#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
SEC("cgroup/skb")
__description("direct packet read test#1 for CGROUP_SKB")
__success __failure_unpriv
__msg_unpriv("invalid bpf_context access off=76 size=4")
__retval(0)
__naked void test_1_for_cgroup_skb(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r4 = *(u32*)(r1 + %[__sk_buff_len]); \
r5 = *(u32*)(r1 + %[__sk_buff_pkt_type]); \
r6 = *(u32*)(r1 + %[__sk_buff_mark]); \
*(u32*)(r1 + %[__sk_buff_mark]) = r6; \
r7 = *(u32*)(r1 + %[__sk_buff_queue_mapping]); \
r8 = *(u32*)(r1 + %[__sk_buff_protocol]); \
r9 = *(u32*)(r1 + %[__sk_buff_vlan_present]); \
r0 = r2; \
r0 += 8; \
if r0 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)),
__imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)),
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
__imm_const(__sk_buff_pkt_type, offsetof(struct __sk_buff, pkt_type)),
__imm_const(__sk_buff_protocol, offsetof(struct __sk_buff, protocol)),
__imm_const(__sk_buff_queue_mapping, offsetof(struct __sk_buff, queue_mapping)),
__imm_const(__sk_buff_vlan_present, offsetof(struct __sk_buff, vlan_present))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#2 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_2_for_cgroup_skb(void)
{
asm volatile (" \
r4 = *(u32*)(r1 + %[__sk_buff_vlan_tci]); \
r5 = *(u32*)(r1 + %[__sk_buff_vlan_proto]); \
r6 = *(u32*)(r1 + %[__sk_buff_priority]); \
*(u32*)(r1 + %[__sk_buff_priority]) = r6; \
r7 = *(u32*)(r1 + %[__sk_buff_ingress_ifindex]);\
r8 = *(u32*)(r1 + %[__sk_buff_tc_index]); \
r9 = *(u32*)(r1 + %[__sk_buff_hash]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_hash, offsetof(struct __sk_buff, hash)),
__imm_const(__sk_buff_ingress_ifindex, offsetof(struct __sk_buff, ingress_ifindex)),
__imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)),
__imm_const(__sk_buff_tc_index, offsetof(struct __sk_buff, tc_index)),
__imm_const(__sk_buff_vlan_proto, offsetof(struct __sk_buff, vlan_proto)),
__imm_const(__sk_buff_vlan_tci, offsetof(struct __sk_buff, vlan_tci))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#3 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_3_for_cgroup_skb(void)
{
asm volatile (" \
r4 = *(u32*)(r1 + %[__sk_buff_cb_0]); \
r5 = *(u32*)(r1 + %[__sk_buff_cb_1]); \
r6 = *(u32*)(r1 + %[__sk_buff_cb_2]); \
r7 = *(u32*)(r1 + %[__sk_buff_cb_3]); \
r8 = *(u32*)(r1 + %[__sk_buff_cb_4]); \
r9 = *(u32*)(r1 + %[__sk_buff_napi_id]); \
*(u32*)(r1 + %[__sk_buff_cb_0]) = r4; \
*(u32*)(r1 + %[__sk_buff_cb_1]) = r5; \
*(u32*)(r1 + %[__sk_buff_cb_2]) = r6; \
*(u32*)(r1 + %[__sk_buff_cb_3]) = r7; \
*(u32*)(r1 + %[__sk_buff_cb_4]) = r8; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])),
__imm_const(__sk_buff_cb_1, offsetof(struct __sk_buff, cb[1])),
__imm_const(__sk_buff_cb_2, offsetof(struct __sk_buff, cb[2])),
__imm_const(__sk_buff_cb_3, offsetof(struct __sk_buff, cb[3])),
__imm_const(__sk_buff_cb_4, offsetof(struct __sk_buff, cb[4])),
__imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#4 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_4_for_cgroup_skb(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_family]); \
r3 = *(u32*)(r1 + %[__sk_buff_remote_ip4]); \
r4 = *(u32*)(r1 + %[__sk_buff_local_ip4]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_0]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_1]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_2]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_3]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_0]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_1]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_2]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_3]); \
r7 = *(u32*)(r1 + %[__sk_buff_remote_port]); \
r8 = *(u32*)(r1 + %[__sk_buff_local_port]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_family, offsetof(struct __sk_buff, family)),
__imm_const(__sk_buff_local_ip4, offsetof(struct __sk_buff, local_ip4)),
__imm_const(__sk_buff_local_ip6_0, offsetof(struct __sk_buff, local_ip6[0])),
__imm_const(__sk_buff_local_ip6_1, offsetof(struct __sk_buff, local_ip6[1])),
__imm_const(__sk_buff_local_ip6_2, offsetof(struct __sk_buff, local_ip6[2])),
__imm_const(__sk_buff_local_ip6_3, offsetof(struct __sk_buff, local_ip6[3])),
__imm_const(__sk_buff_local_port, offsetof(struct __sk_buff, local_port)),
__imm_const(__sk_buff_remote_ip4, offsetof(struct __sk_buff, remote_ip4)),
__imm_const(__sk_buff_remote_ip6_0, offsetof(struct __sk_buff, remote_ip6[0])),
__imm_const(__sk_buff_remote_ip6_1, offsetof(struct __sk_buff, remote_ip6[1])),
__imm_const(__sk_buff_remote_ip6_2, offsetof(struct __sk_buff, remote_ip6[2])),
__imm_const(__sk_buff_remote_ip6_3, offsetof(struct __sk_buff, remote_ip6[3])),
__imm_const(__sk_buff_remote_port, offsetof(struct __sk_buff, remote_port))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of tc_classid for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void tc_classid_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_tc_classid]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tc_classid, offsetof(struct __sk_buff, tc_classid))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of data_meta for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void data_meta_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_data_meta]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_data_meta, offsetof(struct __sk_buff, data_meta))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of flow_keys for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void flow_keys_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_flow_keys]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_flow_keys, offsetof(struct __sk_buff, flow_keys))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid write access to napi_id for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void napi_id_for_cgroup_skb(void)
{
asm volatile (" \
r9 = *(u32*)(r1 + %[__sk_buff_napi_id]); \
*(u32*)(r1 + %[__sk_buff_napi_id]) = r9; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
: __clobber_all);
}
SEC("cgroup/skb")
__description("write tstamp from CGROUP_SKB")
__success __failure_unpriv
__msg_unpriv("invalid bpf_context access off=152 size=8")
__retval(0)
__naked void write_tstamp_from_cgroup_skb(void)
{
asm volatile (" \
r0 = 0; \
*(u64*)(r1 + %[__sk_buff_tstamp]) = r0; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
: __clobber_all);
}
SEC("cgroup/skb")
__description("read tstamp from CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void read_tstamp_from_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u64*)(r1 + %[__sk_buff_tstamp]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
