diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-10-31 20:06:59 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-11-01 15:16:01 -0700 |
| commit | 41aa29a58b5f7f7be43f35372ef411f304a87a0d (patch) | |
| tree | b3f7fbeca17481c4310a2c77a294a0e591d38f68 | |
| parent | 8101e069418d136b995b3da81f1af72637082fda (diff) | |
| download | linux-41aa29a58b5f7f7be43f35372ef411f304a87a0d.tar.gz | |
net: cls_bpf: fix NULL deref on offload filter removal
Commit 401192113730 ("net: sched: refactor block offloads counter
usage") missed the fact that either new prog or old prog may be
NULL.
Fixes: 401192113730 ("net: sched: refactor block offloads counter usage")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sched/cls_bpf.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c index bf10bdaf5012..8229ed4a67be 100644 --- a/net/sched/cls_bpf.c +++ b/net/sched/cls_bpf.c @@ -162,16 +162,20 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog, cls_bpf.name = obj->bpf_name; cls_bpf.exts_integrated = obj->exts_integrated; - if (oldprog) + if (oldprog && prog) err = tc_setup_cb_replace(block, tp, TC_SETUP_CLSBPF, &cls_bpf, skip_sw, &oldprog->gen_flags, &oldprog->in_hw_count, &prog->gen_flags, &prog->in_hw_count, true); - else + else if (prog) err = tc_setup_cb_add(block, tp, TC_SETUP_CLSBPF, &cls_bpf, skip_sw, &prog->gen_flags, &prog->in_hw_count, true); + else + err = tc_setup_cb_destroy(block, tp, TC_SETUP_CLSBPF, &cls_bpf, + skip_sw, &oldprog->gen_flags, + &oldprog->in_hw_count, true); if (prog && err) { cls_bpf_offload_cmd(tp, oldprog, prog, extack); |