From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f177.google.com (mail-pl1-f177.google.com [209.85.214.177]) (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 76B0438F646 for ; Mon, 8 Jun 2026 07:49:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780904976; cv=none; b=A9i6Uu/62d7XstIRK5hQIH+rAd5EY8qaK0IUbGA9WFgRaglnpuTwLvVe5nXVT6FGRafafOK6tekfo/DSWiKIWO6VXCXGKerDjvT9+amGNVNUqar2L5AHaC4xydi+5OowZwhQ6cpJ6U3+PFfEODUkYYMurNixnAYNN5ajhgFsyvE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780904976; c=relaxed/simple; bh=7FruI+Dvsw923Gy0MPP7mCp7wkqvpoIYW22W5HE/0rI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XKjbd+ALzAxMaDNsReHdLtH2MqXN2cPVePv2KF9jgqRB58c6mepq6/ewt8YckUEwuP6TcssTX74sEeeUTEeALTT9yCxZ+rgDMmTBEkHV7KQ6GrGo2tW6gsAradCuNYnbk2f+zQdglb74tehFzs407MRcLpK+DoVK0QJje5p77rA= 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=dtRrNipJ; arc=none smtp.client-ip=209.85.214.177 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="dtRrNipJ" Received: by mail-pl1-f177.google.com with SMTP id d9443c01a7336-2c0b9328c4aso27811215ad.0 for ; Mon, 08 Jun 2026 00:49:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1780904975; x=1781509775; 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=EkcDIJRx6OSinr+5cJSRrWVMPrwGSeXex+O9jyO8udE=; b=dtRrNipJSFfNPmjRlp23btY8akVAejSFkcMKOnc4ZoWf8CgBncEhlbQzSdvFiNFl0F 1LefpqbzuxetFiLyrg36OtwL2Bc4/MvWjQIXLz4E1OCanUAlG+CwAPMvWap+WQ7Jem/9 rBXCH5BLg6DvflIMzp5fGRwFiAPP+H1ptZW8jhb85/nZIv4bu6hdjtgX5zj5XrNWvqGq Ifv8POe8j4lt0m8k7HIQP+/cPdMGO7VwbwfkQ7tNBjefswQezWhEO3KtiNuobqZP692b nn03hctOCkioWDUFbj/JZ83EbRkxRggTPokGoXZn+PNdhkn/a7mFwWMD2s1MPim238Bh eJJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780904975; x=1781509775; 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=EkcDIJRx6OSinr+5cJSRrWVMPrwGSeXex+O9jyO8udE=; b=F8Uv88+M+O66WRgYKtBEFu25DRJZrwfVm8NQyQGDldW0qESQKlAzkq9Vo8TJ5dze/3 OYllj33Lu/Rllkpvu6zQ+jd9qUVsZc+PXUqNKScCzXqFZ1rE9Mcc0AKm6i6lxCkmMH8M R3vQGMffc8FT3Cy7hSGNiNaS06B8G5JqdcULGB7gLfgW76/B5xcbSV1XHiS2pOPn8rSq PCjS6J/VkzpIKBoit9IcNhTsonIRLeZTsFGy9xTgIDBO434NwfTzjAmg/UqDhOgowzAd u37rUxdnHTaEs0WjLMvG2xbz+rXLRYEVnal7gfK7TLb1wZ2a4CSYjIeZyTx6D24qBwaW imdA== X-Forwarded-Encrypted: i=1; AFNElJ8Gulp6scH0jNkNf5VbGlxJD9CXWjkHVczw5F/3RFwOeecjge+Ee/3qj79kOhDV8jA/JR3nNdQCMs4+Zqc=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2nfIkUBgz4r/u6RAjmCepJSomFu6MbdjECzYTnjT15O7qlS8h rqFIkP1AS0NRNwGYw4gMW1w8Ppc05gfSPf0GrYVAd2EReC/vdHasD498 X-Gm-Gg: Acq92OFdI1We17CEusIs7gcrE2PEvWkAn2EVkMjTl4qrOkb4IZQKRzhMiJhNQPX5Wy7 2BTUYHXb9vjbPQDRXM5Zz8zT0/b5fyyjPRIvYjF58vkHIh8xqhUQ68697sniZxNScRjsPpgWwbz 5vOp+kjCw1tBLoDUCfZpNHZF+6sosXdmIYC2hNpntS7nAXyL5uCI1U2UuLmqz2Qs7lJTcqFJ1Y2 XtVKkUPcyb0+UvvZukwB8w1R7P22PuWQldSzJNz4TOtrcf36eryIu+3Kgu3TdMBw3e6XbPFqL71 1IrGkLMugngFFBuV64bRIJwB/K87AJL9+aSg4Qqh79YlbqWsdvM7EgD74BSs3LJf0SU6ua5b+e1 TMsXCASkulmY0iavnjpN8e6g1z925l5cbrBMvjVvVso5Fvp5qBmkFq2TqUBrCZlN5XAA7yBkO/X r803Be7DDrQeOpsNZ+Dk7rc1SFcuLeZ06DbUQb4WmLsssSdlQdrTpCYuc1o8SmOgAHkXrQD80qo mY7bi9m7Ph2RURCGnOSw6PJGoA= X-Received: by 2002:a17:903:3845:b0:2c0:a711:539 with SMTP id d9443c01a7336-2c1e7b3fe70mr172755345ad.5.1780904974861; Mon, 08 Jun 2026 00:49:34 -0700 (PDT) Received: from nugod-NUC15CRHU5.tail9f095a.ts.net ([218.237.104.87]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c16649d2d4sm160157485ad.77.2026.06.08.00.49.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jun 2026 00:49:34 -0700 (PDT) From: HyeongJun An To: johan@kernel.org Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] USB: serial: kl5kusb105: fix bulk-out buffer overflow Date: Mon, 8 Jun 2026 16:49:30 +0900 Message-ID: <20260608074931.5911-1-sammiee5311@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Johan, Thanks a lot! Yes, I used an LLM to compare the custom prepare_write_buffer() handlers in drivers/usb/serial/. kl5kusb105 passes the full "size" to the fifo copy, while the ones with a header or trailer, like safe_serial, reserve that space first. Thanks, HyeongJun