| Message ID | 20200503030925.33060-1-edumazet@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | [net] net_sched: sch_skbprio: add message validation to skbprio_change() | expand |
diff --git a/net/sched/sch_skbprio.c b/net/sched/sch_skbprio.c index 0fb10abf757962c1e3e6feb8c68dedd9a1808f1b..7a5e4c454715617cb57c6db7de7fdaa9e6886d40 100644 --- a/net/sched/sch_skbprio.c +++ b/net/sched/sch_skbprio.c @@ -169,6 +169,9 @@ static int skbprio_change(struct Qdisc *sch, struct nlattr *opt, { struct tc_skbprio_qopt *ctl = nla_data(opt); + if (opt->nla_len != nla_attr_size(sizeof(*ctl))) + return -EINVAL; + sch->limit = ctl->limit; return 0; }
Do not assume the attribute has the right size. Fixes: aea5f654e6b7 ("net/sched: add skbprio scheduler") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> --- net/sched/sch_skbprio.c | 3 +++ 1 file changed, 3 insertions(+)