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 401BD4F7CCF; Wed, 30 Sep 2026 17:28:17 +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=1790789299; cv=none; b=q7Gdvpw/s3dBPoQuwqTDRsPCMMGMFenhVTqJa3335UmBGMKHA4m8huVc2+nRaELuS7Ew95Z746+crJuRpl+8QIbEJ6kssimlDqFVqZUH23GjHD5CriXPK4CCDL2FH1G0FOIrv55G8cRLQUjJNb9IwcX/C6ARmXPn8X5Or0/rVMo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789299; c=relaxed/simple; bh=bVotDYIO9o/KjPbW5ABHJ0IbytWj0w19FN9MNq0yuR0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HOIYxapBWsIb+PBPY+gt142jqzLqyMO4oupPRApqKJA2voYqVvqrJTTSVGu7UJGtQ41/aIEEaP7cJZSFjqWeyp2NVds8shYcwyG0+/62TnX5aayecEs4yrJb5G+3laP27uaCmHMvpum78BnYPvfg31Bt6Vb/e4xn2Ma+fNmc70Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=F2or0HP1; 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="F2or0HP1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 483DF1F000FF; Wed, 30 Sep 2026 17:28:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790789297; bh=1RpqeyNobUJkqFLIbrosLrYwopfUxYRATDqzoidSL/A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=F2or0HP1EC9hinZESLXCE1+A4vnVHS9sZV5+dxU+H9z/sUkJLYrJuvlpLQ7zXM3XK wZaQq7T8nX4T7HDghFfJwB/82ixQkDfNCh/R1eMvI0MdpsY8ArM/EreGAv2HVfE6I4 ElKEWkuowXbUF03hJMNOywo8/MzP2hyOdRSTvtA4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nicolai Buchwitz , Florian Fainelli , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.12 428/877] net: bcmgenet: validate Ethernet address in bcmgenet_set_mac_addr Date: Wed, 30 Sep 2026 17:22:19 +0200 Message-ID: <20260930152423.924347990@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152414.738996857@linuxfoundation.org> References: <20260930152414.738996857@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Florian Fainelli [ Upstream commit 273941c85fc2632cd3e56ddff737b9245de7697d ] bcmgenet_set_mac_addr() did not check whether the provided MAC address is a valid Ethernet address before applying it. Userspace could configure an invalid address (such as all zeroes or a multicast address) while the interface is down. Add a call to is_valid_ether_addr() and return -EADDRNOTAVAIL if the MAC address is not valid. Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file") Reviewed-by: Nicolai Buchwitz Signed-off-by: Florian Fainelli Link: https://patch.msgid.link/20260921220021.281418-5-florian.fainelli@broadcom.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index dad5adfadb76d..a326ee63c1b7c 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -3562,6 +3562,9 @@ static int bcmgenet_set_mac_addr(struct net_device *dev, void *p) if (netif_running(dev)) return -EBUSY; + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + eth_hw_addr_set(dev, addr->sa_data); return 0; -- 2.53.0