selftests/bpf: verifier/cgroup_skb.c converted to inline assembly

Test verifier/cgroup_skb.c automatically converted to use inline assembly.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230325025524.144043-14-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
index b138c98..53e41af 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/verifier.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
@@ -10,6 +10,7 @@
 #include "verifier_bounds_mix_sign_unsign.skel.h"
 #include "verifier_cfg.skel.h"
 #include "verifier_cgroup_inv_retcode.skel.h"
+#include "verifier_cgroup_skb.skel.h"
 
 __maybe_unused
 static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
@@ -42,3 +43,4 @@ void test_verifier_bounds_deduction(void)     { RUN(verifier_bounds_deduction);
 void test_verifier_bounds_mix_sign_unsign(void) { RUN(verifier_bounds_mix_sign_unsign); }
 void test_verifier_cfg(void)                  { RUN(verifier_cfg); }
 void test_verifier_cgroup_inv_retcode(void)   { RUN(verifier_cgroup_inv_retcode); }
+void test_verifier_cgroup_skb(void)           { RUN(verifier_cgroup_skb); }

diff --git a/tools/testing/selftests/bpf/progs/verifier_cgroup_skb.c b/tools/testing/selftests/bpf/progs/verifier_cgroup_skb.c
new file mode 100644 (file)
index 0000000..5ee3d34
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_cgroup_skb.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Converted from tools/testing/selftests/bpf/verifier/cgroup_skb.c */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+SEC("cgroup/skb")
+__description("direct packet read test#1 for CGROUP_SKB")
+__success __failure_unpriv
+__msg_unpriv("invalid bpf_context access off=76 size=4")
+__retval(0)
+__naked void test_1_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r2 = *(u32*)(r1 + %[__sk_buff_data]);           \
+       r3 = *(u32*)(r1 + %[__sk_buff_data_end]);       \
+       r4 = *(u32*)(r1 + %[__sk_buff_len]);            \
+       r5 = *(u32*)(r1 + %[__sk_buff_pkt_type]);       \
+       r6 = *(u32*)(r1 + %[__sk_buff_mark]);           \
+       *(u32*)(r1 + %[__sk_buff_mark]) = r6;           \
+       r7 = *(u32*)(r1 + %[__sk_buff_queue_mapping]);  \
+       r8 = *(u32*)(r1 + %[__sk_buff_protocol]);       \
+       r9 = *(u32*)(r1 + %[__sk_buff_vlan_present]);   \
+       r0 = r2;                                        \
+       r0 += 8;                                        \
+       if r0 > r3 goto l0_%=;                          \
+       r0 = *(u8*)(r2 + 0);                            \
+l0_%=: r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
+         __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)),
+         __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)),
+         __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
+         __imm_const(__sk_buff_pkt_type, offsetof(struct __sk_buff, pkt_type)),
+         __imm_const(__sk_buff_protocol, offsetof(struct __sk_buff, protocol)),
+         __imm_const(__sk_buff_queue_mapping, offsetof(struct __sk_buff, queue_mapping)),
+         __imm_const(__sk_buff_vlan_present, offsetof(struct __sk_buff, vlan_present))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("direct packet read test#2 for CGROUP_SKB")
+__success __success_unpriv __retval(0)
+__naked void test_2_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r4 = *(u32*)(r1 + %[__sk_buff_vlan_tci]);       \
+       r5 = *(u32*)(r1 + %[__sk_buff_vlan_proto]);     \
+       r6 = *(u32*)(r1 + %[__sk_buff_priority]);       \
+       *(u32*)(r1 + %[__sk_buff_priority]) = r6;       \
+       r7 = *(u32*)(r1 + %[__sk_buff_ingress_ifindex]);\
+       r8 = *(u32*)(r1 + %[__sk_buff_tc_index]);       \
+       r9 = *(u32*)(r1 + %[__sk_buff_hash]);           \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_hash, offsetof(struct __sk_buff, hash)),
+         __imm_const(__sk_buff_ingress_ifindex, offsetof(struct __sk_buff, ingress_ifindex)),
+         __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)),
+         __imm_const(__sk_buff_tc_index, offsetof(struct __sk_buff, tc_index)),
+         __imm_const(__sk_buff_vlan_proto, offsetof(struct __sk_buff, vlan_proto)),
+         __imm_const(__sk_buff_vlan_tci, offsetof(struct __sk_buff, vlan_tci))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("direct packet read test#3 for CGROUP_SKB")
+__success __success_unpriv __retval(0)
+__naked void test_3_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r4 = *(u32*)(r1 + %[__sk_buff_cb_0]);           \
+       r5 = *(u32*)(r1 + %[__sk_buff_cb_1]);           \
+       r6 = *(u32*)(r1 + %[__sk_buff_cb_2]);           \
+       r7 = *(u32*)(r1 + %[__sk_buff_cb_3]);           \
+       r8 = *(u32*)(r1 + %[__sk_buff_cb_4]);           \
+       r9 = *(u32*)(r1 + %[__sk_buff_napi_id]);        \
+       *(u32*)(r1 + %[__sk_buff_cb_0]) = r4;           \
+       *(u32*)(r1 + %[__sk_buff_cb_1]) = r5;           \
+       *(u32*)(r1 + %[__sk_buff_cb_2]) = r6;           \
+       *(u32*)(r1 + %[__sk_buff_cb_3]) = r7;           \
+       *(u32*)(r1 + %[__sk_buff_cb_4]) = r8;           \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])),
+         __imm_const(__sk_buff_cb_1, offsetof(struct __sk_buff, cb[1])),
+         __imm_const(__sk_buff_cb_2, offsetof(struct __sk_buff, cb[2])),
+         __imm_const(__sk_buff_cb_3, offsetof(struct __sk_buff, cb[3])),
+         __imm_const(__sk_buff_cb_4, offsetof(struct __sk_buff, cb[4])),
+         __imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("direct packet read test#4 for CGROUP_SKB")
+__success __success_unpriv __retval(0)
+__naked void test_4_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r2 = *(u32*)(r1 + %[__sk_buff_family]);         \
+       r3 = *(u32*)(r1 + %[__sk_buff_remote_ip4]);     \
+       r4 = *(u32*)(r1 + %[__sk_buff_local_ip4]);      \
+       r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_0]);   \
+       r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_1]);   \
+       r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_2]);   \
+       r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_3]);   \
+       r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_0]);    \
+       r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_1]);    \
+       r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_2]);    \
+       r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_3]);    \
+       r7 = *(u32*)(r1 + %[__sk_buff_remote_port]);    \
+       r8 = *(u32*)(r1 + %[__sk_buff_local_port]);     \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_family, offsetof(struct __sk_buff, family)),
+         __imm_const(__sk_buff_local_ip4, offsetof(struct __sk_buff, local_ip4)),
+         __imm_const(__sk_buff_local_ip6_0, offsetof(struct __sk_buff, local_ip6[0])),
+         __imm_const(__sk_buff_local_ip6_1, offsetof(struct __sk_buff, local_ip6[1])),
+         __imm_const(__sk_buff_local_ip6_2, offsetof(struct __sk_buff, local_ip6[2])),
+         __imm_const(__sk_buff_local_ip6_3, offsetof(struct __sk_buff, local_ip6[3])),
+         __imm_const(__sk_buff_local_port, offsetof(struct __sk_buff, local_port)),
+         __imm_const(__sk_buff_remote_ip4, offsetof(struct __sk_buff, remote_ip4)),
+         __imm_const(__sk_buff_remote_ip6_0, offsetof(struct __sk_buff, remote_ip6[0])),
+         __imm_const(__sk_buff_remote_ip6_1, offsetof(struct __sk_buff, remote_ip6[1])),
+         __imm_const(__sk_buff_remote_ip6_2, offsetof(struct __sk_buff, remote_ip6[2])),
+         __imm_const(__sk_buff_remote_ip6_3, offsetof(struct __sk_buff, remote_ip6[3])),
+         __imm_const(__sk_buff_remote_port, offsetof(struct __sk_buff, remote_port))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("invalid access of tc_classid for CGROUP_SKB")
+__failure __msg("invalid bpf_context access")
+__failure_unpriv
+__naked void tc_classid_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r0 = *(u32*)(r1 + %[__sk_buff_tc_classid]);     \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_tc_classid, offsetof(struct __sk_buff, tc_classid))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("invalid access of data_meta for CGROUP_SKB")
+__failure __msg("invalid bpf_context access")
+__failure_unpriv
+__naked void data_meta_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r0 = *(u32*)(r1 + %[__sk_buff_data_meta]);      \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_data_meta, offsetof(struct __sk_buff, data_meta))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("invalid access of flow_keys for CGROUP_SKB")
+__failure __msg("invalid bpf_context access")
+__failure_unpriv
+__naked void flow_keys_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r0 = *(u32*)(r1 + %[__sk_buff_flow_keys]);      \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_flow_keys, offsetof(struct __sk_buff, flow_keys))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("invalid write access to napi_id for CGROUP_SKB")
+__failure __msg("invalid bpf_context access")
+__failure_unpriv
+__naked void napi_id_for_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r9 = *(u32*)(r1 + %[__sk_buff_napi_id]);        \
+       *(u32*)(r1 + %[__sk_buff_napi_id]) = r9;        \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("write tstamp from CGROUP_SKB")
+__success __failure_unpriv
+__msg_unpriv("invalid bpf_context access off=152 size=8")
+__retval(0)
+__naked void write_tstamp_from_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r0 = 0;                                         \
+       *(u64*)(r1 + %[__sk_buff_tstamp]) = r0;         \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
+       : __clobber_all);
+}
+
+SEC("cgroup/skb")
+__description("read tstamp from CGROUP_SKB")
+__success __success_unpriv __retval(0)
+__naked void read_tstamp_from_cgroup_skb(void)
+{
+       asm volatile ("                                 \
+       r0 = *(u64*)(r1 + %[__sk_buff_tstamp]);         \
+       r0 = 0;                                         \
+       exit;                                           \
+"      :
+       : __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
+       : __clobber_all);
+}
+
+char _license[] SEC("license") = "GPL";

diff --git a/tools/testing/selftests/bpf/verifier/cgroup_skb.c b/tools/testing/selftests/bpf/verifier/cgroup_skb.c
deleted file mode 100644 (file)
index 52e4c03..0000000
--- a/tools/testing/selftests/bpf/verifier/cgroup_skb.c
+++ /dev/null
@@ -1,197 +0,0 @@
-{
-       "direct packet read test#1 for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
-                   offsetof(struct __sk_buff, data)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
-                   offsetof(struct __sk_buff, data_end)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1,
-                   offsetof(struct __sk_buff, len)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, pkt_type)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, mark)),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_6,
-                   offsetof(struct __sk_buff, mark)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
-                   offsetof(struct __sk_buff, queue_mapping)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_1,
-                   offsetof(struct __sk_buff, protocol)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_9, BPF_REG_1,
-                   offsetof(struct __sk_buff, vlan_present)),
-       BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
-       BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
-       BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
-       BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .result_unpriv = REJECT,
-       .errstr_unpriv = "invalid bpf_context access off=76 size=4",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "direct packet read test#2 for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1,
-                   offsetof(struct __sk_buff, vlan_tci)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, vlan_proto)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, priority)),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_6,
-                   offsetof(struct __sk_buff, priority)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
-                   offsetof(struct __sk_buff, ingress_ifindex)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_1,
-                   offsetof(struct __sk_buff, tc_index)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_9, BPF_REG_1,
-                   offsetof(struct __sk_buff, hash)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "direct packet read test#3 for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1,
-                   offsetof(struct __sk_buff, cb[0])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, cb[1])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, cb[2])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
-                   offsetof(struct __sk_buff, cb[3])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_1,
-                   offsetof(struct __sk_buff, cb[4])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_9, BPF_REG_1,
-                   offsetof(struct __sk_buff, napi_id)),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_4,
-                   offsetof(struct __sk_buff, cb[0])),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_5,
-                   offsetof(struct __sk_buff, cb[1])),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_6,
-                   offsetof(struct __sk_buff, cb[2])),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_7,
-                   offsetof(struct __sk_buff, cb[3])),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_8,
-                   offsetof(struct __sk_buff, cb[4])),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "direct packet read test#4 for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
-                   offsetof(struct __sk_buff, family)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_ip4)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_ip4)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_ip6[0])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_ip6[1])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_ip6[2])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_ip6[3])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_ip6[0])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_ip6[1])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_ip6[2])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_ip6[3])),
-       BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
-                   offsetof(struct __sk_buff, remote_port)),
-       BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_1,
-                   offsetof(struct __sk_buff, local_port)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "invalid access of tc_classid for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
-                   offsetof(struct __sk_buff, tc_classid)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = REJECT,
-       .errstr = "invalid bpf_context access",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "invalid access of data_meta for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
-                   offsetof(struct __sk_buff, data_meta)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = REJECT,
-       .errstr = "invalid bpf_context access",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "invalid access of flow_keys for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
-                   offsetof(struct __sk_buff, flow_keys)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = REJECT,
-       .errstr = "invalid bpf_context access",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "invalid write access to napi_id for CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_W, BPF_REG_9, BPF_REG_1,
-                   offsetof(struct __sk_buff, napi_id)),
-       BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_9,
-                   offsetof(struct __sk_buff, napi_id)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = REJECT,
-       .errstr = "invalid bpf_context access",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "write tstamp from CGROUP_SKB",
-       .insns = {
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
-                   offsetof(struct __sk_buff, tstamp)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .result_unpriv = REJECT,
-       .errstr_unpriv = "invalid bpf_context access off=152 size=8",
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},
-{
-       "read tstamp from CGROUP_SKB",
-       .insns = {
-       BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
-                   offsetof(struct __sk_buff, tstamp)),
-       BPF_MOV64_IMM(BPF_REG_0, 0),
-       BPF_EXIT_INSN(),
-       },
-       .result = ACCEPT,
-       .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-},