Commit 08fcb08f authored by Nicolas Schichan's avatar Nicolas Schichan Committed by David S. Miller
Browse files

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: default avatarNicolas Schichan <nschichan@freebox.fr>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d2648d4e

lib/test_bpf.c

+296 −0
Original line number Diff line number Diff line
@@ -4635,6 +4635,302 @@ static struct bpf_test tests[] = { 
		{ {0x40, 0x25051982} },

		.frag_data = { 0x19, 0x82 },

	},

	/*

	 * LD_IND / LD_ABS on non fragmented SKBs

	 */

	{

		/*

		 * this tests that the JIT/interpreter correctly resets X

		 * before using it in an LD_IND instruction.

		 */

		"LD_IND byte default X",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{ [0x1] = 0x42 },

		{ {0x40, 0x42 } },

	},

	{

		"LD_IND byte positive offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),

			BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{ [0x3c] = 0x25, [0x3d] = 0x05,  [0x3e] = 0x19, [0x3f] = 0x82 },

		{ {0x40, 0x82 } },

	},

	{

		"LD_IND byte negative offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),

			BPF_STMT(BPF_LD | BPF_IND | BPF_B, -0x1),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{ [0x3c] = 0x25, [0x3d] = 0x05,  [0x3e] = 0x19, [0x3f] = 0x82 },

		{ {0x40, 0x05 } },

	},

	{

		"LD_IND halfword positive offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_H, 0x2),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

		},

		{ {0x40, 0xdd88 } },

	},

	{

		"LD_IND halfword negative offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x2),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

		},

		{ {0x40, 0xbb66 } },

	},

	{

		"LD_IND halfword unaligned",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x1),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

		},

		{ {0x40, 0x66cc } },

	},

	{

		"LD_IND word positive offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_W, 0x4),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xee99ffaa } },

	},

	{

		"LD_IND word negative offset",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x4),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xaa55bb66 } },

	},

	{

		"LD_IND word unaligned (addr & 3 == 2)",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x2),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xbb66cc77 } },

	},

	{

		"LD_IND word unaligned (addr & 3 == 1)",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x3),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0x55bb66cc } },

	},

	{

		"LD_IND word unaligned (addr & 3 == 3)",

		.u.insns = {

			BPF_STMT(BPF_LDX | BPF_IMM, 0x20),

			BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x1),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0x66cc77dd } },

	},

	{

		"LD_ABS byte",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_B, 0x20),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xcc } },

	},

	{

		"LD_ABS halfword",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x22),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xdd88 } },

	},

	{

		"LD_ABS halfword unaligned",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x25),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0x99ff } },

	},

	{

		"LD_ABS word",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x1c),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xaa55bb66 } },

	},

	{

		"LD_ABS word unaligned (addr & 3 == 2)",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x22),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0xdd88ee99 } },

	},

	{

		"LD_ABS word unaligned (addr & 3 == 1)",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x21),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0x77dd88ee } },

	},

	{

		"LD_ABS word unaligned (addr & 3 == 3)",

		.u.insns = {

			BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x23),

			BPF_STMT(BPF_RET | BPF_A, 0x0),

		},

		CLASSIC,

		{

			[0x1c] = 0xaa, [0x1d] = 0x55,

			[0x1e] = 0xbb, [0x1f] = 0x66,

			[0x20] = 0xcc, [0x21] = 0x77,

			[0x22] = 0xdd, [0x23] = 0x88,

			[0x24] = 0xee, [0x25] = 0x99,

			[0x26] = 0xff, [0x27] = 0xaa,

		},

		{ {0x40, 0x88ee99ff } },

	},

};



static struct net_device dev;

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