Re: [PATCH net-next v1 2/2] bpf: Extend check_uarg_tail_zero() checks

On 08/07/2017 06:36 PM, Mickaël Salaün wrote: The function check_uarg_tail_zero() was created from bpf(2) for BPF_OBJ_GET_INFO_BY_FD without taking the access_ok() nor the PAGE_SIZE checks. Make this checks more generally available while unlikely to be triggered, extend the memory range check and

[PATCH net-next v1 2/2] bpf: Extend check_uarg_tail_zero() checks

The function check_uarg_tail_zero() was created from bpf(2) for BPF_OBJ_GET_INFO_BY_FD without taking the access_ok() nor the PAGE_SIZE checks. Make this checks more generally available while unlikely to be triggered, extend the memory range check and add an explanation including why the ToCToU sho