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Commit be69483b authored by Eric Dumazet's avatar Eric Dumazet Committed by Alexei Starovoitov
Browse files

selftests/bpf: add another gso_segs access 



Use BPF_REG_1 for source and destination of gso_segs read,
to exercise "bpf: fix access to skb_shared_info->gso_segs" fix.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Suggested-by: default avatarStanislav Fomichev <sdf@google.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 06a22d89

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

+11 −0
Original line number Diff line number Diff line
@@ -974,6 +974,17 @@ 
	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,

},

{

	"read gso_segs from CGROUP_SKB",

	.insns = {

	BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,

		    offsetof(struct __sk_buff, gso_segs)),

	BPF_MOV64_IMM(BPF_REG_0, 0),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,

},

{

	"write gso_segs from CGROUP_SKB",

	.insns = {