From: Lorenz Bauer <lmb@cloudflare.com>
Date: Fri, 13 Dec 2019 18:08:17 +0000
Subject: bpf: Clear skb->tstamp in bpf_redirect when necessary
Patch-mainline: v5.5-rc3
Git-commit: 5133498f4ad1123a5ffd4c08df6431dab882cc32
References: bsc#1155518
Redirecting a packet from ingress to egress by using bpf_redirect
breaks if the egress interface has an fq qdisc installed. This is the same
problem as fixed in 'commit 8203e2d844d3 ("net: clear skb->tstamp in forwarding paths")
Clear skb->tstamp when redirecting into the egress path.
Fixes: 80b14dee2bea ("net: Add a new socket option for a future transmit time.")
Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC")
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/bpf/20191213180817.2510-1-lmb@cloudflare.com
Acked-by: Gary Lin <glin@suse.com>
---
net/core/filter.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2055,6 +2055,7 @@ static inline int __bpf_tx_skb(struct ne
}
skb->dev = dev;
+ skb->tstamp = 0;
dev_xmit_recursion_inc();
ret = dev_queue_xmit(skb);