tree cd25234c8e4096105993a9b4432d1f13ca59c044
parent 3e2671fb9a95d2b46990832466383ec8384d88a3
author Andrii Nakryiko <andriin@fb.com> 1584120214 -0700
committer Daniel Borkmann <daniel@iogearbox.net> 1584138653 +0100

libbpf: Ignore incompatible types with matching name during CO-RE relocation

When finding target type candidates, ignore forward declarations, functions,
and other named types of incompatible kind. Not doing this can cause false
errors.  See [0] for one such case (due to struct pt_regs forward
declaration).

  [0] https://github.com/iovisor/bcc/pull/2806#issuecomment-598543645

Fixes: ddc7c3042614 ("libbpf: implement BPF CO-RE offset relocation algorithm")
Reported-by: Wenbo Zhang <ethercflow@gmail.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200313172336.1879637-3-andriin@fb.com