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| author | Jeremy Kerr <jk@codeconstruct.com.au> | 2025-11-25 14:48:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-07 06:27:32 +0900 |
| commit | d5796cf53b0802ea60eb2aa9b84ee7aa8ba18350 (patch) | |
| tree | 1c3412a2cf2ec5f353d4869cd2ec8b96e546668b /net | |
| parent | 64e47cd1fd631a21bf5a630cebefec6c8fc381cd (diff) | |
| download | linux-d5796cf53b0802ea60eb2aa9b84ee7aa8ba18350.tar.gz linux-d5796cf53b0802ea60eb2aa9b84ee7aa8ba18350.tar.bz2 linux-d5796cf53b0802ea60eb2aa9b84ee7aa8ba18350.zip | |
net: mctp: unconditionally set skb->dev on dst output
[ Upstream commit b3e528a5811bbc8246dbdb962f0812dc9b721681 ]
On transmit, we are currently relying on skb->dev being set by
mctp_local_output() when we first set up the skb destination fields.
However, forwarded skbs do not use the local_output path, so will retain
their incoming netdev as their ->dev on tx. This does not work when
we're forwarding between interfaces.
Set skb->dev unconditionally in the transmit path, to allow for proper
forwarding.
We keep the skb->dev initialisation in mctp_local_output(), as we use it
for fragmentation.
Fixes: 269936db5eb3 ("net: mctp: separate routing database from routing operations")
Suggested-by: Vince Chang <vince_chang@aspeedtech.com>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://patch.msgid.link/20251125-dev-forward-v1-1-54ecffcd0616@codeconstruct.com.au
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mctp/route.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mctp/route.c b/net/mctp/route.c index 4d314e062ba9..2ac4011a953f 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -623,6 +623,7 @@ static int mctp_dst_output(struct mctp_dst *dst, struct sk_buff *skb) skb->protocol = htons(ETH_P_MCTP); skb->pkt_type = PACKET_OUTGOING; + skb->dev = dst->dev->dev; if (skb->len > dst->mtu) { kfree_skb(skb); |