^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #define _GNU_SOURCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <sys/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <sys/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <sys/user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "linux/ptrace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static int sys_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *uinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) return syscall(SYS_rt_sigqueueinfo, tgid, sig, uinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int sys_rt_tgsigqueueinfo(pid_t tgid, pid_t tid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int sig, siginfo_t *uinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return syscall(SYS_rt_tgsigqueueinfo, tgid, tid, sig, uinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int sys_ptrace(int request, pid_t pid, void *addr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return syscall(SYS_ptrace, request, pid, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define SIGNR 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define TEST_SICODE_PRIV -1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define TEST_SICODE_SHARE -2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #ifndef PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define PAGE_SIZE sysconf(_SC_PAGESIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define err(fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) fprintf(stderr, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) "Error (%s:%d): " fmt, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) __FILE__, __LINE__, ##__VA_ARGS__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int check_error_paths(pid_t child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct ptrace_peeksiginfo_args arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) int ret, exit_code = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void *addr_rw, *addr_ro;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * Allocate two contiguous pages. The first one is for read-write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * another is for read-only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) addr_rw = mmap(NULL, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (addr_rw == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) err("mmap() failed: %m\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) addr_ro = mmap(addr_rw + PAGE_SIZE, PAGE_SIZE, PROT_READ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (addr_ro == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) err("mmap() failed: %m\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) arg.nr = SIGNR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) arg.off = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* Unsupported flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) arg.flags = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_rw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (ret != -1 || errno != EINVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) err("sys_ptrace() returns %d (expected -1),"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) " errno %d (expected %d): %m\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret, errno, EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) arg.flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* A part of the buffer is read-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) addr_ro - sizeof(siginfo_t) * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (ret != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) err("sys_ptrace() returns %d (expected 2): %m\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* Read-only buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_ro);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (ret != -1 && errno != EFAULT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) err("sys_ptrace() returns %d (expected -1),"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) " errno %d (expected %d): %m\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ret, errno, EFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) exit_code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) munmap(addr_rw, 2 * PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return exit_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int check_direct_path(pid_t child, int shared, int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct ptrace_peeksiginfo_args arg = {.flags = 0, .nr = nr, .off = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int i, j, ret, exit_code = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) siginfo_t siginfo[SIGNR];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int si_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (shared == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) arg.flags = PTRACE_PEEKSIGINFO_SHARED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) si_code = TEST_SICODE_SHARE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) arg.flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) si_code = TEST_SICODE_PRIV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) for (i = 0; i < SIGNR; ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) arg.off = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, siginfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (ret == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) err("ptrace() failed: %m\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) for (j = 0; j < ret; j++, i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (siginfo[j].si_code == si_code &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) siginfo[j].si_int == i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) err("%d: Wrong siginfo i=%d si_code=%d si_int=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) shared, i, siginfo[j].si_code, siginfo[j].si_int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (i != SIGNR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) err("Only %d signals were read\n", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) exit_code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return exit_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int main(int argc, char *argv[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) siginfo_t siginfo[SIGNR];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int i, exit_code = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) sigset_t blockmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) pid_t child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) sigemptyset(&blockmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) sigaddset(&blockmask, SIGRTMIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) sigprocmask(SIG_BLOCK, &blockmask, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) child = fork();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (child == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) err("fork() failed: %m");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) } else if (child == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) pid_t ppid = getppid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (ppid != getppid())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) sleep(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* Send signals in process-wide and per-thread queues */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) for (i = 0; i < SIGNR; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) siginfo->si_code = TEST_SICODE_SHARE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) siginfo->si_int = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) sys_rt_sigqueueinfo(child, SIGRTMIN, siginfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) siginfo->si_code = TEST_SICODE_PRIV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) siginfo->si_int = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) sys_rt_tgsigqueueinfo(child, child, SIGRTMIN, siginfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (sys_ptrace(PTRACE_ATTACH, child, NULL, NULL) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) waitpid(child, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Dump signals one by one*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (check_direct_path(child, 0, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /* Dump all signals for one call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (check_direct_path(child, 0, SIGNR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * Dump signal from the process-wide queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * The number of signals is not multible to the buffer size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (check_direct_path(child, 1, 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (check_error_paths(child))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) printf("PASS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) exit_code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (sys_ptrace(PTRACE_KILL, child, NULL, NULL) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) waitpid(child, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return exit_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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