diff options
Diffstat (limited to 'kernel/bpf/bpf_iter.c')
| -rw-r--r-- | kernel/bpf/bpf_iter.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c index d5d96ceca105..7e8fd49406f6 100644 --- a/kernel/bpf/bpf_iter.c +++ b/kernel/bpf/bpf_iter.c @@ -723,9 +723,6 @@ const struct bpf_func_proto bpf_for_each_map_elem_proto = { .arg4_type = ARG_ANYTHING, }; -/* maximum number of loops */ -#define MAX_LOOPS BIT(23) - BPF_CALL_4(bpf_loop, u32, nr_loops, void *, callback_fn, void *, callback_ctx, u64, flags) { @@ -733,9 +730,13 @@ BPF_CALL_4(bpf_loop, u32, nr_loops, void *, callback_fn, void *, callback_ctx, u64 ret; u32 i; + /* Note: these safety checks are also verified when bpf_loop + * is inlined, be careful to modify this code in sync. See + * function verifier.c:inline_bpf_loop. + */ if (flags) return -EINVAL; - if (nr_loops > MAX_LOOPS) + if (nr_loops > BPF_MAX_LOOPS) return -E2BIG; for (i = 0; i < nr_loops; i++) { |