bpf: Return -EBADRQC for invalid map type in __bpf_tx_xdp_map
[ Upstream commit 0a29275b63
]
A negative value should be returned if map->map_type is invalid
although that is impossible now, but if we run into such situation
in future, then xdpbuff could be leaked.
Daniel Borkmann suggested:
-EBADRQC should be returned to stay consistent with generic XDP
for the tracepoint output and not to be confused with -EOPNOTSUPP
from other locations like dev_map_enqueue() when ndo_xdp_xmit is
missing and such.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/1578618277-18085-1-git-send-email-lirongqing@baidu.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
be1113b4b4
commit
76fac0e735
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@ -3543,7 +3543,7 @@ static int __bpf_tx_xdp_map(struct net_device *dev_rx, void *fwd,
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return err;
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}
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default:
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break;
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return -EBADRQC;
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}
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return 0;
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}
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