root/tools/testing/selftests/bpf/verifier/wide_access.c

   1 #define BPF_SOCK_ADDR_STORE(field, off, res, err) \
   2 { \
   3         "wide store to bpf_sock_addr." #field "[" #off "]", \
   4         .insns = { \
   5         BPF_MOV64_IMM(BPF_REG_0, 1), \
   6         BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, \
   7                     offsetof(struct bpf_sock_addr, field[off])), \
   8         BPF_EXIT_INSN(), \
   9         }, \
  10         .result = res, \
  11         .prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \
  12         .expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \
  13         .errstr = err, \
  14 }
  15 
  16 /* user_ip6[0] is u64 aligned */
  17 BPF_SOCK_ADDR_STORE(user_ip6, 0, ACCEPT,
  18                     NULL),
  19 BPF_SOCK_ADDR_STORE(user_ip6, 1, REJECT,
  20                     "invalid bpf_context access off=12 size=8"),
  21 BPF_SOCK_ADDR_STORE(user_ip6, 2, ACCEPT,
  22                     NULL),
  23 BPF_SOCK_ADDR_STORE(user_ip6, 3, REJECT,
  24                     "invalid bpf_context access off=20 size=8"),
  25 
  26 /* msg_src_ip6[0] is _not_ u64 aligned */
  27 BPF_SOCK_ADDR_STORE(msg_src_ip6, 0, REJECT,
  28                     "invalid bpf_context access off=44 size=8"),
  29 BPF_SOCK_ADDR_STORE(msg_src_ip6, 1, ACCEPT,
  30                     NULL),
  31 BPF_SOCK_ADDR_STORE(msg_src_ip6, 2, REJECT,
  32                     "invalid bpf_context access off=52 size=8"),
  33 BPF_SOCK_ADDR_STORE(msg_src_ip6, 3, REJECT,
  34                     "invalid bpf_context access off=56 size=8"),
  35 
  36 #undef BPF_SOCK_ADDR_STORE
  37 
  38 #define BPF_SOCK_ADDR_LOAD(field, off, res, err) \
  39 { \
  40         "wide load from bpf_sock_addr." #field "[" #off "]", \
  41         .insns = { \
  42         BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, \
  43                     offsetof(struct bpf_sock_addr, field[off])), \
  44         BPF_MOV64_IMM(BPF_REG_0, 1), \
  45         BPF_EXIT_INSN(), \
  46         }, \
  47         .result = res, \
  48         .prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \
  49         .expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \
  50         .errstr = err, \
  51 }
  52 
  53 /* user_ip6[0] is u64 aligned */
  54 BPF_SOCK_ADDR_LOAD(user_ip6, 0, ACCEPT,
  55                    NULL),
  56 BPF_SOCK_ADDR_LOAD(user_ip6, 1, REJECT,
  57                    "invalid bpf_context access off=12 size=8"),
  58 BPF_SOCK_ADDR_LOAD(user_ip6, 2, ACCEPT,
  59                    NULL),
  60 BPF_SOCK_ADDR_LOAD(user_ip6, 3, REJECT,
  61                    "invalid bpf_context access off=20 size=8"),
  62 
  63 /* msg_src_ip6[0] is _not_ u64 aligned */
  64 BPF_SOCK_ADDR_LOAD(msg_src_ip6, 0, REJECT,
  65                    "invalid bpf_context access off=44 size=8"),
  66 BPF_SOCK_ADDR_LOAD(msg_src_ip6, 1, ACCEPT,
  67                    NULL),
  68 BPF_SOCK_ADDR_LOAD(msg_src_ip6, 2, REJECT,
  69                    "invalid bpf_context access off=52 size=8"),
  70 BPF_SOCK_ADDR_LOAD(msg_src_ip6, 3, REJECT,
  71                    "invalid bpf_context access off=56 size=8"),
  72 
  73 #undef BPF_SOCK_ADDR_LOAD