Re: kern/49506: panic in bpf

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

n54%gmx.com@localhost wrote:
> If I remember correctly it was "bc" and it was triggered in one of the following cases:
> case BPF_MISC|BPF_COP:
> #ifdef _KERNEL
> if (pc->k < bc->nfuncs) {
> const bpf_copfunc_t fn = bc->copfuncs[pc->k];
> A = fn(bc, args, A);
> continue;
> }
> #endif
> return 0;
> case BPF_MISC|BPF_COPX:
> #ifdef _KERNEL
> if (X < bc->nfuncs) {
> const bpf_copfunc_t fn = bc->copfuncs[X];
> A = fn(bc, args, A);
> continue;
> }
> #endif

I wonder which filter program triggered it and whether it bypassed a
validation step somehow. When bc is NULL, filter programs with COP/COPX
shouldn't pass bpf_validate_ext().

Alex