On Sat, Apr 04, 2020 at 10:37:03PM +0200, Sven Schnelle wrote:
> If vdso_info can't be parsed correctly, vdso_info.nbucket might
> contain zero. Add a check and return NULL which will fail the
> symbol lookup.
Ping?
>
> Signed-off-by: Sven Schnelle <svens@xxxxxxxxxxxxx>
> ---
> tools/testing/selftests/vDSO/parse_vdso.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/tools/testing/selftests/vDSO/parse_vdso.c b/tools/testing/selftests/vDSO/parse_vdso.c
> index 1dbb4b87268f..8e5a70a24d9a 100644
> --- a/tools/testing/selftests/vDSO/parse_vdso.c
> +++ b/tools/testing/selftests/vDSO/parse_vdso.c
> @@ -226,6 +226,9 @@ void *vdso_sym(const char *version, const char *name)
> return 0;
>
> ver_hash = elf_hash(version);
> + if (!vdso_info.nbucket)
> + return NULL;
> +
> ELF(Word) chain = vdso_info.bucket[elf_hash(name) % vdso_info.nbucket];
>
> for (; chain != STN_UNDEF; chain = vdso_info.chain[chain]) {
> --
> 2.17.1
>
