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7891a87efc
linux/tools/testing/selftests/bpf
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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
..
gnu selftests/bpf: get rid of -D__x86_64__ 2017-05-03 09:51:25 -04:00
include/uapi/linux License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
.gitignore bpf: Add test_tag to .gitignore 2017-02-10 15:56:08 -05:00
bpf_endian.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bpf_helpers.h bpf: Revert bpf_overrid_function() helper changes. 2017-11-11 18:24:55 +09:00
bpf_util.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cgroup_helpers.c bpf: move cgroup_helpers from samples/bpf/ to tools/testing/selftesting/bpf/ 2017-11-05 23:26:51 +09:00
cgroup_helpers.h bpf: move cgroup_helpers from samples/bpf/ to tools/testing/selftesting/bpf/ 2017-11-05 23:26:51 +09:00
config
dev_cgroup.c selftests/bpf: add a test for device cgroup controller 2017-11-05 23:26:51 +09:00
Makefile selftests/bpf: fix Makefile for passing LLC to the command line 2017-12-22 00:54:31 +01:00
sockmap_parse_prog.c selftests/bpf: remove useless bpf_trace_printk 2017-11-01 12:06:46 +09:00
sockmap_verdict_prog.c selftests/bpf: remove useless bpf_trace_printk 2017-11-01 12:06:46 +09:00
test_align.c selftests/bpf: fix test_align 2018-01-07 00:10:32 +01:00
test_dev_cgroup.c selftests/bpf: add a test for device cgroup controller 2017-11-05 23:26:51 +09:00
test_iptunnel_common.h selftests/bpf: add a test for basic XDP functionality 2017-04-01 12:45:57 -07:00
test_kmod.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_l4lb.c bpf: Move endianness BPF helpers out of bpf_util.h 2017-05-01 12:43:49 -07:00
test_lpm_map.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
test_lru_map.c bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4 2017-04-17 13:55:52 -04:00
test_maps.c selftests/bpf: fix broken build of test_maps 2017-10-23 01:06:31 +01:00
test_obj_id.c bpf: Fix test_obj_id.c for llvm 5.0 2017-06-09 15:15:11 -04:00
test_pkt_access.c selftests/bpf: fix broken build due to types.h 2017-05-17 18:45:14 -04:00
test_pkt_md_access.c bpf: fix selftest/bpf/test_pkt_md_access on s390x 2017-08-07 10:06:27 -07:00
test_progs.c bpf: Fix tools and testing build. 2017-12-20 00:15:05 +01:00
test_tag.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
test_tcp_estats.c selftests/bpf: add a test case to check verifier pointer arithmetic 2017-05-03 09:51:25 -04:00
test_verifier_log.c tools/bpf: adjust rlimit RLIMIT_MEMLOCK for test_verifier_log 2017-11-30 19:55:18 +01:00
test_verifier.c bpf: arsh is not supported in 32 bit alu thus reject it 2018-01-10 14:42:22 -08:00
test_xdp_meta.c bpf: improve selftests and add tests for meta pointer 2017-09-26 13:36:44 -07:00
test_xdp_meta.sh bpf: improve selftests and add tests for meta pointer 2017-09-26 13:36:44 -07:00
test_xdp_redirect.c selftests: bpf: add a test for XDP redirect 2017-08-08 18:12:50 -07:00
test_xdp_redirect.sh selftests: bpf: add check for ip XDP redirect 2017-08-11 14:57:31 -07:00
test_xdp.c selftests: bpf: Use bpf_endian.h in test_xdp.c 2017-05-02 07:52:01 -07:00