| commit | dd066823db2ac4e22f721ec85190817b58059a54 | [log] [tgz] |
|---|---|---|
| author | Alexei Starovoitov <ast@kernel.org> | Wed Sep 12 14:06:10 2018 -0700 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Wed Sep 12 23:30:02 2018 +0200 |
| tree | f7f40317bb1474a382035fb58a120e73c82fec46 | |
| parent | 4b1c5d917d34f705096bb7dd8a2bd19b0881970e [diff] |
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>