BPF selftests compilation failure due to selftests-bpf-initialize-operation-name-before-use.patch

Hi Sasha,

I am running into BPF selftests compilation error on 6.18 (but it possibly affect other branches as well, haven't check) due to selftests-bpf-initialize-operation-name-before-use.patch currently sitting in stable-queue:

/tmp/work/linux-stable/linux-stable/tools/testing/selftests/bpf/prog_tests/verifier_log.c: In function ‘verif_btf_log_subtest’:
/tmp/work/linux-stable/linux-stable/tools/testing/selftests/bpf/prog_tests/verifier_log.c:320:9: error: implicit declaration of function ‘strscpy’; did you mean ‘strlcpy’? [-Werror=implicit-function-declaration]

  320 |         strscpy(op_name, "log_fixed", sizeof(op_name));
      |         ^~~~~~~
      |         strlcpy

Can you pick up commit 63c49efc987a ("selftests/bpf: Add simple strscpy() implementation") along? I think that should be enough to fix the build failure.

Can you pick up commit 63c49efc987a ("selftests/bpf: Add simple strscpy() implementation") along? I think that should be enough to fix the build failure.

Quoted 3 lines

Can you pick up commit 63c49efc987a ("selftests/bpf: Add simple strscpy() implementation") along? I think that should be enough to fix the build failure.

Greg has already picked it up for 6.18, which covers the tree you hit.

The offending selftests patch is also queued for 6.12 and 6.6, and you were right that they're affected too. Unfortunately 63c49efc987a doesn't apply there as-is: it depends on 9a6a6a319157 ("tools/testing: add linux/args.h header and fix radix, VMA tests"), which isn't in either tree.

Could you send adapted backports of the strscpy helper for 6.12.y and 6.6.y? I'll hold off on those branches until then.