mirror of
https://github.com/torvalds/linux.git
synced 2026-06-01 02:53:36 +02:00
784cdf9315
Introducing selftests for validating file-backed dynptr works as expected. * validate implementation supports dynptr slice and read operations * validate destructors should be paired with initializers * validate sleepable progs can page in. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Reviewed-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251026203853.135105-11-mykyta.yatsenko5@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
|
|
|
|
#include <vmlinux.h>
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
#include "bpf_misc.h"
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
int err;
|
|
void *user_ptr;
|
|
|
|
SEC("lsm/file_open")
|
|
__failure
|
|
__msg("Unreleased reference id=")
|
|
int on_nanosleep_unreleased_ref(void *ctx)
|
|
{
|
|
struct task_struct *task = bpf_get_current_task_btf();
|
|
struct file *file = bpf_get_task_exe_file(task);
|
|
struct bpf_dynptr dynptr;
|
|
|
|
if (!file)
|
|
return 0;
|
|
|
|
err = bpf_dynptr_from_file(file, 0, &dynptr);
|
|
return err ? 1 : 0;
|
|
}
|
|
|
|
SEC("xdp")
|
|
__failure
|
|
__msg("Expected a dynptr of type file as arg #0")
|
|
int xdp_wrong_dynptr_type(struct xdp_md *xdp)
|
|
{
|
|
struct bpf_dynptr dynptr;
|
|
|
|
bpf_dynptr_from_xdp(xdp, 0, &dynptr);
|
|
bpf_dynptr_file_discard(&dynptr);
|
|
return 0;
|
|
}
|
|
|
|
SEC("xdp")
|
|
__failure
|
|
__msg("Expected an initialized dynptr as arg #0")
|
|
int xdp_no_dynptr_type(struct xdp_md *xdp)
|
|
{
|
|
struct bpf_dynptr dynptr;
|
|
|
|
bpf_dynptr_file_discard(&dynptr);
|
|
return 0;
|
|
}
|