Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 189 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/verifier/lwt.c b/tools/testing/selftests/bpf/verifier/lwt.c
new file mode 100644
index 000000000..2cab6a396
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/lwt.c
@@ -0,0 +1,189 @@
+{
+	"invalid direct packet write for LWT_IN",
+	.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_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_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.errstr = "cannot write into packet",
+	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_LWT_IN,
+},
+{
+	"invalid direct packet write for LWT_OUT",
+	.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_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_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.errstr = "cannot write into packet",
+	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_LWT_OUT,
+},
+{
+	"direct packet write for LWT_XMIT",
+	.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_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_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_LWT_XMIT,
+},
+{
+	"direct packet read for LWT_IN",
+	.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_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,
+	.prog_type = BPF_PROG_TYPE_LWT_IN,
+},
+{
+	"direct packet read for LWT_OUT",
+	.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_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,
+	.prog_type = BPF_PROG_TYPE_LWT_OUT,
+},
+{
+	"direct packet read for LWT_XMIT",
+	.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_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,
+	.prog_type = BPF_PROG_TYPE_LWT_XMIT,
+},
+{
+	"overlapping checks for direct packet access",
+	.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_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, 4),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 6),
+	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 1),
+	BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_2, 6),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_LWT_XMIT,
+},
+{
+	"make headroom for LWT_XMIT",
+	.insns = {
+	BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
+	BPF_MOV64_IMM(BPF_REG_2, 34),
+	BPF_MOV64_IMM(BPF_REG_3, 0),
+	BPF_EMIT_CALL(BPF_FUNC_skb_change_head),
+	/* split for s390 to succeed */
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
+	BPF_MOV64_IMM(BPF_REG_2, 42),
+	BPF_MOV64_IMM(BPF_REG_3, 0),
+	BPF_EMIT_CALL(BPF_FUNC_skb_change_head),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_LWT_XMIT,
+},
+{
+	"invalid access of tc_classid for LWT_IN",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+		    offsetof(struct __sk_buff, tc_classid)),
+	BPF_EXIT_INSN(),
+	},
+	.result = REJECT,
+	.errstr = "invalid bpf_context access",
+},
+{
+	"invalid access of tc_classid for LWT_OUT",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+		    offsetof(struct __sk_buff, tc_classid)),
+	BPF_EXIT_INSN(),
+	},
+	.result = REJECT,
+	.errstr = "invalid bpf_context access",
+},
+{
+	"invalid access of tc_classid for LWT_XMIT",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+		    offsetof(struct __sk_buff, tc_classid)),
+	BPF_EXIT_INSN(),
+	},
+	.result = REJECT,
+	.errstr = "invalid bpf_context access",
+},
+{
+	"check skb->tc_classid half load not permitted for lwt prog",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+	BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+		    offsetof(struct __sk_buff, tc_classid)),
+#else
+	BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+		    offsetof(struct __sk_buff, tc_classid) + 2),
+#endif
+	BPF_EXIT_INSN(),
+	},
+	.result = REJECT,
+	.errstr = "invalid bpf_context access",
+	.prog_type = BPF_PROG_TYPE_LWT_IN,
+},