c2e39c6bdc
The "positive" part tests all format specifiers when things go well. The "negative" part makes sure that incorrect format strings fail at load time. Signed-off-by: Florent Revest <revest@chromium.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210419155243.1632274-7-revest@chromium.org
20 lines
421 B
C
20 lines
421 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2021 Google LLC. */
|
|
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
|
|
/* The format string is filled from the userspace such that loading fails */
|
|
static const char fmt[10];
|
|
|
|
SEC("raw_tp/sys_enter")
|
|
int handler(const void *ctx)
|
|
{
|
|
unsigned long long arg = 42;
|
|
|
|
bpf_snprintf(NULL, 0, fmt, &arg, sizeof(arg));
|
|
|
|
return 0;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|