// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/leak_ptr.c */

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

struct {
        __uint(type, BPF_MAP_TYPE_HASH);
        __uint(max_entries, 1);
        __type(key, long long);
        __type(value, long long);
} map_hash_8b SEC(".maps");

SEC("socket")
__description("leak pointer into ctx 1")
__failure __msg("BPF_ATOMIC stores into R1 ctx is not allowed")
__failure_unpriv __msg_unpriv("R2 leaks addr into mem")
__naked void leak_pointer_into_ctx_1(void)
{
        asm volatile ("                                 \
        r0 = 0;                                         \
        *(u64*)(r1 + %[__sk_buff_cb_0]) = r0;           \
        r2 = %[map_hash_8b] ll;                         \
        lock *(u64 *)(r1 + %[__sk_buff_cb_0]) += r2;    \
        exit;                                           \
"       :
        : __imm_addr(map_hash_8b),
          __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0]))
        : __clobber_all);
}

SEC("socket")
__description("leak pointer into ctx 2")
__failure __msg("BPF_ATOMIC stores into R1 ctx is not allowed")
__failure_unpriv __msg_unpriv("R10 leaks addr into mem")
__naked void leak_pointer_into_ctx_2(void)
{
        asm volatile ("                                 \
        r0 = 0;                                         \
        *(u64*)(r1 + %[__sk_buff_cb_0]) = r0;           \
        lock *(u64 *)(r1 + %[__sk_buff_cb_0]) += r10;   \
        exit;                                           \
"       :
        : __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0]))
        : __clobber_all);
}

SEC("socket")
__description("leak pointer into ctx 3")
__success __failure_unpriv __msg_unpriv("R2 leaks addr into ctx")
__retval(0)
__naked void leak_pointer_into_ctx_3(void)
{
        asm volatile ("                                 \
        r0 = 0;                                         \
        r2 = %[map_hash_8b] ll;                         \
        *(u64*)(r1 + %[__sk_buff_cb_0]) = r2;           \
        exit;                                           \
"       :
        : __imm_addr(map_hash_8b),
          __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0]))
        : __clobber_all);
}

SEC("socket")
__description("leak pointer into map val")
__success __failure_unpriv __msg_unpriv("R6 leaks addr into mem")
__retval(0)
__naked void leak_pointer_into_map_val(void)
{
        asm volatile ("                                 \
        r6 = r1;                                        \
        r1 = 0;                                         \
        *(u64*)(r10 - 8) = r1;                          \
        r2 = r10;                                       \
        r2 += -8;                                       \
        r1 = %[map_hash_8b] ll;                         \
        call %[bpf_map_lookup_elem];                    \
        if r0 == 0 goto l0_%=;                          \
        r3 = 0;                                         \
        *(u64*)(r0 + 0) = r3;                           \
        lock *(u64 *)(r0 + 0) += r6;                    \
l0_%=:  r0 = 0;                                         \
        exit;                                           \
"       :
        : __imm(bpf_map_lookup_elem),
          __imm_addr(map_hash_8b)
        : __clobber_all);
}

char _license[] SEC("license") = "GPL";