Nicolai Buchwitz 9151d6c427 net: macb: copy shared skbs before appending the FCS ... macb_pad_and_fcs() appends the FCS in place when the skb has tailroom. A shared skb, as pktgen sends in clone_skb mode, grows by one FCS per transmit. BQL then completes more bytes than were queued and dql_completed() hits its BUG_ON. On a Raspberry Pi CM5 (RP1 GEM) pktgen with clone_skb 1000 burst 32 at 60 bytes kills the box within seconds. Copy shared skbs before appending the FCS. Clearing IFF_TX_SKB_SHARING would also fix it but makes pktgen refuse clone_skb on macb. Fixes: 653e92a917 ("net: macb: add support for padding and fcs computation") Signed-off-by: Nicolai Buchwitz <nb@tipi-net.de> Link: https://patch.msgid.link/20261006-nb-macb-shared-skb-net-v1-2-a80641479041@tipi-net.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2026-10-08 11:48:50 -07:00
..
Kconfig	ethernet: fix PTP_1588_CLOCK dependencies	2021-08-13 17:49:05 -07:00
macb_main.c	net: macb: copy shared skbs before appending the FCS	2026-10-08 11:48:50 -07:00
macb_pci.c	net: macb: unify device pointer naming convention	2026-08-17 17:19:55 -07:00
macb_ptp.c	net: macb: fix ordering around PTP timestamp read	2026-09-17 14:25:52 +02:00
macb.h	net: macb: exclude software FCS from TX byte statistics	2026-09-02 19:22:53 -07:00
Makefile