From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B82BA345EA2; Sat, 12 Sep 2026 17:07:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232825; cv=none; b=lUepOOOTfmBMnvjx3YEKxN2Ryh6x2AGnkPt37+MbKgmuFzkAjbR2yQUtiEgs+HSood7sp7677pICF2fd4FxXuAQGIco2n2yArwsjpsQs7ERzBrKUH0vRegHhOHzmFGevO2DWfyjbXKxQ7DwY+Jld6HOvE7nKahkK9qb9lO9X7ks= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232825; c=relaxed/simple; bh=degXE2tOe8hp+u18No7aG1Uso9Kgh8Q3WAqHLwj68ms=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TbMqzSRAWPsFmC/e45uRmULTz/RSbEywhATrU0N55Lf9m/UIELYGVvlmGCgXXj0Tlid0CqAe6w+yw3ETu69vqFk4hqmyYdc2ALJfJE7gZEuPQuE8YgjlT3sCAiVkrJ4iSq7DAy1AmJtHVXxHAMpz/VcYXJQFh2ocq1Yq1oLKgoI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dB74P/Ck; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dB74P/Ck" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03E731F000FF; Sat, 12 Sep 2026 17:07:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789232824; bh=HDfrxaJ2kNnPm90vqJP+Px4L3Ym+SipP1a9i+rwbRys=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dB74P/CkMwMW+WFnVCqpH4w1I7K/f07ln32lNfElxhRhKy/gzmsxTesJXbWwNEosD QH9YEJvZziz05uJuGtA17+m6UpF8DDRX5HXWOiccDLZCInx0YH67vYhI5Ad5vKIBtq YSuNqeKJZyE8q8+9VuvehwROQjGxJ05T37gqZd0w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ilya Krutskih , Mikulas Patocka Subject: [PATCH 5.15 090/935] dm raid1: reserve space for NUL-terminator in build_constructor_string() Date: Sat, 12 Sep 2026 08:52:00 +0200 Message-ID: <20260912065528.888847234@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ilya Krutskih commit 73c37fe54cd056d07461b142ab0b8b81e1ef6ad8 upstream. Reserve space for the termination NUL after the maximum 20 decimal digits of a long long value to avoid buffer overflow in sprintf(). Fixes: f5db4af466e2 ("dm raid1: add userspace log") Cc: stable@vger.kernel.org Signed-off-by: Ilya Krutskih Signed-off-by: Mikulas Patocka Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-log-userspace-base.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/md/dm-log-userspace-base.c +++ b/drivers/md/dm-log-userspace-base.c @@ -138,6 +138,7 @@ static int build_constructor_string(stru str_size += strlen(argv[i]) + 1; /* +1 for space between args */ str_size += 20; /* Max number of chars in a printed u64 number */ + str_size++; /* For NUL-terminator */ str = kzalloc(str_size, GFP_KERNEL); if (!str) {