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