* [PATCH bpf] xsk: re-add queue id check for XDP_SKB path
@ 2018-06-12 10:02 Björn Töpel
2018-06-12 10:21 ` Daniel Borkmann
0 siblings, 1 reply; 2+ messages in thread
From: Björn Töpel @ 2018-06-12 10:02 UTC (permalink / raw)
To: magnus.karlsson, magnus.karlsson, ast, daniel, netdev
Cc: Björn Töpel, qi.z.zhang
From: Björn Töpel <bjorn.topel@intel.com>
Commit 173d3adb6f43 ("xsk: add zero-copy support for Rx") introduced a
regression on the XDP_SKB receive path, when the queue id checks were
removed. Now, they are back again.
Fixes: 173d3adb6f43 ("xsk: add zero-copy support for Rx")
Reported-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
net/xdp/xsk.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 36919a254ba3..3b3410ada097 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -118,6 +118,9 @@ int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
u64 addr;
int err;
+ if (xs->dev != xdp->rxq->dev || xs->queue_id != xdp->rxq->queue_index)
+ return -EINVAL;
+
if (!xskq_peek_addr(xs->umem->fq, &addr) ||
len > xs->umem->chunk_size_nohr) {
xs->rx_dropped++;
--
2.14.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH bpf] xsk: re-add queue id check for XDP_SKB path
2018-06-12 10:02 [PATCH bpf] xsk: re-add queue id check for XDP_SKB path Björn Töpel
@ 2018-06-12 10:21 ` Daniel Borkmann
0 siblings, 0 replies; 2+ messages in thread
From: Daniel Borkmann @ 2018-06-12 10:21 UTC (permalink / raw)
To: Björn Töpel, magnus.karlsson, magnus.karlsson, ast, netdev
Cc: Björn Töpel, qi.z.zhang
On 06/12/2018 12:02 PM, Björn Töpel wrote:
> From: Björn Töpel <bjorn.topel@intel.com>
>
> Commit 173d3adb6f43 ("xsk: add zero-copy support for Rx") introduced a
> regression on the XDP_SKB receive path, when the queue id checks were
> removed. Now, they are back again.
>
> Fixes: 173d3adb6f43 ("xsk: add zero-copy support for Rx")
> Reported-by: Qi Zhang <qi.z.zhang@intel.com>
> Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Applied to bpf, thanks Björn!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-06-12 10:02 [PATCH bpf] xsk: re-add queue id check for XDP_SKB path Björn Töpel
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