On Fri, Apr 16, 2021 at 8:42 PM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Apr 16, 2021 at 08:32:20PM -0700, Alexei Starovoitov wrote: > > From: Alexei Starovoitov <ast@xxxxxxxxxx> > > > > Add bpf_sys_close() helper to be used by the syscall/loader program to close > > intermediate FDs and other cleanup. > > Conditional NAK. In a lot of contexts close_fd() is very much unsafe. > In particular, anything that might call it between fdget() and fdput() > is Right Fucking Out(tm). > In which contexts can that thing be executed? user context only. It's not for all of bpf _obviously_.
