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net: core: devlink: use right genl user_ptr when handling port param get/set

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commit 7e238de828 upstream.

Fix incorrect user_ptr dereferencing when handling port param get/set:

    idx [0] stores the 'struct devlink' pointer;
    idx [1] stores the 'struct devlink_port' pointer;

Fixes: 637989b5d7 ("devlink: Always use user_ptr[0] for devlink and simplify post_doit")
CC: Parav Pandit <parav@mellanox.com>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Link: https://lore.kernel.org/r/20210119085333.16833-1-vadym.kochan@plvision.eu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleksandr Mazur 2021-01-19 10:53:33 +02:00 committed by Greg Kroah-Hartman
parent 6a791693a0
commit 22c3cb558a
1 changed files with 2 additions and 2 deletions
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4
net/core/devlink.c
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@ -4134,7 +4134,7 @@ static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink_port *devlink_port = info->user_ptr[1];
struct devlink_param_item *param_item;
struct sk_buff *msg;
int err;
@ -4163,7 +4163,7 @@ static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink_port *devlink_port = info->user_ptr[1];
return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
devlink_port->index,