77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
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{
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"check valid spill/fill",
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.insns = {
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/* spill R1(ctx) into stack */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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/* fill it back into R2 */
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BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
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/* should be able to access R0 = *(R2 + 8) */
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/* BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8), */
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R0 leaks addr",
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.result = ACCEPT,
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.result_unpriv = REJECT,
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.retval = POINTER_VALUE,
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},
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{
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"check valid spill/fill, skb mark",
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.insns = {
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BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1),
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8),
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,
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offsetof(struct __sk_buff, mark)),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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.result_unpriv = ACCEPT,
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},
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{
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"check corrupted spill/fill",
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.insns = {
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/* spill R1(ctx) into stack */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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/* mess up with R1 pointer on stack */
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BPF_ST_MEM(BPF_B, BPF_REG_10, -7, 0x23),
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/* fill back into R0 is fine for priv.
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* R0 now becomes SCALAR_VALUE.
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*/
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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/* Load from R0 should fail. */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "attempt to corrupt spilled",
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.errstr = "R0 invalid mem access 'inv",
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.result = REJECT,
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.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
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},
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{
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"check corrupted spill/fill, LSB",
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.insns = {
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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BPF_ST_MEM(BPF_H, BPF_REG_10, -8, 0xcafe),
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "attempt to corrupt spilled",
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.result_unpriv = REJECT,
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.result = ACCEPT,
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.retval = POINTER_VALUE,
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},
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{
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"check corrupted spill/fill, MSB",
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.insns = {
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x12345678),
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "attempt to corrupt spilled",
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.result_unpriv = REJECT,
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.result = ACCEPT,
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.retval = POINTER_VALUE,
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},
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