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  1.   c9f801deb73d69cb815199861d1f433ea476f4a2
  2.   patches.suse
  3.   bpf-tests-Add-tests-of-BPF_LDX-and-BPF_STX-with-smal.patch
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From: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Date: Fri, 1 Oct 2021 15:03:39 +0200
Subject: bpf/tests: Add tests of BPF_LDX and BPF_STX with small sizes
Patch-mainline: v5.16-rc1
Git-commit: caaaa1667bf198c54cc3141ad92ca6ce853e99cd
References: jsc#PED-1377

This patch adds a series of tests to verify the behavior of BPF_LDX and
BPF_STX with BPF_B//W sizes in isolation. In particular, it checks that
BPF_LDX zero-extendeds the result, and that BPF_STX does not overwrite
adjacent bytes in memory.

BPF_ST and operations on BPF_DW size are deemed to be sufficiently
tested by existing tests.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211001130348.3670534-2-johan.almbladh@anyfinetworks.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 lib/test_bpf.c |  254 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 254 insertions(+)

--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -6907,6 +6907,260 @@ static struct bpf_test tests[] = {
 		{ },
 		{ { 0, (u32) (cpu_to_le64(0xfedcba9876543210ULL) >> 32) } },
 	},
+	/* BPF_LDX_MEM B/H/W/DW */
+	{
+		"BPF_LDX_MEM | BPF_B",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R2, 0x0000000000000008ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_B, R0, R10, -1),
+#else
+			BPF_LDX_MEM(BPF_B, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_LDX_MEM | BPF_B, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R2, 0x0000000000000088ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_B, R0, R10, -1),
+#else
+			BPF_LDX_MEM(BPF_B, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_LDX_MEM | BPF_H",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R2, 0x0000000000000708ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_H, R0, R10, -2),
+#else
+			BPF_LDX_MEM(BPF_H, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_LDX_MEM | BPF_H, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R2, 0x0000000000008788ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_H, R0, R10, -2),
+#else
+			BPF_LDX_MEM(BPF_H, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_LDX_MEM | BPF_W",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R2, 0x0000000005060708ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_W, R0, R10, -4),
+#else
+			BPF_LDX_MEM(BPF_W, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_LDX_MEM | BPF_W, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R2, 0x0000000085868788ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_LDX_MEM(BPF_W, R0, R10, -4),
+#else
+			BPF_LDX_MEM(BPF_W, R0, R10, -8),
+#endif
+			BPF_JMP_REG(BPF_JNE, R0, R2, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	/* BPF_STX_MEM B/H/W/DW */
+	{
+		"BPF_STX_MEM | BPF_B",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b0c0d0e008ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_B, R10, R2, -1),
+#else
+			BPF_STX_MEM(BPF_B, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_STX_MEM | BPF_B, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b0c0d0e088ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_B, R10, R2, -1),
+#else
+			BPF_STX_MEM(BPF_B, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_STX_MEM | BPF_H",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b0c0d00708ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_H, R10, R2, -2),
+#else
+			BPF_STX_MEM(BPF_H, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_STX_MEM | BPF_H, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b0c0d08788ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_H, R10, R2, -2),
+#else
+			BPF_STX_MEM(BPF_H, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_STX_MEM | BPF_W",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x0102030405060708ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b005060708ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_W, R10, R2, -4),
+#else
+			BPF_STX_MEM(BPF_W, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
+	{
+		"BPF_STX_MEM | BPF_W, MSB set",
+		.u.insns_int = {
+			BPF_LD_IMM64(R1, 0x8090a0b0c0d0e0f0ULL),
+			BPF_LD_IMM64(R2, 0x8182838485868788ULL),
+			BPF_LD_IMM64(R3, 0x8090a0b085868788ULL),
+			BPF_STX_MEM(BPF_DW, R10, R1, -8),
+#ifdef __BIG_ENDIAN
+			BPF_STX_MEM(BPF_W, R10, R2, -4),
+#else
+			BPF_STX_MEM(BPF_W, R10, R2, -8),
+#endif
+			BPF_LDX_MEM(BPF_DW, R0, R10, -8),
+			BPF_JMP_REG(BPF_JNE, R0, R3, 1),
+			BPF_ALU64_IMM(BPF_MOV, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0 } },
+		.stack_depth = 8,
+	},
 	/* BPF_ST(X) | BPF_MEM | BPF_B/H/W/DW */
 	{
 		"ST_MEM_B: Store/Load byte: max negative",
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