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5763790965
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>