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69f409469c
The addition of general support for unprivileged tests in test_loader.c breaks building test_verifier on non-glibc (e.g. musl) systems, due to the inclusion of glibc extension '<error.h>' in 'unpriv_helpers.c'. However, the header is actually not needed, so remove it to restore building. Similarly for sk_lookup.c and flow_dissector.c, error.h is not necessary and causes problems, so drop them. Fixes:1d56ade032("selftests/bpf: Unprivileged tests for test_loader.c") Fixes:0ab5539f85("selftests/bpf: Tests for BPF_SK_LOOKUP attach point") Fixes:0905beec9f("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/5664367edf5fea4f3f4b4aec3b182bcfc6edff9c.1721713597.git.tony.ambardar@gmail.com
57 lines
1.0 KiB
C
57 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "unpriv_helpers.h"
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static bool get_mitigations_off(void)
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{
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char cmdline[4096], *c;
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int fd, ret = false;
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fd = open("/proc/cmdline", O_RDONLY);
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if (fd < 0) {
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perror("open /proc/cmdline");
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return false;
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}
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if (read(fd, cmdline, sizeof(cmdline) - 1) < 0) {
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perror("read /proc/cmdline");
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goto out;
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}
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cmdline[sizeof(cmdline) - 1] = '\0';
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for (c = strtok(cmdline, " \n"); c; c = strtok(NULL, " \n")) {
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if (strncmp(c, "mitigations=off", strlen(c)))
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continue;
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ret = true;
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break;
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}
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out:
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close(fd);
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return ret;
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}
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bool get_unpriv_disabled(void)
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{
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bool disabled;
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char buf[2];
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FILE *fd;
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fd = fopen("/proc/sys/" UNPRIV_SYSCTL, "r");
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if (fd) {
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disabled = (fgets(buf, 2, fd) == buf && atoi(buf));
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fclose(fd);
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} else {
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perror("fopen /proc/sys/" UNPRIV_SYSCTL);
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disabled = true;
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}
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return disabled ? true : get_mitigations_off();
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}
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