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-rw-r--r--lib/test_bpf.c59
1 files changed, 57 insertions, 2 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index be88cbaadde3..d9d5a410955c 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -84,6 +84,7 @@ struct bpf_test {
} test[MAX_SUBTESTS];
int (*fill_helper)(struct bpf_test *self);
__u8 frag_data[MAX_DATA];
+ int stack_depth; /* for eBPF only, since tests don't call verifier */
};
/* Large test cases need separate allocation and fill handler. */
@@ -434,6 +435,30 @@ loop:
return 0;
}
+static int bpf_fill_jump_around_ld_abs(struct bpf_test *self)
+{
+ unsigned int len = BPF_MAXINSNS;
+ struct bpf_insn *insn;
+ int i = 0;
+
+ insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
+ if (!insn)
+ return -ENOMEM;
+
+ insn[i++] = BPF_MOV64_REG(R6, R1);
+ insn[i++] = BPF_LD_ABS(BPF_B, 0);
+ insn[i] = BPF_JMP_IMM(BPF_JEQ, R0, 10, len - i - 2);
+ i++;
+ while (i < len - 1)
+ insn[i++] = BPF_LD_ABS(BPF_B, 1);
+ insn[i] = BPF_EXIT_INSN();
+
+ self->u.ptr.insns = insn;
+ self->u.ptr.len = len;
+
+ return 0;
+}
+
static int __bpf_fill_stxdw(struct bpf_test *self, int size)
{
unsigned int len = BPF_MAXINSNS;
@@ -455,6 +480,7 @@ static int __bpf_fill_stxdw(struct bpf_test *self, int size)
self->u.ptr.insns = insn;
self->u.ptr.len = len;
+ self->stack_depth = 40;
return 0;
}
@@ -2317,7 +2343,8 @@ static struct bpf_test tests[] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0x06, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0x10, 0xbf, 0x48, 0xd6, 0x43, 0xd6},
- { { 38, 256 } }
+ { { 38, 256 } },
+ .stack_depth = 64,
},
/* BPF_ALU | BPF_MOV | BPF_X */
{
@@ -4169,6 +4196,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xff } },
+ .stack_depth = 40,
},
{
"ST_MEM_B: Store/Load byte: max positive",
@@ -4181,6 +4209,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x7f } },
+ .stack_depth = 40,
},
{
"STX_MEM_B: Store/Load byte: max negative",
@@ -4194,6 +4223,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xff } },
+ .stack_depth = 40,
},
{
"ST_MEM_H: Store/Load half word: max negative",
@@ -4206,6 +4236,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffff } },
+ .stack_depth = 40,
},
{
"ST_MEM_H: Store/Load half word: max positive",
@@ -4218,6 +4249,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x7fff } },
+ .stack_depth = 40,
},
{
"STX_MEM_H: Store/Load half word: max negative",
@@ -4231,6 +4263,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffff } },
+ .stack_depth = 40,
},
{
"ST_MEM_W: Store/Load word: max negative",
@@ -4243,6 +4276,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffffffff } },
+ .stack_depth = 40,
},
{
"ST_MEM_W: Store/Load word: max positive",
@@ -4255,6 +4289,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x7fffffff } },
+ .stack_depth = 40,
},
{
"STX_MEM_W: Store/Load word: max negative",
@@ -4268,6 +4303,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffffffff } },
+ .stack_depth = 40,
},
{
"ST_MEM_DW: Store/Load double word: max negative",
@@ -4280,6 +4316,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffffffff } },
+ .stack_depth = 40,
},
{
"ST_MEM_DW: Store/Load double word: max negative 2",
@@ -4297,6 +4334,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x1 } },
+ .stack_depth = 40,
},
{
"ST_MEM_DW: Store/Load double word: max positive",
@@ -4309,6 +4347,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x7fffffff } },
+ .stack_depth = 40,
},
{
"STX_MEM_DW: Store/Load double word: max negative",
@@ -4322,6 +4361,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0xffffffff } },
+ .stack_depth = 40,
},
/* BPF_STX | BPF_XADD | BPF_W/DW */
{
@@ -4336,6 +4376,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x22 } },
+ .stack_depth = 40,
},
{
"STX_XADD_W: Test side-effects, r10: 0x12 + 0x10 = 0x22",
@@ -4351,6 +4392,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0 } },
+ .stack_depth = 40,
},
{
"STX_XADD_W: Test side-effects, r0: 0x12 + 0x10 = 0x22",
@@ -4363,6 +4405,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x12 } },
+ .stack_depth = 40,
},
{
"STX_XADD_W: X + 1 + 1 + 1 + ...",
@@ -4384,6 +4427,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x22 } },
+ .stack_depth = 40,
},
{
"STX_XADD_DW: Test side-effects, r10: 0x12 + 0x10 = 0x22",
@@ -4399,6 +4443,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0 } },
+ .stack_depth = 40,
},
{
"STX_XADD_DW: Test side-effects, r0: 0x12 + 0x10 = 0x22",
@@ -4411,6 +4456,7 @@ static struct bpf_test tests[] = {
INTERNAL,
{ },
{ { 0, 0x12 } },
+ .stack_depth = 40,
},
{
"STX_XADD_DW: X + 1 + 1 + 1 + ...",
@@ -5022,6 +5068,14 @@ static struct bpf_test tests[] = {
{ { ETH_HLEN, 0xbef } },
.fill_helper = bpf_fill_ld_abs_vlan_push_pop,
},
+ {
+ "BPF_MAXINSNS: jump around ld_abs",
+ { },
+ INTERNAL,
+ { 10, 11 },
+ { { 2, 10 } },
+ .fill_helper = bpf_fill_jump_around_ld_abs,
+ },
/*
* LD_IND / LD_ABS on fragmented SKBs
*/
@@ -5663,7 +5717,7 @@ static struct sk_buff *populate_skb(char *buf, int size)
if (!skb)
return NULL;
- memcpy(__skb_put(skb, size), buf, size);
+ __skb_put_data(skb, buf, size);
/* Initialize a fake skb with test pattern. */
skb_reset_mac_header(skb);
@@ -5809,6 +5863,7 @@ static struct bpf_prog *generate_filter(int which, int *err)
/* Type doesn't really matter here as long as it's not unspec. */
fp->type = BPF_PROG_TYPE_SOCKET_FILTER;
memcpy(fp->insnsi, fptr, fp->len * sizeof(struct bpf_insn));
+ fp->aux->stack_depth = tests[which].stack_depth;
/* We cannot error here as we don't need type compatibility
* checks.