[PATCH bpf 0/2] Use __aligned_u64 in UAPI fields

[PATCH bpf 0/2] Use __aligned_u64 in UAPI fields

[Eugene Syromiatnikov]

Hello.

It was discovered during strace development that struct bpf_map_info and
struct bpf_prog_info now have different layouts of i386/compat and x86_64.
Since it's already broken and bpf syscall has no separate compat (as
far as I can see), and the affecting change was introduced recently (in
Linux 4.16), it's proposed to change the layout of these structures
on 32-bit architectures by using __aligned_u64.

In order to somewhat future-proof from this problem in future, an
approach similar to the one implemented in RDMA subsystem recently
is proposed: use __aligned_u64 consistently throughout the UAPI header.

Eugene Syromiatnikov (2):
  bpf: fix alignment of netns_dev/netns_ino fields in
    bpf_{map,prog}_info
  bpf: enforce usage of __aligned_u64 in the UAPI header

 include/uapi/linux/bpf.h       | 30 +++++++++++++++---------------
 tools/include/uapi/linux/bpf.h | 30 +++++++++++++++---------------
 2 files changed, 30 insertions(+), 30 deletions(-)

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2.1.4