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-rw-r--r--lib/test_bpf.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 070bde56474c..c871e0e76c2a 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -435,6 +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;
@@ -5044,6 +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
*/