From f3e2c16cc2cc997e92863b27246fa72098d458a5 Mon Sep 17 00:00:00 2001
From: Duoming Zhou <duoming@zju.edu.cn>
Date: Fri, 8 Mar 2024 22:25:40 +0800
Subject: [PATCH 04/30] nfp: flower: handle acti_netdevs allocation failure
Git-commit: 84e95149bd341705f0eca6a7fcb955c548805002
Patch-mainline: v6.9-rc1
References: git-fixes
The kmalloc_array() in nfp_fl_lag_do_work() will return null, if
the physical memory has run out. As a result, if we dereference
the acti_netdevs, the null pointer dereference bugs will happen.
This patch adds a check to judge whether allocation failure occurs.
If it happens, the delayed work will be rescheduled and try again.
Fixes: bb9a8d031140 ("nfp: flower: monitor and offload LAG groups")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Link: https://lore.kernel.org/r/20240308142540.9674-1-duoming@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/netronome/nfp/flower/lag_conf.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
index 88d6d992e7d0..86db8e814140 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
@@ -338,6 +338,11 @@ static void nfp_fl_lag_do_work(struct work_struct *work)
acti_netdevs = kmalloc_array(entry->slave_cnt,
sizeof(*acti_netdevs), GFP_KERNEL);
+ if (!acti_netdevs) {
+ schedule_delayed_work(&lag->work,
+ NFP_FL_LAG_DELAY);
+ continue;
+ }
/* Include sanity check in the loop. It may be that a bond has
* changed between processing the last notification and the
--
2.16.4