On Mon, Mar 11, 2019 at 2:51 PM Daniel Borkmann <daniel@xxxxxxxxxxxxx> wrote:
>
> Trivial addition to allow '.' aside from '_' as "special" characters
> in the object name. Used to allow for substrings in maps from loader
> side such as ".bss", ".data", ".rodata", but could also be useful for
> other purposes.
>
> Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
> ---
> kernel/bpf/syscall.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index b5ba138351e1..04279747c092 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -456,10 +456,10 @@ static int bpf_obj_name_cpy(char *dst, const char *src)
> const char *end = src + BPF_OBJ_NAME_LEN;
>
> memset(dst, 0, BPF_OBJ_NAME_LEN);
> -
> - /* Copy all isalnum() and '_' char */
> + /* Copy all isalnum(), '_' and '.' chars. */
> while (src < end && *src) {
> - if (!isalnum(*src) && *src != '_')
> + if (!isalnum(*src) &&
> + *src != '_' && *src != '.')
> return -EINVAL;
> *dst++ = *src++;
> }
> --
> 2.17.1
>
