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 ECF984119F9; Fri, 4 Sep 2026 05:19:39 +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=1788499181; cv=none; b=SNuoX7ezvoGNdZIwyXoev9iV7PCrJVf9d1tBT00Dx9KnbUlePaHJwvkx1tSJmWHmuSbpTfrL0cxPTMznvc/1hkU5dS9OLIjOcSQy6Nywft3zpo1Uuy12pCN8Qnq/X4P1dmwUQyMSBpgd4DLYrm/TpRDvvJnTjFkIpuTEp7IIJsc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788499181; c=relaxed/simple; bh=qvT2Vg5u1F24vbGlenOpE1N1SNFPoERMsz5Q7caXH5E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sRYJFoB5Dmv0lQZb/rIUi+HeCZavAJZjubhyZGTd5S08iDbmsusTu8mSrAUw5vQ27dkbhs4Rz7azr0fL2GVWL5b+KJJ6ecFtgkLVNXatbB8L8yKTAHCVy/CBa8J0qNvZSIhfTw7kQO+jBqDEkRpYPGNf3XEdgooOEgBkevjrQvk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ePjYiJCD; 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="ePjYiJCD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51C3B1F00A3D; Fri, 4 Sep 2026 05:19:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788499179; bh=BX7UNxEVZXHAnL3QIJo/l23nezJ1F+kmVMATQjcJJgU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ePjYiJCDPTYD2MuAG/d5KzQAQDLGYe3s+Gss+oem1yUpWDmqXfAuyMfHm/fbQ7ZmR CfpkYWow+1pZrOKN1J90kXn4i5e+zeCJXhtJI556uoG7peVNHcQz/TCG6zh60Y5g3a Af+xerKA+3z6wpWR+ttot1zK9t7bYO1GTsnZ/2js= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ilya Krutskih , Mikulas Patocka Subject: [PATCH 7.2 327/713] dm raid1: reserve space for NUL-terminator in build_constructor_string() Date: Fri, 4 Sep 2026 06:54:55 +0200 Message-ID: <20260904045811.161310039@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045803.810145556@linuxfoundation.org> References: <20260904045803.810145556@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 7.2-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 @@ -139,6 +139,7 @@ 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) {