diff options
| -rw-r--r-- | kernel/bpf/cgroup.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index d2da5063d8f8..8fbc942a1cc3 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -1026,6 +1026,20 @@ static void replace_effective_prog(struct cgroup *cgrp, } } +static bool cgroup_bpf_storages_compatible(struct bpf_prog *old_prog, + struct bpf_prog *new_prog) +{ + enum bpf_cgroup_storage_type stype; + + for_each_cgroup_storage_type(stype) { + if (old_prog->aux->cgroup_storage[stype] != + new_prog->aux->cgroup_storage[stype]) + return false; + } + + return true; +} + /** * __cgroup_bpf_replace() - Replace link's program and propagate the change * to descendants @@ -1064,6 +1078,9 @@ static int __cgroup_bpf_replace(struct cgroup *cgrp, if (!found) return -ENOENT; + if (!cgroup_bpf_storages_compatible(link->link.prog, new_prog)) + return -EINVAL; + cgrp->bpf.revisions[atype] += 1; old_prog = xchg(&link->link.prog, new_prog); replace_effective_prog(cgrp, atype, pl); |