40f2fbd5a5
Break up the first 10 kLoC of test verifier test cases out into smaller files. Looks like git line counting gets a little flismy above 16 bit integers, so we need two commits to break up test_verifier. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jiong Wang <jiong.wang@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
{
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"variable-offset ctx access",
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.insns = {
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/* Get an unknown value */
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 0),
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/* Make it small and 4-byte aligned */
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BPF_ALU64_IMM(BPF_AND, BPF_REG_2, 4),
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/* add it to skb. We now have either &skb->len or
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* &skb->pkt_type, but we don't know which
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*/
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
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/* dereference it */
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "variable ctx access var_off=(0x0; 0x4)",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_LWT_IN,
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},
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{
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"variable-offset stack access",
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.insns = {
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/* Fill the top 8 bytes of the stack */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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/* Get an unknown value */
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 0),
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/* Make it small and 4-byte aligned */
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BPF_ALU64_IMM(BPF_AND, BPF_REG_2, 4),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_2, 8),
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/* add it to fp. We now have either fp-4 or fp-8, but
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* we don't know which
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*/
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BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_10),
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/* dereference it */
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "variable stack access var_off=(0xfffffffffffffff8; 0x4)",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_LWT_IN,
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},
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{
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"indirect variable-offset stack access",
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.insns = {
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/* Fill the top 8 bytes of the stack */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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/* Get an unknown value */
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 0),
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/* Make it small and 4-byte aligned */
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BPF_ALU64_IMM(BPF_AND, BPF_REG_2, 4),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_2, 8),
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/* add it to fp. We now have either fp-4 or fp-8, but
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* we don't know which
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*/
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BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_10),
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/* dereference it indirectly */
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.fixup_map_hash_8b = { 5 },
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.errstr = "variable stack read R2",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_LWT_IN,
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},
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