jk16DRpsWooMLeobijXwjRZBfMoZ8zL7lHTQ2lJUQcZstXLxrfaVY 1zcljF3S3MvvDuZ/YDBQowxg5orj554nQ6kd8JgThHeVBVZmuUdACR+lJv8yo2z/PIvODR441MK UYsCYso7UoTY+faA8uJsKfgVsGCxSryYt5bSwQ6uY2ZUOFQaAdERzQMDjvpSLLqIHL8IjOJVN2L Jt5PvCkvYXaFAVRGTV00KSBPnUNFd7BrBv7U9jNuCDMjrdgO4PcvEKQKpYh+BdWQjsvQRHeeD/C cdhrYuUaBBbqWWX7WM2pMMdctMPELV7OgWpjP4QqRdHfHMHhlP6biVoNfYjm5RG7DNMIj8+IFgg AiQWJCslnxbjdx+dVoVpSAZ6z6ypbr70PLT/G6Al27rz6/F2FIqyZUzunMUzU1An1mdHM4NDPA4 rBw7MlcSHeUdVwPJrf94TNkpIVe5omiJRkLee7IfwpqupxEFj/52ffj4hT7wiSTL6QXXaESbkQG CHitQd51t4NsHl1YJlgrUFjjtbXBBYDDWPRHaEJaIs= X-Received: by 2002:a17:903:2411:b0:2c0:ca93:1303 with SMTP id d9443c01a7336-2c6bbf93604mr20397155ad.6.1781674869654; Tue, 16 Jun 2026 22:41:09 -0700 (PDT) From: Joel Stanley To: alistair.francis@wdc.com, Daniel Henrique Barboza , Anton Johansson Cc: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 1/3] target/riscv: Avoid NULL deref in IMSIC CSR write Date: Wed, 17 Jun 2026 15:09:26 +0930 Message-ID: <20260617054034.1020724-2-joel@jms.id.au> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260617054034.1020724-1-joel@jms.id.au> References: <20260617054034.1020724-1-joel@jms.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::633; envelope-from=joel.stan@gmail.com; helo=mail-pl1-x633.google.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1781674911001158500 Content-Type: text/plain; charset="utf-8" rmw_xireg_aia() and rmw_xtopei() were changed to store the IMSIC callback's value in a local before passing it back to the caller. For write only CSR accesses that pointer is NULL, causing a crash when guest programs write to xireg or xtopei, such as when the guest sets up the IMSIC. This only happens when setting aia=3Daplic-imsic so none of the existing boot tests caught it. Fix it by guarding the pointer dereference as done for other CSRs. Fixes: 63469ad75dcc ("target/riscv: Fix arguments to board IMSIC emulation = callbacks") Signed-off-by: Joel Stanley Reviewed-by: Alistair Francis Reviewed-by: Anton Johansson Reviewed-by: Daniel Henrique Barboza --- target/riscv/csr.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index ec931a8c3ddf..4502f2ab4788 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -2732,7 +2732,9 @@ static RISCVException rmw_xireg_aia(CPURISCVState *en= v, int csrno, AIA_MAKE_IREG(isel, priv, virt, vgein, riscv_cpu_mxl_bits(env)), &wide_val, new_val, wr_mask); - *val =3D wide_val; + if (val) { + *val =3D wide_val; + } } } else { isel_reserved =3D true; @@ -3008,7 +3010,9 @@ static RISCVException rmw_xtopei(CPURISCVState *env, = int csrno, AIA_MAKE_IREG(ISELECT_IMSIC_TOPEI, priv, virt, vgein, riscv_cpu_mxl_bits(env)), &wide_val, new_val, wr_mask); - *val =3D wide_val; + if (val) { + *val =3D wide_val; + } =20 done: if (ret) { --=20 2.47.3 From nobody Sun Jul 26 13:29:18 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1781674934742470.1859710276624; Tue, 16 Jun 2026 22:42:14 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wZj1Z-0007Kx-OD; Wed, 17 Jun 2026 01:41:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wZj1X-0007K6-E4 for qemu-devel@nongnu.org; Wed, 17 Jun 2026 01:41:15 -0400 Received: from mail-pl1-x62a.google.com ([2607:f8b0:4864:20::62a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wZj1V-0003vd-U5 for qemu-devel@nongnu.org; Wed, 17 Jun 2026 01:41:15 -0400 Received: by mail-pl1-x62a.google.com with SMTP id d9443c01a7336-2c6c57c5bcfso737275ad.1 for ; Tue, 16 Jun 2026 22:41:13 -0700 (PDT) Received: from donnager-debian.. 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Update it to a 6.11 kernel, the newest build on the tuxrun site. Boot times on a laptop are slightly longer but still reasonable: | v6.4.16 | v6.11.9 ---------------------|---------|-------- test_riscv64 | 4.82s | 5.56s ---------------------|---------|-------- test_riscv64_maxcpu | 4.94s | 5.30s Signed-off-by: Joel Stanley Reviewed-by: Alistair Francis Reviewed-by: Daniel Henrique Barboza --- tests/functional/riscv64/test_tuxrun.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/functional/riscv64/test_tuxrun.py b/tests/functional/ris= cv64/test_tuxrun.py index 0d8de36204a3..43d1242be52b 100755 --- a/tests/functional/riscv64/test_tuxrun.py +++ b/tests/functional/riscv64/test_tuxrun.py @@ -17,8 +17,8 @@ class TuxRunRiscV64Test(TuxRunBaselineTest): =20 ASSET_RISCV64_KERNEL =3D Asset( - 'https://storage.tuxboot.com/buildroot/20241119/riscv64/Image', - '2bd8132a3bf21570290042324fff48c987f42f2a00c08de979f43f0662ebadba') + 'https://storage.tuxboot.com/kernels/6.11.9/riscv64/Image', + '174f8bb87f08961e54fa3fcd954a8e31f4645f6d6af4dd43983d5e9841490fb0') ASSET_RISCV64_ROOTFS =3D Asset( 'https://storage.tuxboot.com/buildroot/20241119/riscv64/rootfs.ext= 4.zst', 'aa4736a9872651dfc0d95e709465eedf1134fd19d42b8cb305bfd776f9801004') --=20 2.47.3 From nobody Sun Jul 26 13:29:18 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1781674912702428.39526174238017; Tue, 16 Jun 2026 22:41:52 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wZj1d-0007MB-I0; Wed, 17 Jun 2026 01:41:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wZj1b-0007Le-OI for qemu-devel@nongnu.org; Wed, 17 Jun 2026 01:41:19 -0400 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wZj1a-0003wE-C9 for qemu-devel@nongnu.org; Wed, 17 Jun 2026 01:41:19 -0400 Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-2c0b9328c4aso39842245ad.0 for ; Tue, 16 Jun 2026 22:41:18 -0700 (PDT) Received: from donnager-debian.. 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With this the APLIC and IMSIC models are used by Linux, catching regressions. This test requires a kernel >=3D 6.10, as AIA drivers were added to Linux in 6.10. Boot time is ~5s on a laptop. Signed-off-by: Joel Stanley Reviewed-by: Alistair Francis Reviewed-by: Daniel Henrique Barboza --- tests/functional/riscv64/test_tuxrun.py | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tests/functional/riscv64/test_tuxrun.py b/tests/functional/ris= cv64/test_tuxrun.py index 43d1242be52b..6203a45060ce 100755 --- a/tests/functional/riscv64/test_tuxrun.py +++ b/tests/functional/riscv64/test_tuxrun.py @@ -41,6 +41,13 @@ def test_riscv64_maxcpu(self): self.common_tuxrun(kernel_asset=3Dself.ASSET_RISCV64_KERNEL, rootfs_asset=3Dself.ASSET_RISCV64_ROOTFS) =20 + def test_riscv64_aia(self): + self.set_machine('virt') + self.vm.set_machine('virt,aia=3Daplic-imsic') + self.cpu=3D'max' + self.common_tuxrun(kernel_asset=3Dself.ASSET_RISCV64_KERNEL, + rootfs_asset=3Dself.ASSET_RISCV64_ROOTFS) + def test_riscv64_rv32(self): self.set_machine('virt') self.cpu=3D'rv32' --=20 2.47.3