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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-08-19 21:36:54 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-23 02:02:31 +0200 |
| commit | b9a24bb76bf611a5268ceffe04219e6ad264559b (patch) | |
| tree | 78aefca9f8e4da33abea28a0ff61fbc59fd2c66d /net/sched/cls_bpf.c | |
| parent | Revert "l2tp: Refactor the codes with existing macros instead of literal number" (diff) | |
| download | linux-b9a24bb76bf611a5268ceffe04219e6ad264559b.tar.xz linux-b9a24bb76bf611a5268ceffe04219e6ad264559b.zip | |
net_sched: properly handle failure case of tcf_exts_init()
After commit 22dc13c837c3 ("net_sched: convert tcf_exts from list to pointer array")
we do dynamic allocation in tcf_exts_init(), therefore we need
to handle the ENOMEM case properly.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_bpf.c')
| -rw-r--r-- | net/sched/cls_bpf.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c index c3002c2c68bb..4742f415ee5b 100644 --- a/net/sched/cls_bpf.c +++ b/net/sched/cls_bpf.c @@ -311,17 +311,19 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp, if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf)) return -EINVAL; - tcf_exts_init(&exts, TCA_BPF_ACT, TCA_BPF_POLICE); - ret = tcf_exts_validate(net, tp, tb, est, &exts, ovr); + ret = tcf_exts_init(&exts, TCA_BPF_ACT, TCA_BPF_POLICE); if (ret < 0) return ret; + ret = tcf_exts_validate(net, tp, tb, est, &exts, ovr); + if (ret < 0) + goto errout; if (tb[TCA_BPF_FLAGS]) { u32 bpf_flags = nla_get_u32(tb[TCA_BPF_FLAGS]); if (bpf_flags & ~TCA_BPF_FLAG_ACT_DIRECT) { - tcf_exts_destroy(&exts); - return -EINVAL; + ret = -EINVAL; + goto errout; } have_exts = bpf_flags & TCA_BPF_FLAG_ACT_DIRECT; @@ -331,10 +333,8 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp, ret = is_bpf ? cls_bpf_prog_from_ops(tb, prog) : cls_bpf_prog_from_efd(tb, prog, tp); - if (ret < 0) { - tcf_exts_destroy(&exts); - return ret; - } + if (ret < 0) + goto errout; if (tb[TCA_BPF_CLASSID]) { prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]); @@ -343,6 +343,10 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp, tcf_exts_change(tp, &prog->exts, &exts); return 0; + +errout: + tcf_exts_destroy(&exts); + return ret; } static u32 cls_bpf_grab_new_handle(struct tcf_proto *tp, @@ -388,7 +392,9 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb, if (!prog) return -ENOBUFS; - tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE); + ret = tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE); + if (ret < 0) + goto errout; if (oldprog) { if (handle && oldprog->handle != handle) { @@ -420,9 +426,10 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb, *arg = (unsigned long) prog; return 0; + errout: + tcf_exts_destroy(&prog->exts); kfree(prog); - return ret; } |