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 89DD02BD02A; Wed, 4 Feb 2026 15:30:00 +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=1770219000; cv=none; b=CsPDvn27EBLWIDCiqgwQfFrw4ImUWm99Sj6EYWfhEQQgCQBb54SBe/Ybviis7UZ9nV3/cKIi/879LBxEBLVYEz9C2parEntDabC1EDPcPdDjOrUNEArv5sCcJ4xU1aU7Kw5bcXvcxA+TAZyOSJcHomTqETSL5b8hC4ZmHs7JNz0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770219000; c=relaxed/simple; bh=1BmWPccK52VkEyJuFUlIEfbbe2bBOH643nOX3xVqQik=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=k+x2fM+Hjg7Q5GqNe9pM2wLX8MJQWtZlE1W011nVM8WE81mtMw8xyamHjKe2OG4snojkBz51XUzh123ZMZYo1tfGz/5Grdd0dWKJCwEvjXzmubjBqrmaigd32HPboCPP13EhvfjAIA10fen3FRzF4e5fV4qF4PgjmUftSGCak5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vO7q7LtC; 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="vO7q7LtC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7730C4AF0B; Wed, 4 Feb 2026 15:29:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770219000; bh=1BmWPccK52VkEyJuFUlIEfbbe2bBOH643nOX3xVqQik=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vO7q7LtCzIBtxLAZo5YCu4TRDrdOMcrRhHEORGtRJYGb111/Emn5uAviHOakVxicy c5g2A78KV+BQ8NOKQmbWpqdn0TRiBHpUnvsf/kxU4USGddXX6faunfUYsHX5h55vgI b0gGCtp8znqCRwir1ewInHDDfO6l3ONU2UPbQ/LA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kery Qi , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 6.18 038/122] scsi: firewire: sbp-target: Fix overflow in sbp_make_tpg() Date: Wed, 4 Feb 2026 15:40:20 +0100 Message-ID: <20260204143853.231473187@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260204143851.857060534@linuxfoundation.org> References: <20260204143851.857060534@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kery Qi [ Upstream commit b2d6b1d443009ed4da2d69f5423ab38e5780505a ] The code in sbp_make_tpg() limits "tpgt" to UINT_MAX but the data type of "tpg->tport_tpgt" is u16. This causes a type truncation issue. When a user creates a TPG via configfs mkdir, for example: mkdir /sys/kernel/config/target/sbp//tpgt_70000 The value 70000 passes the "tpgt > UINT_MAX" check since 70000 is far less than 4294967295. However, when assigned to the u16 field tpg->tport_tpgt, the value is silently truncated to 4464 (70000 & 0xFFFF). This causes the value the user specified to differ from what is actually stored, leading to confusion and potential unexpected behavior. Fix this by changing the type of "tpgt" to u16 and using kstrtou16() which will properly reject values outside the u16 range. Fixes: a511ce339780 ("sbp-target: Initial merge of firewire/ieee-1394 target mode support") Signed-off-by: Kery Qi Link: https://patch.msgid.link/20260121114515.1829-2-qikeyu2017@gmail.com Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/target/sbp/sbp_target.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c index 3b89b5a70331f..ad03bf7929f8b 100644 --- a/drivers/target/sbp/sbp_target.c +++ b/drivers/target/sbp/sbp_target.c @@ -1961,12 +1961,12 @@ static struct se_portal_group *sbp_make_tpg(struct se_wwn *wwn, container_of(wwn, struct sbp_tport, tport_wwn); struct sbp_tpg *tpg; - unsigned long tpgt; + u16 tpgt; int ret; if (strstr(name, "tpgt_") != name) return ERR_PTR(-EINVAL); - if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) + if (kstrtou16(name + 5, 10, &tpgt)) return ERR_PTR(-EINVAL); if (tport->tpg) { -- 2.51.0