From: Eduard Zingerman <eddyz87@gmail.com>
To: bpf@vger.kernel.org, ast@kernel.org
Cc: andrii@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev,
kernel-team@fb.com, yhs@fb.com,
Eduard Zingerman <eddyz87@gmail.com>
Subject: [PATCH bpf-next 23/24] selftests/bpf: verifier/value_illegal_alu converted to inline assembly
Date: Fri, 21 Apr 2023 20:42:33 +0300 [thread overview]
Message-ID: <20230421174234.2391278-24-eddyz87@gmail.com> (raw)
In-Reply-To: <20230421174234.2391278-1-eddyz87@gmail.com>
Test verifier/value_illegal_alu automatically converted to use inline assembly.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
---
.../selftests/bpf/prog_tests/verifier.c | 2 +
.../bpf/progs/verifier_value_illegal_alu.c | 149 ++++++++++++++++++
.../bpf/verifier/value_illegal_alu.c | 95 -----------
3 files changed, 151 insertions(+), 95 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c
delete mode 100644 tools/testing/selftests/bpf/verifier/value_illegal_alu.c
diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
index 94405bf00b47..56b9248a15c0 100644
--- a/tools/testing/selftests/bpf/prog_tests/verifier.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
@@ -60,6 +60,7 @@
#include "verifier_unpriv_perf.skel.h"
#include "verifier_value_adj_spill.skel.h"
#include "verifier_value.skel.h"
+#include "verifier_value_illegal_alu.skel.h"
#include "verifier_value_or_null.skel.h"
#include "verifier_var_off.skel.h"
#include "verifier_xadd.skel.h"
@@ -156,6 +157,7 @@ void test_verifier_unpriv(void) { RUN(verifier_unpriv); }
void test_verifier_unpriv_perf(void) { RUN(verifier_unpriv_perf); }
void test_verifier_value_adj_spill(void) { RUN(verifier_value_adj_spill); }
void test_verifier_value(void) { RUN(verifier_value); }
+void test_verifier_value_illegal_alu(void) { RUN(verifier_value_illegal_alu); }
void test_verifier_value_or_null(void) { RUN(verifier_value_or_null); }
void test_verifier_var_off(void) { RUN(verifier_var_off); }
void test_verifier_xadd(void) { RUN(verifier_xadd); }
diff --git a/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c b/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c
new file mode 100644
index 000000000000..71814a753216
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Converted from tools/testing/selftests/bpf/verifier/value_illegal_alu.c */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#define MAX_ENTRIES 11
+
+struct test_val {
+ unsigned int index;
+ int foo[MAX_ENTRIES];
+};
+
+struct {
+ __uint(type, BPF_MAP_TYPE_HASH);
+ __uint(max_entries, 1);
+ __type(key, long long);
+ __type(value, struct test_val);
+} map_hash_48b SEC(".maps");
+
+SEC("socket")
+__description("map element value illegal alu op, 1")
+__failure __msg("R0 bitwise operator &= on pointer")
+__failure_unpriv
+__naked void value_illegal_alu_op_1(void)
+{
+ asm volatile (" \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = 0; \
+ *(u64*)(r2 + 0) = r1; \
+ r1 = %[map_hash_48b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 == 0 goto l0_%=; \
+ r0 &= 8; \
+ r1 = 22; \
+ *(u64*)(r0 + 0) = r1; \
+l0_%=: exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_48b)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("map element value illegal alu op, 2")
+__failure __msg("R0 32-bit pointer arithmetic prohibited")
+__failure_unpriv
+__naked void value_illegal_alu_op_2(void)
+{
+ asm volatile (" \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = 0; \
+ *(u64*)(r2 + 0) = r1; \
+ r1 = %[map_hash_48b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 == 0 goto l0_%=; \
+ w0 += 0; \
+ r1 = 22; \
+ *(u64*)(r0 + 0) = r1; \
+l0_%=: exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_48b)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("map element value illegal alu op, 3")
+__failure __msg("R0 pointer arithmetic with /= operator")
+__failure_unpriv
+__naked void value_illegal_alu_op_3(void)
+{
+ asm volatile (" \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = 0; \
+ *(u64*)(r2 + 0) = r1; \
+ r1 = %[map_hash_48b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 == 0 goto l0_%=; \
+ r0 /= 42; \
+ r1 = 22; \
+ *(u64*)(r0 + 0) = r1; \
+l0_%=: exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_48b)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("map element value illegal alu op, 4")
+__failure __msg("invalid mem access 'scalar'")
+__failure_unpriv __msg_unpriv("R0 pointer arithmetic prohibited")
+__flag(BPF_F_ANY_ALIGNMENT)
+__naked void value_illegal_alu_op_4(void)
+{
+ asm volatile (" \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = 0; \
+ *(u64*)(r2 + 0) = r1; \
+ r1 = %[map_hash_48b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 == 0 goto l0_%=; \
+ r0 = be64 r0; \
+ r1 = 22; \
+ *(u64*)(r0 + 0) = r1; \
+l0_%=: exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_48b)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("map element value illegal alu op, 5")
+__failure __msg("R0 invalid mem access 'scalar'")
+__msg_unpriv("leaking pointer from stack off -8")
+__flag(BPF_F_ANY_ALIGNMENT)
+__naked void value_illegal_alu_op_5(void)
+{
+ asm volatile (" \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = 0; \
+ *(u64*)(r2 + 0) = r1; \
+ r1 = %[map_hash_48b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 == 0 goto l0_%=; \
+ r3 = 4096; \
+ r2 = r10; \
+ r2 += -8; \
+ *(u64*)(r2 + 0) = r0; \
+ lock *(u64 *)(r2 + 0) += r3; \
+ r0 = *(u64*)(r2 + 0); \
+ r1 = 22; \
+ *(u64*)(r0 + 0) = r1; \
+l0_%=: exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_48b)
+ : __clobber_all);
+}
+
+char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/verifier/value_illegal_alu.c b/tools/testing/selftests/bpf/verifier/value_illegal_alu.c
deleted file mode 100644
index d6f29eb4bd57..000000000000
--- a/tools/testing/selftests/bpf/verifier/value_illegal_alu.c
+++ /dev/null
@@ -1,95 +0,0 @@
-{
- "map element value illegal alu op, 1",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
- BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 8),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 22),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr = "R0 bitwise operator &= on pointer",
- .result = REJECT,
-},
-{
- "map element value illegal alu op, 2",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
- BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 0),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 22),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr = "R0 32-bit pointer arithmetic prohibited",
- .result = REJECT,
-},
-{
- "map element value illegal alu op, 3",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
- BPF_ALU64_IMM(BPF_DIV, BPF_REG_0, 42),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 22),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr = "R0 pointer arithmetic with /= operator",
- .result = REJECT,
-},
-{
- "map element value illegal alu op, 4",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
- BPF_ENDIAN(BPF_FROM_BE, BPF_REG_0, 64),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 22),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr_unpriv = "R0 pointer arithmetic prohibited",
- .errstr = "invalid mem access 'scalar'",
- .result = REJECT,
- .result_unpriv = REJECT,
- .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
-},
-{
- "map element value illegal alu op, 5",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 7),
- BPF_MOV64_IMM(BPF_REG_3, 4096),
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 0),
- BPF_ATOMIC_OP(BPF_DW, BPF_ADD, BPF_REG_2, BPF_REG_3, 0),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 0),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 22),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr_unpriv = "leaking pointer from stack off -8",
- .errstr = "R0 invalid mem access 'scalar'",
- .result = REJECT,
- .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
-},
--
2.40.0
next prev parent reply other threads:[~2023-04-21 17:43 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-21 17:42 [PATCH bpf-next 00/24] Second set of verifier/*.c migrated to inline assembly Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 01/24] selftests/bpf: Add notion of auxiliary programs for test_loader Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 02/24] selftests/bpf: verifier/bounds converted to inline assembly Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 03/24] selftests/bpf: verifier/bpf_get_stack " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 04/24] selftests/bpf: verifier/btf_ctx_access " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 05/24] selftests/bpf: verifier/ctx " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 06/24] selftests/bpf: verifier/d_path " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 07/24] selftests/bpf: verifier/direct_packet_access " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 08/24] selftests/bpf: verifier/jeq_infer_not_null " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 09/24] selftests/bpf: verifier/loops1 " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 10/24] selftests/bpf: verifier/lwt " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 11/24] selftests/bpf: verifier/map_in_map " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 12/24] selftests/bpf: verifier/map_ptr_mixing " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 13/24] selftests/bpf: verifier/precise " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 14/24] selftests/bpf: verifier/prevent_map_lookup " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 15/24] selftests/bpf: verifier/ref_tracking " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 16/24] selftests/bpf: verifier/regalloc " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 17/24] selftests/bpf: verifier/runtime_jit " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 18/24] selftests/bpf: verifier/search_pruning " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 19/24] selftests/bpf: verifier/sock " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 20/24] selftests/bpf: verifier/spin_lock " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 21/24] selftests/bpf: verifier/subreg " Eduard Zingerman
2023-04-21 17:42 ` [PATCH bpf-next 22/24] selftests/bpf: verifier/unpriv " Eduard Zingerman
2023-04-21 17:42 ` Eduard Zingerman [this message]
2023-04-21 17:42 ` [PATCH bpf-next 24/24] selftests/bpf: verifier/value_ptr_arith " Eduard Zingerman
2023-04-21 19:40 ` [PATCH bpf-next 00/24] Second set of verifier/*.c migrated " patchwork-bot+netdevbpf
2023-04-21 19:49 ` Eduard Zingerman
2023-04-21 19:53 ` Alexei Starovoitov
2023-04-21 19:48 ` Alexei Starovoitov
2023-04-21 20:00 ` Eduard Zingerman
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