1 files changed, 80 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/runtime_jit.c b/tools/testing/selftests/bpf/verifier/runtime_jit.c
new file mode 100644
index 000000000000..a9a8f620e71c
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/runtime_jit.c
@@ -0,0 +1,80 @@
+{
+	"runtime/jit: tail_call within bounds, prog once",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_3, 0),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 1),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 1 },
+	.result = ACCEPT,
+	.retval = 42,
+},
+{
+	"runtime/jit: tail_call within bounds, prog loop",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_3, 1),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 1),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 1 },
+	.result = ACCEPT,
+	.retval = 41,
+},
+{
+	"runtime/jit: tail_call within bounds, no prog",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_3, 2),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 1),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 1 },
+	.result = ACCEPT,
+	.retval = 1,
+},
+{
+	"runtime/jit: tail_call out of bounds",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_3, 256),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 2),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 1 },
+	.result = ACCEPT,
+	.retval = 2,
+},
+{
+	"runtime/jit: pass negative index to tail_call",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_3, -1),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 2),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 1 },
+	.result = ACCEPT,
+	.retval = 2,
+},
+{
+	"runtime/jit: pass > 32bit index to tail_call",
+	.insns = {
+	BPF_LD_IMM64(BPF_REG_3, 0x100000000ULL),
+	BPF_LD_MAP_FD(BPF_REG_2, 0),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
+	BPF_MOV64_IMM(BPF_REG_0, 2),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_prog1 = { 2 },
+	.result = ACCEPT,
+	.retval = 42,
+	/* Verifier rewrite for unpriv skips tail call here. */
+	.retval_unpriv = 2,
+},