diff options
Diffstat (limited to 'kernel/bpf/cgroup.c')
| -rw-r--r-- | kernel/bpf/cgroup.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index c2f0aa818b7a..08c1246c758e 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -1131,7 +1131,7 @@ int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level, goto out; } - if (ctx.optlen > max_optlen || ctx.optlen < 0) { + if (optval && (ctx.optlen > max_optlen || ctx.optlen < 0)) { ret = -EFAULT; goto out; } @@ -1145,8 +1145,11 @@ int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level, } if (ctx.optlen != 0) { - if (copy_to_user(optval, ctx.optval, ctx.optlen) || - put_user(ctx.optlen, optlen)) { + if (optval && copy_to_user(optval, ctx.optval, ctx.optlen)) { + ret = -EFAULT; + goto out; + } + if (put_user(ctx.optlen, optlen)) { ret = -EFAULT; goto out; } |