Commit 2b070c2b authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
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selftests/bpf: Add test to access int ptr argument in tracing program 



Adding verifier test for accessing int pointer argument in
tracing programs.

The test program loads 2nd argument of bpf_modify_return_test
function which is int pointer and checks that verifier allows
that.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211208193245.172141-3-jolsa@kernel.org
parent bb6728d7

tools/testing/selftests/bpf/verifier/btf_ctx_access.c

0 → 100644
+12 −0
Original line number Diff line number Diff line 
{

	"btf_ctx_access accept",

	.insns = {

	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 8),	/* load 2nd argument value (int pointer) */

	BPF_MOV64_IMM(BPF_REG_0, 0),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_TRACING,

	.expected_attach_type = BPF_TRACE_FENTRY,

	.kfunc = "bpf_modify_return_test",

},