linux/tools/testing
Daniel Borkmann 7891a87efc bpf: arsh is not supported in 32 bit alu thus reject it
The following snippet was throwing an 'unknown opcode cc' warning
in BPF interpreter:

  0: (18) r0 = 0x0
  2: (7b) *(u64 *)(r10 -16) = r0
  3: (cc) (u32) r0 s>>= (u32) r0
  4: (95) exit

Although a number of JITs do support BPF_ALU | BPF_ARSH | BPF_{K,X}
generation, not all of them do and interpreter does neither. We can
leave existing ones and implement it later in bpf-next for the
remaining ones, but reject this properly in verifier for the time
being.

Fixes: 17a5267067 ("bpf: verifier (add verifier core)")
Reported-by: syzbot+93c4904c5c70348a6890@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-10 14:42:22 -08:00
..
fault-injection License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ktest License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nvdimm libnvdimm for 4.15 2017-11-17 09:51:57 -08:00
radix-tree mm, truncate: do not check mapping for every page being truncated 2017-11-15 18:21:06 -08:00
scatterlist tools/testing/scatterlist: Test new __sg_alloc_table_from_pages 2017-09-07 10:54:40 +01:00
selftests bpf: arsh is not supported in 32 bit alu thus reject it 2018-01-10 14:42:22 -08:00
vsock VSOCK: add tools/testing/vsock/vsock_diag_test 2017-10-05 18:44:17 -07:00