From ded8b9c761c50d147b20d7de18766fcdb8f5b621 Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Fri, 27 Apr 2018 15:08:41 +0100
Subject: sfc: Use filter index rather than ID for rps_flow_id table
efx->type->filter_insert() returns an ID rather than the index that
efx->type->filter_async_insert() used to, which causes it to exceed
efx->type->max_rx_ip_filters on some EF10 configurations, leading to out-
of-bounds array writes.
So, in efx_filter_rfs_work(), convert this back into an index (which is
what the remove call in the expiry path expects, anyway).
Fixes: 3af0f34290f6 ("sfc: replace asynchronous filter operations")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/sfc/rx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 64a94f242027..d2e254f2f72b 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -839,6 +839,8 @@ static void efx_filter_rfs_work(struct work_struct *data)
int rc;
rc = efx->type->filter_insert(efx, &req->spec, true);
+ if (rc >= 0)
+ rc %= efx->type->max_rx_ip_filters;
if (efx->rps_hash_table) {
spin_lock_bh(&efx->rps_hash_lock);
rule = efx_rps_hash_find(efx, &req->spec);
--
cgit v1.2.2
From 987c658a61f432804c4662b736dbd5fc5939af1f Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Fri, 27 Apr 2018 15:08:57 +0100
Subject: sfc: fix ARFS expiry check on EF10
Owing to a missing conditional, the result of rps_may_expire_flow() was
being ignored and filters were being removed even if we'd decided not to
expire them.
Fixes: f8d6203780b7 ("sfc: ARFS filter IDs")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/sfc/ef10.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 63036d9bf3e6..d90a7b1f4088 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -4784,8 +4784,9 @@ expire:
* will set rule->filter_id to EFX_ARFS_FILTER_ID_PENDING, meaning that
* the rule is not removed by efx_rps_hash_del() below.
*/
- ret = efx_ef10_filter_remove_internal(efx, 1U << spec->priority,
- filter_idx, true) == 0;
+ if (ret)
+ ret = efx_ef10_filter_remove_internal(efx, 1U << spec->priority,
+ filter_idx, true) == 0;
/* While we can't safely dereference rule (we dropped the lock), we can
* still test it for NULL.
*/
--
cgit v1.2.2