bpf: Change bpf_obj_name_cpy() to better ensure map's name is init by 0

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During get_info_by_fd, the prog/map name is memcpy-ed.  It depends
on the prog->aux->name and map->name to be zero initialized.

bpf_prog_aux is easy to guarantee that aux->name is zero init.

The name in bpf_map may be harder to be guaranteed in the future when
new map type is added.

Hence, this patch makes bpf_obj_name_cpy() to always zero init
the prog/map name.

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Martin KaFai Lau 2017-10-05 21:52:11 -07:00 • committed by David S. Miller

parent f192970de8

commit 473d97343f

1 changed files with 2 additions and 3 deletions

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kernel/bpf/syscall.c

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