From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) (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 C3052285C8B for ; Wed, 27 May 2026 05:18:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779859094; cv=none; b=P6YABfK036EuVwGGSWXhb5f5+zl8650HbebKkaSTpp6UhYJn+ikV+VFilLZ8Dvv4qEotYWj3qdVUESJRJPQM1WzJOs2BpdoL+RzFzSIqeH8SPoI9GnV91aRPmEv8JxEwavYjI3ngoF6Ke5VVyuadhdZBWshdm2y8ccfxsyvs4Dc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779859094; c=relaxed/simple; bh=a4AHPcspWRXRpwIp/1kvg29HkxGqT3z5y8I2grHxK5E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iioMtwkbBJ8QwkR6hWmc3FVxG8Hn+Dr4WVi/+TwGovCcwb/ChECH41Cl0PmVjtl+0Rkmi6RsB8QmYaPhheEjVUkqvWADS4EmH40mVtzk2fRnydtkMJ7Y41siycIMfgcG4dQIQjlqT1rWrMTA/yCBy24bAPH/xmNjwpbvesf/nY4= 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=URESoi6s; arc=none smtp.client-ip=209.85.210.177 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="URESoi6s" Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-837b39eb078so7833603b3a.2 for ; Tue, 26 May 2026 22:18:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779859093; x=1780463893; 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=a4AHPcspWRXRpwIp/1kvg29HkxGqT3z5y8I2grHxK5E=; b=URESoi6svm1eDHgWYxDCmmKfDRG6UmsOWndVbRB/pva0Lls8QzZaj9F1KPSfeiiaDz pRz8RPwTEWuNE4UQZnDfAtvZ72Xh0xTcOo62qc26Q5GpVJFOakoLWYROWB+efeyDluQt aR6SpxEt8gqxZveLtsaWHSl7bjI12lwRJXUzvC6h0SI6O8f5mkEjt+63O681YgmaDXvT i8PxJIZ88BQ+O5yBZKW/qsI7EwnIXlQmMSlZkPP9HBaK1OD5y8MPWoAdsWarzVcx0qjX LWYDuUjhWCQnSZK0F1UHvGwIOlFj84E48QDKDw6p4ISzHJVUxvkQ3j6aqLwkTO08Ilri aUGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779859093; x=1780463893; 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=a4AHPcspWRXRpwIp/1kvg29HkxGqT3z5y8I2grHxK5E=; b=p/GjPuWKIBPCNh1w1bxY5bsAvjzsMgvKuoTjajRcM1x8NjK8QyGBQlpccSRaVT+/Kt Mrws9k+WFfl+PRDO3pp8YB9feWZLbQYsXQNqIVAZvk6po5x76VNSv38WkwyOjyVSqeZl 9TUXgOdRzAx3xAJ3d0Ex1BPY+OSIbBT6E7snKt7mjS4YEKcT+Mz5jYn5jYh3jtSvdsuF awY1fbKToBLt7FhmSgJAK6VPPlya87M9kE4q3AMp9OeC6mG63RplghbCbxJMsETSrJem ouXc4M0glskoTJokgUpmGdKbp0pB0obseq3kqHAgAintnaLe80Frdq8KdwOxDwX42FwI XUAg== X-Forwarded-Encrypted: i=1; AFNElJ9Gqtm8w1I5Ya8DiIBZb2a70YiErMBV1GyDFv/VpeawwBSvaP/QvyakPu+gYeCtoYT2kpF8FGY=@vger.kernel.org X-Gm-Message-State: AOJu0YyCZBYkQGTkI5Vl5MmugEH+obLpYF7jN3gqUSq/sfYj8+NuH6cd q5zvNZIAlurQGtAxvswHirkjTHRbA6UT3MqLrJg3Nc6UaebVINka9crK X-Gm-Gg: Acq92OHLRSBaxg+vO9cRBkrpC6yNBceYQnboQyCwexzo5tvybh8JVAWO1Gx9TG6PNql ZZbykBmTX912p8abKx4WCZoNgxRbYzy06qO7f5Y+PUS3Gg3dAjIZOkljDtw/02KbA15HShL9RB2 BHg664Cb0/pUAGzfnEM0qJlUc49Gxmujj5KgslVBc5It1srCzdqTanoJxmlykEqbYVdFekJ951H +puQsYoJlJuipTjmQrYMlMgRzmHHRPD3A7SKHjfIKCCz9n6gkXFstf7/78NrrMJdPCMR1Bouh/r zuMw+CfG2t21u8e/AXEklTyWvpzdGJ1m1ttWMSbU9S0GBK8YHOmILN/wDnJivwy3AQW+r/uBxMk oNPunmmJR2d58GR6UAFhaSjLG1Y2kkrlL07VHGqzHPRzy7NPldemotHhV3b1mzQctlp5MGxQblM 75v6o7qHLOKtntPdsk/q3TmfSD907sOMSRNaC8V0HZBPMCCfrk5G2L6gwbdxZPDmXTkkVaVhJSU L4eUmvFJmNTzMmZnQqVG0Rmp5WKsNOuXM++kX5EjGcUTzIIE3nKIu7q69rt+srb+7Zap6Hp64SD GBMH7vwpidZMktw= X-Received: by 2002:a05:6a00:2d25:b0:82f:5051:f024 with SMTP id d2e1a72fcca58-8415f5dcc6fmr19865612b3a.27.1779859092898; Tue, 26 May 2026 22:18:12 -0700 (PDT) Received: from codespaces-78f0a7.2t4prynt4dlezbzls5ze3dxsqg.rx.internal.cloudapp.net ([4.240.18.229]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-841d6eb031fsm1146897b3a.16.2026.05.26.22.18.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2026 22:18:12 -0700 (PDT) From: Muhammad Bilal To: pmenzel@molgen.mpg.de Cc: linux-bluetooth@vger.kernel.org, marcel@holtmann.org, luiz.dentz@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v1 1/1] Bluetooth: L2CAP: fix heap over-read in l2cap_get_conf_opt Date: Wed, 27 May 2026 05:18:07 +0000 Message-ID: <20260527051808.47220-1-meatuni001@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <51761fe5-2244-457b-bf60-060e43f0cbd1@molgen.mpg.de> References: <51761fe5-2244-457b-bf60-060e43f0cbd1@molgen.mpg.de> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Thanks for the review. > By any chance, do you have a reproducer? No standalone reproducer is available. The issue can be triggered by a malformed L2CAP configuration request where opt->len exceeds the remaining buffer, i.e. a crafted packet from a remote peer. > I always wonder, if Linux should log a debug message or even warning. Existing callers generally handle malformed configuration options by silently aborting parsing, so I followed the same pattern. Adding a BT_ERR() on -EINVAL could be reasonable; I can include that in a v2 if preferred. Regards, Muhammad Bilal