diff options
| author | Leon Hwang <leon.hwang@linux.dev> | 2026-06-24 23:51:15 +0800 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2026-07-01 11:27:37 -0700 |
| commit | 163944262f8646bf3a1eec557b6aff1f38582a9f (patch) | |
| tree | be1005a67a053b20f512863c47f661e4dafa408f /include/uapi/linux | |
| parent | 7cf9cd98cf6f0df3befc167ca6b54c07014d71de (diff) | |
selftests/bpf: Verify no non-zeroed kernel heap memory exposure
When lookup element from those per-CPU maps, which have special field
in their values and their value size is not equal to roundup(value_sz, 8),
the padding size of temporary non-zeroed kernel heap memory allocated by
kvmalloc should not be exposed to user space.
Without the fix:
test_map_uninit_mem_exposure:FAIL:zeroed tail bytes unexpected memory mismatch
actual:
2B 2B 2B 2B
expected:
00 00 00 00
Assisted-by: Codex:gpt-5.5
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260624155115.85196-3-leon.hwang@linux.dev
Diffstat (limited to 'include/uapi/linux')
0 files changed, 0 insertions, 0 deletions