diff options
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 32761be48143..04010a5e2ddb 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -363,9 +363,15 @@ const struct bpf_func_proto bpf_jiffies64_proto = { #ifdef CONFIG_CGROUPS BPF_CALL_0(bpf_get_current_cgroup_id) { - struct cgroup *cgrp = task_dfl_cgroup(current); + struct cgroup *cgrp; + u64 cgrp_id; - return cgroup_id(cgrp); + rcu_read_lock(); + cgrp = task_dfl_cgroup(current); + cgrp_id = cgroup_id(cgrp); + rcu_read_unlock(); + + return cgrp_id; } const struct bpf_func_proto bpf_get_current_cgroup_id_proto = { @@ -376,13 +382,17 @@ const struct bpf_func_proto bpf_get_current_cgroup_id_proto = { BPF_CALL_1(bpf_get_current_ancestor_cgroup_id, int, ancestor_level) { - struct cgroup *cgrp = task_dfl_cgroup(current); + struct cgroup *cgrp; struct cgroup *ancestor; + u64 cgrp_id; + rcu_read_lock(); + cgrp = task_dfl_cgroup(current); ancestor = cgroup_ancestor(cgrp, ancestor_level); - if (!ancestor) - return 0; - return cgroup_id(ancestor); + cgrp_id = ancestor ? cgroup_id(ancestor) : 0; + rcu_read_unlock(); + + return cgrp_id; } const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto = { |