UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

selftests/bpf: Check when bounds are not in the 32-bit range 

Add cases to check if bound is updated correctly when 64-bit value is
not in the 32-bit range.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20230322213056.2470-2-daniel@iogearbox.net
This commit is contained in:
Xu Kuohai 2023-03-22 22:30:56 +01:00 committed by Andrii Nakryiko
parent 7be14c1c90
commit 1a3148fc17
1 changed files with 121 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
tools/testing/selftests/bpf/verifier/bounds.c
View File

@ -753,3 +753,124 @@
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"bound check with JMP_JLT for crossing 64-bit signed boundary",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10),
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
/* r1 unsigned range is [0x7fffffffffffff10, 0x800000000000000f] */
BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"bound check with JMP_JSLT for crossing 64-bit signed boundary",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10),
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
/* r1 signed range is [S64_MIN, S64_MAX] */
BPF_JMP_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "BPF program is too large",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"bound check for loop upper bound greater than U32_MAX",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_LD_IMM64(BPF_REG_0, 0x100000000),
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
BPF_LD_IMM64(BPF_REG_0, 0x100000000),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"bound check with JMP32_JLT for crossing 32-bit signed boundary",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 6),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10),
BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
BPF_MOV32_IMM(BPF_REG_0, 0x80000000),
BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1),
/* r1 unsigned range is [0, 0x8000000f] */
BPF_JMP32_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"bound check with JMP32_JSLT for crossing 32-bit signed boundary",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 6),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10),
BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
BPF_MOV32_IMM(BPF_REG_0, 0x80000000),
BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1),
/* r1 signed range is [S32_MIN, S32_MAX] */
BPF_JMP32_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "BPF program is too large",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_XDP,
},