Commit 377d3715 authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

selftests/bpf: Fix bpf_mod_race test failure with arm64 64KB page size 



Currently, uffd_register.range.len is set to 4096 for command
'ioctl(uffd, UFFDIO_REGISTER, &uffd_register)'. For arm64 64KB page size,
the len must be 64KB size aligned as page size alignment is required.
See fs/userfaultfd.c:validate_unaligned_range().

Signed-off-by: default avatarYonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20250607013615.1551783-1-yonghong.song@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent ae882403

tools/testing/selftests/bpf/prog_tests/bpf_mod_race.c

+1 −1
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ static int test_setup_uffd(void *fault_addr) 
	}



	uffd_register.range.start = (unsigned long)fault_addr;

	uffd_register.range.len = 4096;

	uffd_register.range.len = getpagesize();

	uffd_register.mode = UFFDIO_REGISTER_MODE_MISSING;

	if (ioctl(uffd, UFFDIO_REGISTER, &uffd_register)) {

		close(uffd);