[PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc

[PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc

[Pedro Tammela]

Smatch reports that 'ci' can be used uninitialized.
The current code ignores errno coming from tcf_idr_check_alloc, which
will lead to the incorrect usage of 'ci'. Handle the errno as it should.

Fixes: 288864effe33 ("net/sched: act_connmark: transition to percpu stats and rcu")
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
---
 net/sched/act_connmark.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/sched/act_connmark.c b/net/sched/act_connmark.c
index 8dabfb52ea3d..0d7aee8933c5 100644
--- a/net/sched/act_connmark.c
+++ b/net/sched/act_connmark.c
@@ -158,6 +158,9 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
 		nparms->zone = parm->zone;
 
 		ret = 0;
+	} else {
+		err = ret;
+		goto out_free;
 	}
 
 	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
-- 
2.34.1

Re: [PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc

[Simon Horman]

On Mon, Feb 27, 2023 at 12:23:52PM -0300, Pedro Tammela wrote:
> Smatch reports that 'ci' can be used uninitialized.
> The current code ignores errno coming from tcf_idr_check_alloc, which
> will lead to the incorrect usage of 'ci'. Handle the errno as it should.
> 
> Fixes: 288864effe33 ("net/sched: act_connmark: transition to percpu stats and rcu")
> Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>

Thanks Pedro,

looks good to me.

Reviewed-by: Simon Horman <simon.horman@corigine.com>

Re: [PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@davemloft.net>:

On Mon, 27 Feb 2023 12:23:52 -0300 you wrote:
> Smatch reports that 'ci' can be used uninitialized.
> The current code ignores errno coming from tcf_idr_check_alloc, which
> will lead to the incorrect usage of 'ci'. Handle the errno as it should.
> 
> Fixes: 288864effe33 ("net/sched: act_connmark: transition to percpu stats and rcu")
> Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
> 
> [...]

Here is the summary with links:
  - [net,v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc
    https://git.kernel.org/netdev/net/c/fb07390463c9

You are awesome, thank you!
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