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// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include "bpf_misc.h"
SEC("lsm_cgroup/socket_create")
__description("lsm_cgroup bpf_set_retval success")
__success
int BPF_PROG(lsm_cgroup_set_retval_zero_valid, int family, int type, int protocol, int kern)
{
bpf_set_retval(0);
return 0;
}
SEC("lsm_cgroup/socket_create")
__description("lsm_cgroup bpf_set_retval valid errno")
__success
int BPF_PROG(lsm_cgroup_set_retval_negative_valid, int family, int type, int protocol, int kern)
{
bpf_set_retval(-12);
return 0;
}
SEC("lsm_cgroup/socket_create")
__description("lsm_cgroup bpf_set_retval invalid negative value")
__failure __msg("should have been in [-4095, 0]")
int BPF_PROG(lsm_cgroup_set_retval_negative_invalid, int family, int type, int protocol, int kern)
{
bpf_set_retval(-4096);
return 0;
}
SEC("lsm_cgroup/socket_create")
__description("lsm_cgroup bpf_set_retval invalid positive value")
__failure __msg("should have been in [-4095, 0]")
int BPF_PROG(lsm_cgroup_set_retval_positive_invalid, int family, int type, int protocol, int kern)
{
bpf_set_retval(1);
return 0;
}
SEC("cgroup/dev")
__description("cgroup_device bpf_set_retval success")
__success
int cgroup_dev_set_retval_0(struct bpf_cgroup_dev_ctx *ctx)
{
bpf_set_retval(0);
return 1;
}
SEC("cgroup/dev")
__description("cgroup_device bpf_set_retval valid errno")
__success
int cgroup_dev_set_retval_neg_maxerrno(struct bpf_cgroup_dev_ctx *ctx)
{
bpf_set_retval(-4095);
return 1;
}
SEC("cgroup/dev")
__description("cgroup_device bpf_set_retval invalid positive value")
__failure __msg("should have been in [-4095, 0]")
int cgroup_dev_set_retval_1(struct bpf_cgroup_dev_ctx *ctx)
{
bpf_set_retval(1);
return 1;
}
SEC("cgroup/dev")
__description("cgroup_device bpf_set_retval invalid negative value")
__failure __msg("should have been in [-4095, 0]")
int cgroup_dev_set_retval_neg_4096(struct bpf_cgroup_dev_ctx *ctx)
{
bpf_set_retval(-4096);
return 1;
}
SEC("cgroup/dev")
__description("bpf_set_retval bounds check survives state pruning")
__failure __msg("should have been in [-4095, 0]")
__naked int cgroup_dev_set_retval_pruning_bypass(struct bpf_cgroup_dev_ctx *ctx)
{
asm volatile (
"call %[bpf_get_prandom_u32];"
"if r0 != 0 goto 1f;"
"r0 = r0;"
"r0 = r0;"
"r0 = r0;"
"r0 = r0;"
"goto 2f;"
"1:"
"call %[bpf_get_prandom_u32];"
"2:"
"r1 = r0;"
"call %[bpf_set_retval];"
"r0 = 1;"
"exit;"
:
: __imm(bpf_get_prandom_u32),
__imm(bpf_set_retval)
: __clobber_common
);
}
char _license[] SEC("license") = "GPL";
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