tree f7f40317bb1474a382035fb58a120e73c82fec46
parent 4b1c5d917d34f705096bb7dd8a2bd19b0881970e
author Alexei Starovoitov <ast@kernel.org> 1536786370 -0700
committer Daniel Borkmann <daniel@iogearbox.net> 1536787802 +0200

bpf/verifier: disallow pointer subtraction

Subtraction of pointers was accidentally allowed for unpriv programs
by commit 82abbf8d2fc4. Revert that part of commit.

Fixes: 82abbf8d2fc4 ("bpf: do not allow root to mangle valid pointers")
Reported-by: Jann Horn <jannh@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>