On Sat, Oct 03, 2015 at 12:57:49AM +0200, Daniel Borkmann wrote: > On 10/03/2015 12:44 AM, Tycho Andersen wrote: > >On Fri, Oct 02, 2015 at 02:10:24PM -0700, Kees Cook wrote: > ... > >Ok, how about, > > > >struct sock_filter insns[BPF_MAXINSNS]; > >insn_cnt = ptrace(PTRACE_SECCOMP_GET_FILTER, pid, insns, i); > > Would also be good that when the storage buffer (insns) is NULL, > it just returns you the number of sock_filter insns (or 0 when > nothing attached). > > That would be consistent with classic socket filters (see > sk_get_filter()), and user space could allocate a specific > size instead of always passing in max insns. Yep, the current set does this with SECCOMP_FD_DUMP and I agree that it's nice behavior, so I'll plan on preserving it. Thanks, Tycho -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
