Commit e21ab36a authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by David S. Miller
Browse files

test: bpf: add a testcase reduced from nmap 



nmap generates classic BPF programs to filter ARP packets with given target MAC
which triggered a bug in eBPF x64 JIT. The bug was fixed in
commit e0ee9c12 ("x86: bpf_jit: fix two bugs in eBPF JIT compiler")
This patch is adding a testcase in eBPF instructions (those that
were generated by classic->eBPF converter) to be processed by JIT.
The test is primarily targeting JIT compiler.

Signed-off-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 342ded40

lib/test_bpf.c

+43 −0
Original line number Diff line number Diff line
@@ -1756,6 +1756,49 @@ static struct bpf_test tests[] = { 
		{ },

		{ { 0, 1 } }

	},

	{

		"nmap reduced",

		.u.insns_int = {

			BPF_MOV64_REG(R6, R1),

			BPF_LD_ABS(BPF_H, 12),

			BPF_JMP_IMM(BPF_JNE, R0, 0x806, 28),

			BPF_LD_ABS(BPF_H, 12),

			BPF_JMP_IMM(BPF_JNE, R0, 0x806, 26),

			BPF_MOV32_IMM(R0, 18),

			BPF_STX_MEM(BPF_W, R10, R0, -64),

			BPF_LDX_MEM(BPF_W, R7, R10, -64),

			BPF_LD_IND(BPF_W, R7, 14),

			BPF_STX_MEM(BPF_W, R10, R0, -60),

			BPF_MOV32_IMM(R0, 280971478),

			BPF_STX_MEM(BPF_W, R10, R0, -56),

			BPF_LDX_MEM(BPF_W, R7, R10, -56),

			BPF_LDX_MEM(BPF_W, R0, R10, -60),

			BPF_ALU32_REG(BPF_SUB, R0, R7),

			BPF_JMP_IMM(BPF_JNE, R0, 0, 15),

			BPF_LD_ABS(BPF_H, 12),

			BPF_JMP_IMM(BPF_JNE, R0, 0x806, 13),

			BPF_MOV32_IMM(R0, 22),

			BPF_STX_MEM(BPF_W, R10, R0, -56),

			BPF_LDX_MEM(BPF_W, R7, R10, -56),

			BPF_LD_IND(BPF_H, R7, 14),

			BPF_STX_MEM(BPF_W, R10, R0, -52),

			BPF_MOV32_IMM(R0, 17366),

			BPF_STX_MEM(BPF_W, R10, R0, -48),

			BPF_LDX_MEM(BPF_W, R7, R10, -48),

			BPF_LDX_MEM(BPF_W, R0, R10, -52),

			BPF_ALU32_REG(BPF_SUB, R0, R7),

			BPF_JMP_IMM(BPF_JNE, R0, 0, 2),

			BPF_MOV32_IMM(R0, 256),

			BPF_EXIT_INSN(),

			BPF_MOV32_IMM(R0, 0),

			BPF_EXIT_INSN(),

		},

		INTERNAL,

		{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0x06, 0, 0,

		  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

		  0x10, 0xbf, 0x48, 0xd6, 0x43, 0xd6},

		{ { 38, 256 } }

	},

};



static struct net_device dev;

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