[PATCH net] mlxsw: core_linecards: Fix double memory deallocation in case of invalid INI file

From: Aleksandr Mishin
Date: Tue Jul 02 2024 - 06:36:10 EST


In case of invalid INI file mlxsw_linecard_types_init() deallocates memory
but doesn't reset pointer to NULL and returns 0. In case of any error
occured after mlxsw_linecard_types_init() call, mlxsw_linecards_init()
calls mlxsw_linecard_types_fini() which perform memory deallocation again.

Add pointer reset to NULL.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: b217127e5e4e ("mlxsw: core_linecards: Add line card objects and implement provisioning")
Signed-off-by: Aleksandr Mishin <amishin@xxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlxsw/core_linecards.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c b/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
index 025e0db983fe..b032d5a4b3b8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_linecards.c
@@ -1484,6 +1484,7 @@ static int mlxsw_linecard_types_init(struct mlxsw_core *mlxsw_core,
vfree(types_info->data);
err_data_alloc:
kfree(types_info);
+ linecards->types_info = NULL;
return err;
}

--
2.30.2