From: Wang Yufen wangyufen@huawei.com
[ Upstream commit 2b88974ecb358990e1c33fabcd0b9e142bab7f21 ]
Fault injection test reports this issue:
kernel BUG at net/core/dev.c:10731! invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI Call Trace: <TASK> wilc_netdev_ifc_init+0x19f/0x220 [wilc1000 884bf126e9e98af6a708f266a8dffd53f99e4bf5] wilc_cfg80211_init+0x30c/0x380 [wilc1000 884bf126e9e98af6a708f266a8dffd53f99e4bf5] wilc_bus_probe+0xad/0x2b0 [wilc1000_spi 1520a7539b6589cc6cde2ae826a523a33f8bacff] spi_probe+0xe4/0x140 really_probe+0x17e/0x3f0 __driver_probe_device+0xe3/0x170 driver_probe_device+0x49/0x120
The root case here is alloc_ordered_workqueue() fails, but cfg80211_unregister_netdevice() or unregister_netdev() not be called in error handling path. To fix add unregister_netdev goto lable to add the unregister operation in error handling path.
Fixes: 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to "NETDEV-wq"") Signed-off-by: Wang Yufen wangyufen@huawei.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://lore.kernel.org/r/1669289902-23639-1-git-send-email-wangyufen@huawei... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/microchip/wilc1000/netdev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c index 6f3ae0dff77ce..e9f59de31b0b9 100644 --- a/drivers/net/wireless/microchip/wilc1000/netdev.c +++ b/drivers/net/wireless/microchip/wilc1000/netdev.c @@ -981,7 +981,7 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name, ndev->name); if (!wl->hif_workqueue) { ret = -ENOMEM; - goto error; + goto unregister_netdev; }
ndev->needs_free_netdev = true; @@ -996,6 +996,11 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
return vif;
+unregister_netdev: + if (rtnl_locked) + cfg80211_unregister_netdevice(ndev); + else + unregister_netdev(ndev); error: free_netdev(ndev); return ERR_PTR(ret);