This is a note to let you know that I've just added the patch titled
ixgbe: Fix NULL pointer dereference in ethtool loopback test
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ixgbe-fix-null-pointer-dereference-in-ethtool-loopback-test.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 31166efb1cee348eb6314e9c0095d84cbeb66b9d Mon Sep 17 00:00:00 2001
From: Alexander Duyck <alexanderduyck@xxxxxx>
Date: Mon, 8 Mar 2021 12:41:56 -0800
Subject: ixgbe: Fix NULL pointer dereference in ethtool loopback test
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From: Alexander Duyck <alexanderduyck@xxxxxx>
commit 31166efb1cee348eb6314e9c0095d84cbeb66b9d upstream.
The ixgbe driver currently generates a NULL pointer dereference when
performing the ethtool loopback test. This is due to the fact that there
isn't a q_vector associated with the test ring when it is setup as
interrupts are not normally added to the test rings.
To address this I have added code that will check for a q_vector before
returning a napi_id value. If a q_vector is not present it will return a
value of 0.
Fixes: b02e5a0ebb17 ("xsk: Propagate napi_id to XDP socket Rx path")
Signed-off-by: Alexander Duyck <alexanderduyck@xxxxxx>
Acked-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
Tested-by: Dave Switzer <david.switzer@xxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6540,6 +6540,13 @@ err_setup_tx:
return err;
}
+static int ixgbe_rx_napi_id(struct ixgbe_ring *rx_ring)
+{
+ struct ixgbe_q_vector *q_vector = rx_ring->q_vector;
+
+ return q_vector ? q_vector->napi.napi_id : 0;
+}
+
/**
* ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
* @adapter: pointer to ixgbe_adapter
@@ -6587,7 +6594,7 @@ int ixgbe_setup_rx_resources(struct ixgb
/* XDP RX-queue info */
if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
- rx_ring->queue_index, rx_ring->q_vector->napi.napi_id) < 0)
+ rx_ring->queue_index, ixgbe_rx_napi_id(rx_ring)) < 0)
goto err;
rx_ring->xdp_prog = adapter->xdp_prog;
Patches currently in stable-queue which might be from alexanderduyck@xxxxxx are
queue-5.11/ixgbe-fix-null-pointer-dereference-in-ethtool-loopback-test.patch
