diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-03-01 03:20:59 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-03-01 03:20:59 +0100 |
| commit | f0378fa54b56755cf982eb517a009fb3dcf89ae5 (patch) | |
| tree | db1445d8c637edb029366ced465a5466112fe838 | |
| parent | 1afe753f75f1e64254c8e29c4c2030e25fa95392 (diff) | |
libbpf: avoid aborting on unknown instruction
Userland might load BPF programs with unknown instructions, we currently
don't pre-check against that. In such a case, we shouldn't make netdde
completely abort, and rather just return 0 like e.g. in the division by
zero case.
| -rw-r--r-- | libbpf/bpf_impl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libbpf/bpf_impl.c b/libbpf/bpf_impl.c index acd53409..c78176c2 100644 --- a/libbpf/bpf_impl.c +++ b/libbpf/bpf_impl.c @@ -85,7 +85,8 @@ bpf_do_filter(net_rcv_port_t infp, char *p, unsigned int wirelen, switch (pc->code) { default: - abort(); + // Unknown instruction, abort + return 0; case BPF_RET|BPF_K: if (infp->rcv_port == MACH_PORT_NULL && *entpp == 0) { |