mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-04-08 12:02:33 +02:00
18cb268535
[ Upstream commita679e5683d] Fix -Wunused-result warning generated when compiled with gcc 13.3.0, by checking fread's return value and handling errors, preventing potential failures when reading from stdin. Fixes compiler warning: warning: ignoring return value of 'fread' declared with attribute 'warn_unused_result' [-Wunused-result] Fixes:806a15b254("kselftests/arm64: add PAuth test for whether exec() changes keys") Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
40 lines
883 B
C
40 lines
883 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2020 ARM Limited
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/auxv.h>
|
|
|
|
#include "helper.h"
|
|
|
|
int main(void)
|
|
{
|
|
struct signatures signed_vals;
|
|
unsigned long hwcaps;
|
|
size_t val;
|
|
|
|
size_t size = fread(&val, sizeof(size_t), 1, stdin);
|
|
|
|
if (size != 1) {
|
|
fprintf(stderr, "Could not read input from stdin\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/* don't try to execute illegal (unimplemented) instructions) caller
|
|
* should have checked this and keep worker simple
|
|
*/
|
|
hwcaps = getauxval(AT_HWCAP);
|
|
|
|
if (hwcaps & HWCAP_PACA) {
|
|
signed_vals.keyia = keyia_sign(val);
|
|
signed_vals.keyib = keyib_sign(val);
|
|
signed_vals.keyda = keyda_sign(val);
|
|
signed_vals.keydb = keydb_sign(val);
|
|
}
|
|
signed_vals.keyg = (hwcaps & HWCAP_PACG) ? keyg_sign(val) : 0;
|
|
|
|
fwrite(&signed_vals, sizeof(struct signatures), 1, stdout);
|
|
|
|
return 0;
|
|
}
|