bpf, mlx5: fix mlx5e_create_rq taking reference on prog

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In mlx5e_create_rq(), when creating a new queue, we call bpf_prog_add() but
without checking the return value. bpf_prog_add() can fail since 92117d8443
("bpf: fix refcnt overflow"), so we really must check it. Take the reference
right when we assign it to the rq from priv->xdp_prog, and just drop the
reference on error path. Destruction in mlx5e_destroy_rq() looks good, though.

Fixes: 86994156c7 ("net/mlx5e: XDP fast RX drop bpf programs support")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Daniel Borkmann 2016-11-19 01:45:00 +01:00 • committed by David S. Miller

parent f81a8a02bb

commit 97bc402db7

2 changed files with 10 additions and 4 deletions

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13

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

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1

kernel/bpf/syscall.c

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