On Wed, Mar 09, 2022 at 08:33:20PM +0800, Hou Tao wrote:
> It is the bpf_jit_harden counterpart to commit 60b58afc96c9 ("bpf: fix
> net.core.bpf_jit_enable race"). bpf_jit_harden will be tested twice
> for each subprog if there are subprogs in bpf program and constant
> blinding may increase the length of program, so when running
> "./test_progs -t subprogs" and toggling bpf_jit_harden between 0 and 2,
> jit_subprogs may fail because constant blinding increases the length
> of subprog instructions during extra passs.
>
> So cache the value of bpf_jit_blinding_enabled() during program
> allocation, and use the cached value during constant blinding, subprog
> JITing and args tracking of tail call.
Looks like this patch alone is enough.
With race fixed. Patches 1 and 2 are no longer necessary, right?
