diff options
Diffstat (limited to 'kernel/bpf/bpf_iter.c')
| -rw-r--r-- | kernel/bpf/bpf_iter.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c index 931870f9cf56..2d4fbdbb194e 100644 --- a/kernel/bpf/bpf_iter.c +++ b/kernel/bpf/bpf_iter.c @@ -473,15 +473,16 @@ bool bpf_link_is_iter(struct bpf_link *link) return link->ops == &bpf_iter_link_lops; } -int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog) +int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, + struct bpf_prog *prog) { - union bpf_iter_link_info __user *ulinfo; struct bpf_link_primer link_primer; struct bpf_iter_target_info *tinfo; union bpf_iter_link_info linfo; struct bpf_iter_link *link; u32 prog_btf_id, linfo_len; bool existed = false; + bpfptr_t ulinfo; int err; if (attr->link_create.target_fd || attr->link_create.flags) @@ -489,18 +490,18 @@ int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog) memset(&linfo, 0, sizeof(union bpf_iter_link_info)); - ulinfo = u64_to_user_ptr(attr->link_create.iter_info); + ulinfo = make_bpfptr(attr->link_create.iter_info, uattr.is_kernel); linfo_len = attr->link_create.iter_info_len; - if (!ulinfo ^ !linfo_len) + if (bpfptr_is_null(ulinfo) ^ !linfo_len) return -EINVAL; - if (ulinfo) { + if (!bpfptr_is_null(ulinfo)) { err = bpf_check_uarg_tail_zero(ulinfo, sizeof(linfo), linfo_len); if (err) return err; linfo_len = min_t(u32, linfo_len, sizeof(linfo)); - if (copy_from_user(&linfo, ulinfo, linfo_len)) + if (copy_from_bpfptr(&linfo, ulinfo, linfo_len)) return -EFAULT; } |