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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: dxlWeDY6JRnf0PeonfgD5S8Flk72Q6uBMzLW4puFhfSBcPz8+j08tdx7m+6ZN6tdSNHUT30MJR6GoNiNIWNj4VKPVWAZ2eV0tWbo8dUdxJxDwo4qliePZmMjpKu1l+5lKuPsHCaliAOXxNK+qeZo8RSUKVGMN9YQRLZUEK9Cbf4xogwCzr8FOp4DRo1yV07Ewyg/AZeK4HRW7WXc0rufEA2qYuqz63RmkVIheSHbJa+7vRjjFNQc/t4Ho8qXJNyUhy+fQZolbJZRW2fV36Xqsv1qffk0RlDiNGvIqtQ+QckcPcnjFpEtNT6mP2OPO+JNsw/pwtJRZnqvU+n49rV64Cf/LdzFv8aGOGEBFYdPdNNPLCpR4WNL2Pj+dtYo63IuGVYFIs2QMJKGapTo0YhAA5NzRgl6YI34EJI505HN40mxYKSvnB9mTkp+4Bokzzb3 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2026 07:57:39.1563 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 78a75ff0-443e-40bf-02ad-08dee30fe82c X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[4.158.2.129]; Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AM4PEPF00027A60.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBBPR08MB10651 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean On 15/07/2026 10:42, Weijie Gao wrote: > LwIP may pass a packet to the netif linkoutput callback as a chain > of pbufs. In this case, p->len only describes the length of the > first pbuf, while p->tot_len describes the length of the whole > packet. > > The current transmit path only sends the first pbuf. This can > truncate packets whose headers have already been generated for the > full packet length, resulting in malformed frames on the wire. > For example, the IP header may record a larger total length than the > actual Ethernet frame length. > > Assemble chained pbufs into one aligned contiguous buffer before > passing the packet to the Ethernet driver. > > Fixes: 98ad145db61a (net: lwip: add DHCP support and dhcp commmand) > Signed-off-by: Weijie Gao Good catch! That was a big oversight :-/ thanks for the fix. Reviewed-by: Jerome Forissier -- Jerome