net/cnxk: fix aged flows query
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Commit Message
From: Satheesh Paul <psatheesh@marvell.com>
After all aged flows are destroyed, the aged_flows bitmap
is free-ed. Querying aged flows tries to access this bitmap
resulting in a segmentation fault. Fixing this by not accessing
the bitmap if no aged flows are present.
Fixes: 357f5ebc8a24 ("common/cnxk: support flow aging")
Cc: stable@dpdk.org
Signed-off-by: Satheesh Paul <psatheesh@marvell.com>
Reviewed-by: Kiran Kumar K <kirankumark@marvell.com>
---
drivers/common/cnxk/roc_npc_aging.c | 4 ++++
drivers/net/cnxk/cnxk_flow.c | 3 +++
2 files changed, 7 insertions(+)
Comments
On Fri, Feb 2, 2024 at 10:51 AM <psatheesh@marvell.com> wrote:
>
> From: Satheesh Paul <psatheesh@marvell.com>
>
> After all aged flows are destroyed, the aged_flows bitmap
> is free-ed. Querying aged flows tries to access this bitmap
> resulting in a segmentation fault. Fixing this by not accessing
> the bitmap if no aged flows are present.
>
> Fixes: 357f5ebc8a24 ("common/cnxk: support flow aging")
> Cc: stable@dpdk.org
>
> Signed-off-by: Satheesh Paul <psatheesh@marvell.com>
> Reviewed-by: Kiran Kumar K <kirankumark@marvell.com>
Applied to dpdk-next-net-mrvl/for-main. Thanks
@@ -234,8 +234,11 @@ npc_age_flow_list_entry_delete(struct roc_npc *roc_npc,
{
struct npc *npc = roc_npc_to_npc_priv(roc_npc);
struct npc_age_flow_list_head *list;
+ struct roc_npc_flow_age *flow_age;
struct npc_age_flow_entry *curr;
+ flow_age = &roc_npc->flow_age;
+
list = &npc->age_flow_list;
curr = TAILQ_FIRST(list);
@@ -244,6 +247,7 @@ npc_age_flow_list_entry_delete(struct roc_npc *roc_npc,
while (curr) {
if (flow->mcam_id == curr->flow->mcam_id) {
+ plt_bitmap_clear(flow_age->aged_flows, flow->mcam_id);
TAILQ_REMOVE(list, curr, next);
plt_free(curr);
break;
@@ -616,6 +616,9 @@ cnxk_flow_get_aged_flows(struct rte_eth_dev *eth_dev, void **context,
flow_age = &roc_npc->flow_age;
+ if (!flow_age->age_flow_refcnt)
+ return 0;
+
do {
sn = plt_seqcount_read_begin(&flow_age->seq_cnt);