net/mlx5e: RX, Fix generating skb from non-linear xdp_buff for legacy RQ

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XDP programs can release xdp_buff fragments when calling
bpf_xdp_adjust_tail(). The driver currently assumes the number of
fragments to be unchanged and may generate skb with wrong truesize or
containing invalid frags. Fix the bug by generating skb according to
xdp_buff after the XDP program runs.

Fixes: ea5d49bdae ("net/mlx5e: Add XDP multi buffer support to the non-linear legacy RQ")
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Amery Hung <ameryhung@gmail.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1760644540-899148-2-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Amery Hung 2025-10-16 22:55:39 +03:00 • committed by Jakub Kicinski

parent a73ca0449b

commit afd5ba577c

1 changed files with 19 additions and 6 deletions

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drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

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