From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f170.google.com (mail-dy1-f170.google.com [74.125.82.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DE0A3A1D14 for ; Fri, 26 Jun 2026 05:18:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782451094; cv=none; b=oID+UTcoig3xukinFeDsPEW3DXkWNoE8ZlbxWztWrViDRhLFPxkkiPo4tv5j1elQ2LijQlXbvLvQQxoSMTEieyUHMKbZDGaFb9Ox9Fh8kPj2SM7UjrTRReoLOQp/qJT6Uz7mfK520TwWO+4QCp7VWuSHEeDnAVyRfmdzLLySafM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782451094; c=relaxed/simple; bh=oI305MqoOf4OcBFfWfvo2q/rW61nNlADLsX9gv75Y20=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JDJaDTxdhcUoTckXLw/I8yx/OZIBQEb6SZJ9i/nw84/FDS7RWSML6dWr3c4GhgSdYaSbPIhakRIk8+9HqB38lg3VTq8nEeGLuFNvULCt1SczZqMyEihvkC2np+gKHCuVP9t3D0LZCH1cS3qTMpG8NroIoWTO20WTe4d/vHRS2J8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=rg5epz9C; arc=none smtp.client-ip=74.125.82.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="rg5epz9C" Received: by mail-dy1-f170.google.com with SMTP id 5a478bee46e88-30c944aacbaso874009eec.1 for ; Thu, 25 Jun 2026 22:18:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1782451092; x=1783055892; darn=vger.kernel.org; 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=D9f5K0F89CIVZXgY481pC2XHEuVEtLfkjz9FoRFy/os=; b=rg5epz9ClOHBKynSxajNKm8CtwuG9za0SM4YheYjsiHpY94kFPBOb7q96mQMl28Tdg yFcln44B5px8dKDFKF9eBhPiwazL6xlzcY/HzZQ+62tEtO+AMDdG7Omv7q5O0EO4Lg8a 3+LATSJC+CLg7eebTwp43fkeeOw5cKX2BxWcq7K4izKzbyz8Lnvtkglw+iOsWaCMfjyi /w/KoFwlYA5dH1MlvOdLKmIBqNZwbla6twUKaHy8pLzYEPQSh7A4GNUwkFLuZYDMI9pd R9vi4gCKpX2Pd5KTHtEq5bdQdwVzeSNoe/4Qg2xvdoDgNPuvrXCXhbDD4aMCfB/uFWbp PHrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782451092; x=1783055892; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=D9f5K0F89CIVZXgY481pC2XHEuVEtLfkjz9FoRFy/os=; b=hTKJZKK1uHxH2GXEK/vdX7H/8IEDMWVlHEB/grVU2cgnvjNpyV9wghVB7k9A59UQLX FFem+RIxKs0i8iCdiI/YPgfV8eegyzx+3Eu1mGBiZAFSNYHdSjfJjXneVKMQuCyYFGBw +XMz0aDrmmfn4q1xnRVoq6ITeuaOaUcb/+Zs/cHpaEzUvj4NPjP+Iwrj7uecADGsCTdi Z4SB+DSk5GLzZnuZmM9bGh2eI0bA1/zLJfIAcxs+2/RnQ6kFj/i92sjoWLQAVQa79QZc ONlnd+Kg/WEKA+B4XEAmnrSpBI2ctWEjIMZy2N5rAk3uUBWQJ+g2411MQfNDrfZ4e5Za QhBg== X-Gm-Message-State: AOJu0Yw25bxy5uYSr0BUU11l3cC1jGYyw8Ehs3r4sPhO7l966Kahh0X9 HCemUqVuaiaqzb7tfmlcX0pQD/vIcPqSafpfpS0zodCImhqi7tXspF9n X-Gm-Gg: AfdE7cklY76lzM4uh2yZX9rkIGSBYIIpdB6qxuugQ9NkzcF4XtoeRXZ49ytwVANTFDl PepnhVvO5cR2AyrJlXxuPgZG0QmvGNFeBiYrJ6cMkBxK6AX3eW8HZ7NvCIZcTGCBKEICZXww38Q QQul2gFh5tqaEPcvaSum8RRFkF81DQ71GAp7HsuHFziZ1w1knb39ttnfdUsN7932g2sEUApSY5s 2xm1yobssy9gQrtZ+gHi7U6KPdf35IW8AQEp7aHoDNQ/V0F3wcNX3809qdJsSkk1q11zqrNMvgk JX6FZa/9RwL95k5Xjdu+n+koMHPGhGs4zNrvHBDpx2COLdGGLV4Ia2YMBqbexSlXpLsUc6begje jtIW0+DA9ojlvsUlepWH0klKZvWlAFHu8Nr/JqTB0NWfrbIqnY0rR7Po7Xjfodbo0M0DKZaVDVf 7Z13mlRbkBVGFHIahddgN8gg6k2up7chXshjLBt1zKzMR/2tFLRa5h+EQgj7Y8b2mSWJ7aLBGd0 Ja+ X-Received: by 2002:a05:7300:7fac:b0:304:2176:a871 with SMTP id 5a478bee46e88-30c84a265a1mr5890749eec.0.1782451092285; Thu, 25 Jun 2026 22:18:12 -0700 (PDT) Received: from dtor-ws.sjc.corp.google.com ([2a00:79e0:2ebe:8:a474:bf4a:4966:8d97]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30c7c9e9214sm14804188eec.20.2026.06.25.22.18.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jun 2026 22:18:11 -0700 (PDT) From: Dmitry Torokhov To: Bryam Vargas , Hans Verkuil Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 05/10] Input: synaptics-rmi4 - block s_input when F54 queue is busy Date: Thu, 25 Jun 2026 22:17:54 -0700 Message-ID: <20260626051802.4033172-5-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog In-Reply-To: <20260626051802.4033172-1-dmitry.torokhov@gmail.com> References: <20260626051802.4033172-1-dmitry.torokhov@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Changing the input (diagnostic report type) mid-stream changes the report size. Since V4L2 buffers are allocated based on the size at stream start, changing the input while streaming could lead to a heap buffer overflow if the new size is larger than the allocated buffers. Prevent this by blocking VIDIOC_S_INPUT with -EBUSY if the V4L2 queue is busy (streaming). Fixes: 3a762dbd5347 ("[media] Input: synaptics-rmi4 - add support for F54 diagnostics") Cc: stable@vger.kernel.org Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Dmitry Torokhov --- drivers/input/rmi4/rmi_f54.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/input/rmi4/rmi_f54.c b/drivers/input/rmi4/rmi_f54.c index aebe74d2032c..e86dfc9ce7d9 100644 --- a/drivers/input/rmi4/rmi_f54.c +++ b/drivers/input/rmi4/rmi_f54.c @@ -445,7 +445,12 @@ static int rmi_f54_set_input(struct f54_data *f54, unsigned int i) static int rmi_f54_vidioc_s_input(struct file *file, void *priv, unsigned int i) { - return rmi_f54_set_input(video_drvdata(file), i); + struct f54_data *f54 = video_drvdata(file); + + if (vb2_is_busy(&f54->queue)) + return -EBUSY; + + return rmi_f54_set_input(f54, i); } static int rmi_f54_vidioc_g_input(struct file *file, void *priv, -- 2.55.0.rc0.799.gd6f94ed593-goog