Re: [PATCH bpf 0/2] bpf fix for mixed tail calls and subprograms

On 6/9/21 9:17 AM, John Fastabend wrote:

Yonghong Song wrote:

quoted

On 6/8/21 12:29 PM, John Fastabend wrote:

quoted

We recently tried to use mixed programs that have both tail calls and
subprograms, but it needs the attached fix. Also added a small test
addition that will cause the failure without the fix.

Thanks,
John

---

John Fastabend (2):
        bpf: Fix null ptr deref with mixed tail calls and subprogs
        bpf: selftest to verify mixing bpf2bpf calls and tailcalls with insn patch


   .../selftests/bpf/progs/tailcall_bpf2bpf4.c     | 17 +++++++++++++++++
   1 file changed, 17 insertions(+)

Don't know what happens. Apparently, the first patch made changes
in kernel/bpf/verifier.c, but it didn't show up in the above.

Agh its how I applied the patches and cover-letter :/ I moved them between
trees (bpf-next -> bpf) and lost the diff. I can resubmit if anyone
cares.

You don't need to resubmit just because of this. This cover letter
may not be merged eventually.