From: Li RongQing <lirongqing@xxxxxxxxx> [ Upstream commit 0a29275b6300f39f78a87f2038bbfe5bdbaeca47 ] 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@xxxxxxxxxxxxx> Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx> Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx> Link: https://lore.kernel.org/bpf/1578618277-18085-1-git-send-email-lirongqing@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/core/filter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/filter.c b/net/core/filter.c index 9daf1a4118b51..40b3af05c883c 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3207,7 +3207,7 @@ static int __bpf_tx_xdp_map(struct net_device *dev_rx, void *fwd, return err; } default: - break; + return -EBADRQC; } return 0; } -- 2.20.1
