On 16/07/2026 09:56, Jerome Forissier wrote: > 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 <[email protected]> > > Good catch! That was a big oversight :-/ thanks for the fix. > > Reviewed-by: Jerome Forissier <[email protected]> >
...and applied to u-boot-net/for-master. -- Jerome
