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selftests/bpf: Silence maybe-uninitialized compiler warning in libarena

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When compiling BPF selftests with -O2, GCC reports a maybe-uninitialized
warning in libarena code:

    In file included from /bpf-next/tools/testing/selftests/bpf/prog_tests/libarena_asan.c:11:
    In function ‘libarena_asan_init’,
        inlined from ‘run_test’ at /bpf-next/tools/testing/selftests/bpf/prog_tests/libarena_asan.c:59:8,
        inlined from ‘test_libarena_asan’ at /bpf-next/tools/testing/selftests/bpf/prog_tests/libarena_asan.c:91:2:
    /bpf-next/tools/testing/selftests/bpf/libarena/include/libarena/userspace.h:126:14: error: ‘globals_pages’ may be used uninitialized [-Werror=maybe-uninitialized]
      126 |         args = (struct asan_init_args){
          |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
      127 |                 .arena_all_pages = arena_all_pages,
          |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      128 |                 .arena_globals_pages = globals_pages,
          |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      129 |         };
          |         ~
    /bpf-next/tools/testing/selftests/bpf/libarena/include/libarena/userspace.h: In function ‘test_libarena_asan’:
    /bpf-next/tools/testing/selftests/bpf/libarena/include/libarena/userspace.h:118:13: note: ‘globals_pages’ was declared here
      118 |         u64 globals_pages;
          |             ^~~~~~~~~~~~~

Silence the warning by initializing globals_pages to 0.

Fixes: cfc00618b9 ("selftests/bpf: Add ASAN support for libarena selftests")
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Link: https://lore.kernel.org/bpf/9f77a5c05c3c731ab2655fd66716ab9de4478b15.1784112948.git.vmalik@redhat.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
This commit is contained in:
Viktor Malik
2026-07-15 13:22:03 +02:00
committed by Kumar Kartikeya Dwivedi
parent dcd164ec67
commit 5763790965
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/bpf/libarena/include/libarena/userspace.h
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@@ -115,7 +115,7 @@ static inline int libarena_asan_init(int arena_asan_init_fd,
{
LIBBPF_OPTS(bpf_test_run_opts, opts);
struct asan_init_args args;
u64 globals_pages;
u64 globals_pages = 0;
int ret;
ret = libarena_get_globals_pages(arena_asan_init_fd,