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test_bpf: add more tests for LD_ABS and LD_IND.
This exerces the LD_ABS and LD_IND instructions for various sizes and alignments. This also checks that X when used as an offset to a BPF_IND instruction first in a filter is correctly set to 0. Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Schichan
David S. Miller
parent
d2648d4e26
commit
08fcb08fc0
296
lib/test_bpf.c
296
lib/test_bpf.c
@ -4635,6 +4635,302 @@ static struct bpf_test tests[] = {
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{ {0x40, 0x25051982} },
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.frag_data = { 0x19, 0x82 },
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},
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/*
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* LD_IND / LD_ABS on non fragmented SKBs
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*/
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{
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/*
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* this tests that the JIT/interpreter correctly resets X
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* before using it in an LD_IND instruction.
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*/
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"LD_IND byte default X",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{ [0x1] = 0x42 },
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{ {0x40, 0x42 } },
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},
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{
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"LD_IND byte positive offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),
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BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{ [0x3c] = 0x25, [0x3d] = 0x05, [0x3e] = 0x19, [0x3f] = 0x82 },
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{ {0x40, 0x82 } },
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},
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{
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"LD_IND byte negative offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),
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BPF_STMT(BPF_LD | BPF_IND | BPF_B, -0x1),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{ [0x3c] = 0x25, [0x3d] = 0x05, [0x3e] = 0x19, [0x3f] = 0x82 },
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{ {0x40, 0x05 } },
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},
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{
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"LD_IND halfword positive offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_H, 0x2),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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},
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{ {0x40, 0xdd88 } },
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},
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{
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"LD_IND halfword negative offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x2),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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},
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{ {0x40, 0xbb66 } },
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},
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{
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"LD_IND halfword unaligned",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x1),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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},
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{ {0x40, 0x66cc } },
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},
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{
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"LD_IND word positive offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_W, 0x4),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xee99ffaa } },
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},
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{
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"LD_IND word negative offset",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x4),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xaa55bb66 } },
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},
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{
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"LD_IND word unaligned (addr & 3 == 2)",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x2),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xbb66cc77 } },
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},
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{
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"LD_IND word unaligned (addr & 3 == 1)",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x3),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0x55bb66cc } },
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},
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{
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"LD_IND word unaligned (addr & 3 == 3)",
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.u.insns = {
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BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
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BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x1),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0x66cc77dd } },
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},
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{
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"LD_ABS byte",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_B, 0x20),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xcc } },
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},
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{
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"LD_ABS halfword",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x22),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xdd88 } },
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},
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{
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"LD_ABS halfword unaligned",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x25),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0x99ff } },
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},
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{
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"LD_ABS word",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x1c),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xaa55bb66 } },
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},
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{
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"LD_ABS word unaligned (addr & 3 == 2)",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x22),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0xdd88ee99 } },
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},
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{
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"LD_ABS word unaligned (addr & 3 == 1)",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x21),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0x77dd88ee } },
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},
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{
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"LD_ABS word unaligned (addr & 3 == 3)",
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.u.insns = {
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BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x23),
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BPF_STMT(BPF_RET | BPF_A, 0x0),
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},
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CLASSIC,
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{
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[0x1c] = 0xaa, [0x1d] = 0x55,
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[0x1e] = 0xbb, [0x1f] = 0x66,
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[0x20] = 0xcc, [0x21] = 0x77,
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[0x22] = 0xdd, [0x23] = 0x88,
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[0x24] = 0xee, [0x25] = 0x99,
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[0x26] = 0xff, [0x27] = 0xaa,
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},
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{ {0x40, 0x88ee99ff } },
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},
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};
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static struct net_device dev;
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