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 10C925326C4; Thu, 17 Sep 2026 17:28:34 +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=1789666115; cv=none; b=poUiPKP1Z9WQDq20d7tmNoQM3V9El5FqIG6vOTVT5vVbSHogR480h9fAV454JoLrWjkSD2fyTCnvYXj4ThOef85DNs//yDO4qM1+8rKGSByUxRXjUAmhV1QdNqnF0i/qYjG0RMjU1ssc1CdHCqKqj3yDBMAt6wXcPGgfUz4pP0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789666115; c=relaxed/simple; bh=3KM3iOXvw9bYk2gkTfddD9l8lkZQ88QND7QCNK5HMys=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kX09E/iwQi84K8GSbSugIvhrtnAqqITewjHSk9UpfPM/4duHSmIRiTLorwYkVVfnJBL9Kc6GhL/fICP5ptqrZNiJxmPN80ulYj+rp3757Rv6EaBCa4ibdVrBPJUk7nd6DK1CWCGpSmU3MDsDiDdmyeoTOh0Df1ob6IsXlLbmikI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YEH1dKi9; 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="YEH1dKi9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6881D1F000FF; Thu, 17 Sep 2026 17:28:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789666114; bh=uAN+lZA2qtfHYnGFcv8bg/YwGXj5+JtMBkkKNgP5Ji4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YEH1dKi9FYSeljNRJgUX2dbTeg46NLLWPqvZ42XymhnC1Sdmt9P900Sg5JkWwsr6H hrhSp7Rr+/7Fs/9CNG/hCN5ssOCPmbPBRvNeb0mnjIjsiKIk/UBavwAX8nYx6jwKwM vL6tJOZf95z0zGoX4A9Q719IZ8SXbFMmzerGDWwc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aamir Ahmed , Paolo Abeni , Sasha Levin Subject: [PATCH 6.18 0928/1250] net: hinic: fix mailbox segment buffer overflow Date: Thu, 17 Sep 2026 16:12:03 +0100 Message-ID: <20260917151617.164336558@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151551.901433442@linuxfoundation.org> References: <20260917151551.901433442@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aamir Ahmed [ Upstream commit 5d4d985957434867bbe85e4fa5e638f3e48ad522 ] check_mbox_seq_id_and_seg_len() validates that seq_id does not exceed SEQ_ID_MAX_VAL (42) and seg_len does not exceed MBOX_SEG_LEN (48). However, this allows the last segment (seq_id=42) to carry a full 48-byte payload, writing to offset 42*48=2016 for 48 bytes (ending at byte 2064). The receive buffer is only MBOX_MAX_BUF_SZ (2048) bytes, resulting in a 16-byte heap buffer overflow. The hinic3 driver already handles this correctly by defining MBOX_LAST_SEG_MAX_LEN and rejecting the last segment when it exceeds the remaining buffer space. Apply the same fix to the hinic driver. Fixes: a425b6e1c69b ("hinic: add mailbox function support") Signed-off-by: Aamir Ahmed Link: https://patch.msgid.link/AS8P251MB0001AE870B09020B46B5D7DBC8B22@AS8P251MB0001.EURP251.PROD.OUTLOOK.COM Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c index 97c1584dc05bc..1868a13588c00 100644 --- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c +++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c @@ -128,6 +128,7 @@ enum hinic_mbox_tx_status { #define SEQ_ID_START_VAL 0 #define SEQ_ID_MAX_VAL 42 +#define MBOX_LAST_SEG_MAX_LEN (MBOX_MAX_BUF_SZ - SEQ_ID_MAX_VAL * MBOX_SEG_LEN) #define NO_DMA_ATTRIBUTE_VAL 0 @@ -372,7 +373,8 @@ recv_pf_from_vf_mbox_handler(struct hinic_mbox_func_to_func *func_to_func, static bool check_mbox_seq_id_and_seg_len(struct hinic_recv_mbox *recv_mbox, u8 seq_id, u8 seg_len) { - if (seq_id > SEQ_ID_MAX_VAL || seg_len > MBOX_SEG_LEN) + if (seq_id > SEQ_ID_MAX_VAL || seg_len > MBOX_SEG_LEN || + (seq_id == SEQ_ID_MAX_VAL && seg_len > MBOX_LAST_SEG_MAX_LEN)) return false; if (seq_id == 0) { -- 2.53.0