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[lts-9.2] net/sched: cls_u32: Fix reference counter leak leading to overflow #274

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Merged
merged 1 commit into from
May 22, 2025
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[lts-9.2] net/sched: cls_u32: Fix reference counter leak leading to overflow #274

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18 changes: 10 additions & 8 deletions net/sched/cls_u32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -716,13 +716,19 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
struct nlattr *est, u32 flags, u32 fl_flags,
struct netlink_ext_ack *extack)
{
int err;
int err, ifindex = -1;

err = tcf_exts_validate_ex(net, tp, tb, est, &n->exts, flags,
fl_flags, extack);
if (err < 0)
return err;

if (tb[TCA_U32_INDEV]) {
ifindex = tcf_change_indev(net, tb[TCA_U32_INDEV], extack);
if (ifindex < 0)
return -EINVAL;
}

if (tb[TCA_U32_LINK]) {
u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
struct tc_u_hnode *ht_down = NULL, *ht_old;
Expand Down Expand Up @@ -757,13 +763,9 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
tcf_bind_filter(tp, &n->res, base);
}

if (tb[TCA_U32_INDEV]) {
int ret;
ret = tcf_change_indev(net, tb[TCA_U32_INDEV], extack);
if (ret < 0)
return -EINVAL;
n->ifindex = ret;
}
if (ifindex >= 0)
n->ifindex = ifindex;

return 0;
}

Expand Down