From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-y-209.mailbox.org (mout-y-209.mailbox.org [91.198.250.237]) (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 9BDBC3D6CB4; Wed, 8 Apr 2026 17:24:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.198.250.237 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775669084; cv=none; b=H9u+Ln9jREyuE3wsrRGuPmMBSV3AJqHGu/yNGu4iAF+0FGir3DobCgOOIvk5UY/LjHwylsqnDmT+rz0X654CVuSmDG4aYHDejQOdvx7C1v10Ixjx4RA1wirexQlykGy9iVB1UkNFaT52EKxytJTGYhIOS6q006MfhOJdzBcLXJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775669084; c=relaxed/simple; bh=o2OPnmblJ0j0eXLZd7P/soJwLdeDIHIZhA+5n/a0POc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=WNbouPje277dbbm73SpVYLh6q5J0JrRQfBi8QtLCyQnGF5WNvo3hbTakLxBdvDR2OhWWK61AZXbRKdeHU2TnCDZfLYKRfT5CgTAps8XpCNhzpeoEuchXv9+L9U6rvvubeGf9708Y6mDgf1/ip3e20X8CpHorfSkLE9N+zxJbuxI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=XMMoKewu; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=ZTs2iBh+; arc=none smtp.client-ip=91.198.250.237 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="XMMoKewu"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="ZTs2iBh+" Received: from smtp1.mailbox.org (smtp1.mailbox.org [10.196.197.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-y-209.mailbox.org (Postfix) with ESMTPS id 4frVLB4szwzB151; Wed, 8 Apr 2026 19:24:34 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1775669074; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=D1Btw/zx+p6Jb5xjhBRZAHRgFiIdx9r+i3hCH8sIMz0=; b=XMMoKewuZEkQCJDvrsau0AcZGhmcAYVFTuCMcKrt+H2ywpy50ItOs3w5iOuvUXG873n2YH ja0gKdzvsKx9fokmn1YUV/Rv/lMhs0gcvHtMWfQNzS7IeUCQJT9lT5SXtwp7RmZU2qb8ej lV1FwrlLrC6czLRtsXsDgreS5kvE080z5x6Nfbg8ZjrvVti99CQHeDZ+WyopL38Wyqe0Ht B8XEz6a6U6vZqIHQ6IgAIC9mCCQPDSl9iex/dW4dVEQ4IVp5STPN4ZY9UOap71XayQmbeT X3h1xcW+c2rLSh5aUUpwl6MykKRYKNoru2LFGxCc/QPTIepvOhVDDMNbg2KqnQ== From: Mashiro Chen DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1775669073; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=D1Btw/zx+p6Jb5xjhBRZAHRgFiIdx9r+i3hCH8sIMz0=; b=ZTs2iBh+gdBacCV1+AunpRorNSQB6o5tM8f1CfC0RgrHHkgOY0Xq4Llp5K8RlNUNSP8Lwc L2wZ9zGkhgaY1x1TtuY/hLxyv14TkAlN2+sR/h6neOcWk1YX+tebJzVqEBQgIxv1rEdZfv BKZFHsbaSXVOXa4XuJLcNG2xferx+1P64zHJZJChdTRtu6Rw2bsgrGPxVjm11WxVpUqiQj ZOIHxs+/sYJf6cAparxzH2GZZ62zfKW4BB3jGKmVcl8mZTIr4Y76WJsByDwmbb6LDxXE7Q BrGa853dD50ljIRaaif5RUqZvNHY7sT3u7fva/Yhr6ZwWXVYNZHDefoZIdfvZw== To: netdev@vger.kernel.org Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jreuter@yaina.de, linux-hams@vger.kernel.org, linux-kernel@vger.kernel.org, Mashiro Chen Subject: [PATCH net 0/2] net: hamradio: fix missing input validation in bpqether and scc Date: Thu, 9 Apr 2026 01:23:56 +0800 Message-ID: <20260408172358.281186-1-mashiro.chen@mailbox.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-MBO-RS-META: 1fe9xf4r1kkjbj47t71a54rd6hriocxr X-MBO-RS-ID: 3cc5e3eac2246861a89 Two fixes for missing input validation in the hamradio drivers: - bpqether: bpq_rcv() computes frame length as data[0] + data[1]*256 - 5, which can underflow when the length fields encode a value less than 5. The resulting negative value is subsequently used as an unsigned length, leading to out-of-bounds access. - scc: the SIOCSCCSMEM ioctl accepts a bufsize of 0 without validation. When a receive interrupt fires, dev_alloc_skb(0) allocates an skb with an empty data area, and the subsequent skb_put_u8() calls write into the adjacent skb_shared_info, corrupting heap memory. Both fixes are minimal, adding only a bounds check before the dangerous operation. Mashiro Chen (2): net: hamradio: bpqether: validate frame length in bpq_rcv() net: hamradio: scc: validate bufsize in SIOCSCCSMEM ioctl drivers/net/hamradio/bpqether.c | 3 +++ drivers/net/hamradio/scc.c | 2 ++ 2 files changed, 5 insertions(+) -- 2.53.0