From: Wang Yufen <wangyufen@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1669289902-23639-1-git-send-email-wangyufen@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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);
--
2.39.2
