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// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/prevent_map_lookup.c */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
struct {
__uint(type, BPF_MAP_TYPE_STACK_TRACE);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, __u64);
} map_stacktrace SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(max_entries, 8);
__uint(key_size, sizeof(int));
__array(values, void (void));
} map_prog2_socket SEC(".maps");
SEC("perf_event")
__description("prevent map lookup in stack trace")
__failure __msg("cannot pass map_type 7 into func bpf_map_lookup_elem")
__naked void map_lookup_in_stack_trace(void)
{
asm volatile (" \
r1 = 0; \
*(u64*)(r10 - 8) = r1; \
r2 = r10; \
r2 += -8; \
r1 = %[map_stacktrace] ll; \
call %[bpf_map_lookup_elem]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_stacktrace)
: __clobber_all);
}
SEC("socket")
__description("prevent map lookup in prog array")
__failure __msg("cannot pass map_type 3 into func bpf_map_lookup_elem")
__failure_unpriv
__naked void map_lookup_in_prog_array(void)
{
asm volatile (" \
r1 = 0; \
*(u64*)(r10 - 8) = r1; \
r2 = r10; \
r2 += -8; \
r1 = %[map_prog2_socket] ll; \
call %[bpf_map_lookup_elem]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_prog2_socket)
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
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