From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4D2FE28B50B; Wed, 9 Jul 2025 10:15:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752056147; cv=none; b=cgQexa4ts1dzNd6xR3q24m+LqXA0rdZ/0V7G7TT9a9QdZzbn+G2wP47yqLwLQ+OqdeVBzpnHNy6h0ymXiYb56vyMA9ae/Q2vpwaEL7zRYrOv1zr41fERd5KtB8ZwPQxkA69WqszpqXdCyxg6a94JJNEqki4GiB0/iJG6qo3aBJ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752056147; c=relaxed/simple; bh=+017oiMUTzcNGvL2ql5WZSYDo41lxsGGaD/fxm9DG7o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mzrBN0A5N/vFdwRjjGQL35iOSAQuRSmmoF28ZKcwrWKhv3SEEzaHbhO9k2uHNbCsxFf0Zz8q078VVvhi8vyKMAdww3lEKYjDNtSFnNs6c37h8NZFjlyIwKDagHx0ZOjAkcowy0tFF2KEeRdQJG9sgUTZjMoqEH6kdQZwlxZL4fI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GbFWwV9f; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="GbFWwV9f" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 540F5C4CEEF; Wed, 9 Jul 2025 10:15:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1752056146; bh=+017oiMUTzcNGvL2ql5WZSYDo41lxsGGaD/fxm9DG7o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GbFWwV9fmYQ5jj46M19Z8KVdX+amQc7za0xXZvtGcMDfJ1bYvM8T1kI4omiRvUmTt aj2hhr40i4WegB/Ec/iqzd08KZ+N4Gx9VJ0vZFgM77hglSoUSh4qgSgwHbShptMDUr kSuZqnDl6qjogzL2IZrvJCebmoq86bY9N8qEh/1o= Date: Wed, 9 Jul 2025 12:15:44 +0200 From: Greg KH To: Krzysztof Kozlowski Cc: Luka , Jiri Slaby , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: Re: [Bug] WARNING in vt_do_diacrit in Linux Kernel v6.14 Message-ID: <2025070923-alabaster-trilogy-d011@gregkh> References: <2025070805-stoning-overeager-39f1@gregkh> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Jul 09, 2025 at 09:07:00AM +0200, Krzysztof Kozlowski wrote: > On 08/07/2025 09:49, Greg KH wrote: > > On Tue, Jul 08, 2025 at 03:21:36PM +0800, Luka wrote: > >> Dear Linux Kernel Maintainers, > >> > >> I hope this message finds you well. > >> > >> I am writing to report a potential vulnerability I encountered during > >> testing of the Linux Kernel version v6.14. > >> > >> Git Commit: 38fec10eb60d687e30c8c6b5420d86e8149f7557 (tag: v6.14) > >> > >> Bug Location: drivers/tty/vt/keyboard.c > >> > >> Bug report: https://pastebin.com/yuVJpati > >> > >> Complete log: https://pastebin.com/qKnipvvK > >> > >> Entire kernel config: https://pastebin.com/MRWGr3nv > >> > >> Root Cause Analysis: > >> The vt_do_diacrit() function in the virtual terminal subsystem > >> performs a write to a user-space pointer via __put_user_4() without > >> ensuring that the destination address is mapped and accessible. > > > > Where? I see calls to put_user() happening in that function, and the > > return value is properly checked. What lines exactly show the issue? > > Greg, > > Please don't waste time on this bot. It is AI generated spam. The person > learnt nothing from previous feedback. > > I suggest ignoring completely. Thanks for the warning. Given the lack of response to our questions, I kind of figured that was the case :( greg k-h