[PATCH 6.1 50/69] net: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup

Greg Kroah-Hartman
2026-02-09T14:44:04Z

From: Zilin Guan <zilin@seu.edu.cn>

[ Upstream commit 8558aef4e8a1a83049ab906d21d391093cfa7e7f ]

In setup_nic_devices(), the initialization loop jumps to the label
setup_nic_dev_free on failure. The current cleanup loop while(i--)
skip the failing index i, causing a memory leak.

Fix this by changing the loop to iterate from the current index i
down to 0.

Also, decrement i in the devlink_alloc failure path to point to the
last successfully allocated index.

Compile tested only. Issue found using code review.

Fixes: f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters")
Suggested-by: Simon Horman <horms@kernel.org>
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20260128154440.278369-3-zilin@seu.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/cavium/liquidio/lio_main.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index f27393c84ba48..131996fd5406f 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -3770,6 +3770,7 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
if (!devlink) {
device_unlock(&octeon_dev->pci_dev->dev);
dev_err(&octeon_dev->pci_dev->dev, "devlink alloc failed\n");
+ i--;
goto setup_nic_dev_free;
}

@@ -3785,11 +3786,11 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)

setup_nic_dev_free:

- while (i--) {
+ do {
dev_err(&octeon_dev->pci_dev->dev,
"NIC ifidx:%d Setup failed\n", i);
liquidio_destroy_nic_device(octeon_dev, i);
- }
+ } while (i--);

setup_nic_dev_done:

--
2.51.0