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 3E730C79F99 for ; Tue, 8 Sep 2026 17:07:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=BMGCVsS43Or0QvhvusoStvupM2eWy3k0/84tq8T1pu0=; b=tlGMBgPdUu9EdTwSJj5WAuQ8TT BSr7bBCi1If6Aqdh+ODln844taDLvxaKn36AzIDMybr4JnLmk4Ai6kv/quYisREUCpreJEZASngEU rGOn0I0wPLiiLqmxy7cWakiVa42iibPZUI8RuHreJwZGpZ3PPtSbjf3FI3kvqDDu1vxsChty1B+/u jQdan4NuIUjAvbZTsYs5WEmeu115k/wmJyxBuFLrspuC2Hk8tECGBb+0ZrOBf/dNLxcCxVJOYN9qL xCLbIAS05l8XyDBcUw6ak20ffKO0xnY3xv6TH9Mg23e2dliUMhDo5/1RpBIj8eXsVW6P6QU3R48+W O/cafGfg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3zIT-00000009lNN-1jga; Tue, 08 Sep 2026 17:07:49 +0000 Received: from mail-wm2-x10.google.com ([2a00:1450:4864:31::10]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3zIR-00000009lMa-0RZL for linux-arm-kernel@lists.infradead.org; Tue, 08 Sep 2026 17:07:48 +0000 Received: by mail-wm2-x10.google.com with SMTP id 5b1f17b1804b1-49cd5462b69so673875e9.1 for ; Tue, 08 Sep 2026 10:07:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788887265; x=1789492065; darn=lists.infradead.org; h=content-transfer-encoding:content-type:mime-version:message-id:date :subject:cc:to:from:from:to:cc:subject:date:message-id:reply-to :content-type; bh=BMGCVsS43Or0QvhvusoStvupM2eWy3k0/84tq8T1pu0=; b=gXn4NHDR9wYROSgZFvTEDIyJrVoOrGqCcyljsAu0sZNy45V2fWIC0YDUGG/PHWV9Hd qRhxZaGcUaPrh//bl3xAQdeBo0INPpoervhdmYwExa0m4AANAgSuEBbiUH1vZaTqXnUb 9s6uoqVqX6Bkn4dBC36DMl8x/gZqXIBPWheBFEZURmfli35r4FXzSfU90l28NJM506SP XthMB0zAVDbwNsOyI5yRuRO3GGHb8jx6aDTK2ahwBdo/rS/zVzz87pM6lpIPmJzFs8nd UUtMQDh0mReEOrJZlcZt96SN+ppWhi3yAe3dVatdHFEJKDWksSUGwnOV+woljT6m8APm 6BTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788887265; x=1789492065; h=content-transfer-encoding:content-type:mime-version:message-id:date :subject:cc:to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to:content-type; bh=BMGCVsS43Or0QvhvusoStvupM2eWy3k0/84tq8T1pu0=; b=iVwEBOdd3C9W9dDpalfseIS7oyvqYhkCWPWOxJyEe4pRNpfPsPVJEmW0C6qaQRseT3 AJfvRq88DtTASO3a/tEcwn4mkqKGdkDIJjZHC0C+7guVHP2DQC9qhss7OCqg5CieevTc 23AIJhOG3fJIP+VeikDUzGzUXd0UmHqY7eu3su6dSlCGK02RaTQw4Xkp5m76zA42ljbr w+GpcSQWKHkKSWGVGi03Nz/5o0VdStTaduRwvEO66p5udkQtgLhlUR2mYv9VWeiaW+fQ 7PMMrmvvTn+CWNutxxOoqekfMDAcINrJbUiuNtNkz8ufK3TPclCK2MGczNKb0R5i5eUw fDgA== X-Forwarded-Encrypted: i=1; AKwUvBxOnES86QLOnPevIftDNtVge6mybuJkW2teRYB/GrmpSjX5X4faxl/oGxTKiqhhVGVNBrbV5aM44FXkPHGOVx0T@lists.infradead.org X-Gm-Message-State: AFuF++kAEKPRF0z7wxL7Tf4BaMBk4tdLz5FOo85ELJJhsKyzVGTG/d76 TgONMQfHKL3N+RbZmvgr3v/V54vzsOcnTu75X/Boue1A+owV7XtrcDJa X-Gm-Gg: AYBFou1m1lpFyXjCrY94m2s/b+q3ntzNwxuR3bMun2mlr2yqO7Tno1EIHPxcFHzqGbs UuyDkCHs663r4BCxA8UkDI8T3zzbOMClIXyWgUSkVCQ/JVnz8Z/tJxS1SltINQP2CcROb15edFj u2tEKamDC4cxz5XaKswtZEVnrwX1wfWviTLNRISL/MsnVNKy6aVY7aGFY7Cr32U/1KsDK54owbO 9AE5LRot4VYkZx4VCb8ycLpCjdXME6QSvRE3+BgXpEdbumECBjZyjUFShf5JvjVGKNuE+13T8Qw RM1i2id2dKWXEDJpUj5kIZdbtzIzmzXJxcEYnc0PYgMdvxQOCAi+92bonK+sGeyS2N/n5l+R/LL SGU+cy4MHUYp6xl8w8OzkXzI+DH6jziVwe2C/gkUIl8XManW9QZb2KFWMdKdUBDO/tiYY6iQQQP I2uweKr2ZvDN1Z3vbpvz9bvm0YWqRGv/Pacec/tYt8XAcBHD8UxaT/mxQ2rtszVIEOJUzJTiXNO /lHiyaBIcukybkqd1+YwUWaEOT5l8IJQXFDICMKJRZNL4EBohiEBH5RnX8U98hhrK+mgvG4+uq1 9WjaooBmp9cjdZemS9C2xTojovZU+GAAZq6VHAq2O8WSX5+0lVpvLtSPu3zLyPQBMHAGei3LPnr 2T9z/1A== X-Received: by 2002:a05:600c:3f05:b0:49c:e1f1:3dd5 with SMTP id 5b1f17b1804b1-49d1f223e83mr13800115e9.4.1788887264353; Tue, 08 Sep 2026 10:07:44 -0700 (PDT) Received: from workstation ([85.186.165.159]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49cfd3f815bsm304804615e9.4.2026.09.08.10.07.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Sep 2026 10:07:44 -0700 (PDT) From: =?UTF-8?q?=C8=98tefan=20Ghe=C8=9Bu?= To: Liam Girdwood , Peter Ujfalusi , Bard Liao , Daniel Baluta , Mark Brown Cc: Kai Vehmanen , Pierre-Louis Bossart , Vijendar Mukunda , Jaroslav Kysela , Takashi Iwai , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , sound-open-firmware@alsa-project.org, linux-sound@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, =?UTF-8?q?=C8=98tefan=20Ghe=C8=9Bu?= Subject: [PATCH] ASoC: SOF: imx: Prevent stack OOB read in DSP panic dump Date: Tue, 8 Sep 2026 20:07:40 +0300 Message-ID: <20260908170740.276800-1-stefanghetu9@gmail.com> X-Mailer: git-send-email 2.53.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260908_100747_159984_49B34434 X-CRM114-Status: GOOD ( 11.73 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Commit 58bb5081cba1 ("ASoC: SOF: Xtensa: dump ar registers to restore call stack") added a shared Xtensa helper that iterates over a flexible array of AR registers (`ar[]`) controlled by `plat_hdr.numaregs`. While Intel IPC4 allocates dynamic storage for the AR block, the i.MX IPC3 path reads the oops message into a stack-allocated struct without backing storage for `ar[]`, while leaving `numaregs` unvalidated. This causes a stack out-of-bounds read when printing a DSP panic. Clear `numaregs` to 0 on i.MX since the AR block is not fetched or supported on this platform, preventing unsafe out-of-bounds memory accesses in the shared Xtensa helper. Fixes: 58bb5081cba1 ("ASoC: SOF: Xtensa: dump ar registers to restore call stack") Signed-off-by: Ștefan Ghețu --- sound/soc/sof/imx/imx-common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/sof/imx/imx-common.c b/sound/soc/sof/imx/imx-common.c index 7a03c8cc5dd4..436fe49246ba 100644 --- a/sound/soc/sof/imx/imx-common.c +++ b/sound/soc/sof/imx/imx-common.c @@ -34,6 +34,7 @@ void imx8_get_registers(struct snd_sof_dev *sdev, /* first read registers */ sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops)); + xoops->plat_hdr.numaregs = 0; /* then get panic info */ if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) { -- 2.53.0