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| author | Duoming Zhou <duoming@zju.edu.cn> | 2024-03-08 22:25:40 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-26 18:22:37 -0400 |
| commit | d746889db75a76aeee95fb705b8e1ac28c684a2e (patch) | |
| tree | e0b04c093838018e64943ce1c276f450a16c142c | |
| parent | 7089428a1a4e28efa0c36877d80639a8306fdbf4 (diff) | |
| download | linux-stable-d746889db75a76aeee95fb705b8e1ac28c684a2e.tar.gz linux-stable-d746889db75a76aeee95fb705b8e1ac28c684a2e.tar.bz2 linux-stable-d746889db75a76aeee95fb705b8e1ac28c684a2e.zip | |
nfp: flower: handle acti_netdevs allocation failure
[ Upstream commit 84e95149bd341705f0eca6a7fcb955c548805002 ]
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: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/flower/lag_conf.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c index bf10598f66ae..1b5e0cef9771 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c +++ b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c @@ -336,6 +336,11 @@ 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 |