| // WARNING in xfrm_state_fini |
| // https://syzkaller.appspot.com/bug?id=c922592229951800c197ce48a5eaab8877c33723 |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <dirent.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <sched.h> |
| #include <signal.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdio.h> |
| #include <sys/mount.h> |
| #include <sys/prctl.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/time.h> |
| #include <sys/wait.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| static void exitf(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit(kRetryStatus); |
| } |
| |
| static uint64_t current_time_ms() |
| { |
| struct timespec ts; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| fail("clock_gettime failed"); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void use_temporary_dir() |
| { |
| char tmpdir_template[] = "./syzkaller.XXXXXX"; |
| char* tmpdir = mkdtemp(tmpdir_template); |
| if (!tmpdir) |
| fail("failed to mkdtemp"); |
| if (chmod(tmpdir, 0777)) |
| fail("failed to chmod"); |
| if (chdir(tmpdir)) |
| fail("failed to chdir"); |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = 128 << 20; |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 8 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| |
| #define CLONE_NEWCGROUP 0x02000000 |
| |
| unshare(CLONE_NEWNS); |
| unshare(CLONE_NEWIPC); |
| unshare(CLONE_NEWCGROUP); |
| unshare(CLONE_NEWNET); |
| unshare(CLONE_NEWUTS); |
| unshare(CLONE_SYSVSEM); |
| } |
| |
| static int do_sandbox_none(int executor_pid, bool enable_tun) |
| { |
| unshare(CLONE_NEWPID); |
| int pid = fork(); |
| if (pid < 0) |
| fail("sandbox fork failed"); |
| if (pid) |
| return pid; |
| |
| sandbox_common(); |
| |
| loop(); |
| doexit(1); |
| } |
| |
| static void remove_dir(const char* dir) |
| { |
| DIR* dp; |
| struct dirent* ep; |
| int iter = 0; |
| retry: |
| dp = opendir(dir); |
| if (dp == NULL) { |
| if (errno == EMFILE) { |
| exitf("opendir(%s) failed due to NOFILE, exiting"); |
| } |
| exitf("opendir(%s) failed", dir); |
| } |
| while ((ep = readdir(dp))) { |
| if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) |
| continue; |
| char filename[FILENAME_MAX]; |
| snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); |
| struct stat st; |
| if (lstat(filename, &st)) |
| exitf("lstat(%s) failed", filename); |
| if (S_ISDIR(st.st_mode)) { |
| remove_dir(filename); |
| continue; |
| } |
| int i; |
| for (i = 0;; i++) { |
| if (unlink(filename) == 0) |
| break; |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno != EBUSY || i > 100) |
| exitf("unlink(%s) failed", filename); |
| if (umount2(filename, MNT_DETACH)) |
| exitf("umount(%s) failed", filename); |
| } |
| } |
| closedir(dp); |
| int i; |
| for (i = 0;; i++) { |
| if (rmdir(dir) == 0) |
| break; |
| if (i < 100) { |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno == EBUSY) { |
| if (umount2(dir, MNT_DETACH)) |
| exitf("umount(%s) failed", dir); |
| continue; |
| } |
| if (errno == ENOTEMPTY) { |
| if (iter < 100) { |
| iter++; |
| goto retry; |
| } |
| } |
| } |
| exitf("rmdir(%s) failed", dir); |
| } |
| } |
| |
| static void test(); |
| |
| void loop() |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| char cwdbuf[256]; |
| sprintf(cwdbuf, "./%d", iter); |
| if (mkdir(cwdbuf, 0777)) |
| fail("failed to mkdir"); |
| int pid = fork(); |
| if (pid < 0) |
| fail("loop fork failed"); |
| if (pid == 0) { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| if (chdir(cwdbuf)) |
| fail("failed to chdir"); |
| test(); |
| doexit(0); |
| } |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| int res = waitpid(-1, &status, __WALL | WNOHANG); |
| if (res == pid) |
| break; |
| usleep(1000); |
| if (current_time_ms() - start > 5 * 1000) { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| break; |
| } |
| } |
| remove_dir(cwdbuf); |
| } |
| } |
| |
| long r[2]; |
| void test() |
| { |
| memset(r, -1, sizeof(r)); |
| syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, |
| 0xfffffffffffffffful, 0x0ul); |
| r[0] = syscall(__NR_socket, 0x10ul, 0x3ul, 0x6ul); |
| *(uint16_t*)0x204ff000 = (uint16_t)0x10; |
| *(uint16_t*)0x204ff002 = (uint16_t)0x0; |
| *(uint32_t*)0x204ff004 = (uint32_t)0x0; |
| *(uint32_t*)0x204ff008 = (uint32_t)0x5; |
| syscall(__NR_bind, r[0], 0x204ff000ul, 0xcul); |
| r[1] = syscall(__NR_socket, 0x2ul, 0x2ul, 0x0ul); |
| *(uint64_t*)0x20000000 = (uint64_t)0x0; |
| *(uint64_t*)0x20000008 = (uint64_t)0x100000000000000; |
| *(uint8_t*)0x20000010 = (uint8_t)0xac; |
| *(uint8_t*)0x20000011 = (uint8_t)0x14; |
| *(uint8_t*)0x20000012 = (uint8_t)0x0; |
| *(uint8_t*)0x20000013 = (uint8_t)0xbb; |
| *(uint16_t*)0x20000020 = (uint16_t)0x204e; |
| *(uint16_t*)0x20000022 = (uint16_t)0x0; |
| *(uint16_t*)0x20000024 = (uint16_t)0x204e; |
| *(uint16_t*)0x20000026 = (uint16_t)0x0; |
| *(uint16_t*)0x20000028 = (uint16_t)0x2; |
| *(uint8_t*)0x2000002a = (uint8_t)0x0; |
| *(uint8_t*)0x2000002b = (uint8_t)0x0; |
| *(uint8_t*)0x2000002c = (uint8_t)0x0; |
| *(uint32_t*)0x20000030 = (uint32_t)0x0; |
| *(uint32_t*)0x20000034 = (uint32_t)0x0; |
| *(uint64_t*)0x20000038 = (uint64_t)0x0; |
| *(uint64_t*)0x20000040 = (uint64_t)0x0; |
| *(uint64_t*)0x20000048 = (uint64_t)0x0; |
| *(uint64_t*)0x20000050 = (uint64_t)0x0; |
| *(uint64_t*)0x20000058 = (uint64_t)0x0; |
| *(uint64_t*)0x20000060 = (uint64_t)0x0; |
| *(uint64_t*)0x20000068 = (uint64_t)0x0; |
| *(uint64_t*)0x20000070 = (uint64_t)0x0; |
| *(uint64_t*)0x20000078 = (uint64_t)0x0; |
| *(uint64_t*)0x20000080 = (uint64_t)0x0; |
| *(uint64_t*)0x20000088 = (uint64_t)0x0; |
| *(uint64_t*)0x20000090 = (uint64_t)0x0; |
| *(uint32_t*)0x20000098 = (uint32_t)0x0; |
| *(uint32_t*)0x2000009c = (uint32_t)0x0; |
| *(uint8_t*)0x200000a0 = (uint8_t)0x1; |
| *(uint8_t*)0x200000a1 = (uint8_t)0x0; |
| *(uint8_t*)0x200000a2 = (uint8_t)0x0; |
| *(uint8_t*)0x200000a3 = (uint8_t)0x0; |
| *(uint64_t*)0x200000a8 = (uint64_t)0x0; |
| *(uint64_t*)0x200000b0 = (uint64_t)0x100000000000000; |
| *(uint32_t*)0x200000b8 = (uint32_t)0x0; |
| *(uint8_t*)0x200000bc = (uint8_t)0x0; |
| *(uint16_t*)0x200000c0 = (uint16_t)0x0; |
| *(uint8_t*)0x200000c4 = (uint8_t)0xac; |
| *(uint8_t*)0x200000c5 = (uint8_t)0x14; |
| *(uint8_t*)0x200000c6 = (uint8_t)0x0; |
| *(uint8_t*)0x200000c7 = (uint8_t)0xaa; |
| *(uint32_t*)0x200000d4 = (uint32_t)0x0; |
| *(uint8_t*)0x200000d8 = (uint8_t)0x0; |
| *(uint8_t*)0x200000d9 = (uint8_t)0x0; |
| *(uint8_t*)0x200000da = (uint8_t)0xfffffffffffffffd; |
| *(uint32_t*)0x200000dc = (uint32_t)0x0; |
| *(uint32_t*)0x200000e0 = (uint32_t)0x0; |
| *(uint32_t*)0x200000e4 = (uint32_t)0x0; |
| syscall(__NR_setsockopt, r[1], 0x0ul, 0x11ul, 0x20000000ul, 0xe8ul); |
| *(uint16_t*)0x20c24000 = (uint16_t)0x2; |
| *(uint16_t*)0x20c24002 = (uint16_t)0x204e; |
| *(uint32_t*)0x20c24004 = (uint32_t)0x0; |
| *(uint8_t*)0x20c24008 = (uint8_t)0x0; |
| *(uint8_t*)0x20c24009 = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400a = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400b = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400c = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400d = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400e = (uint8_t)0x0; |
| *(uint8_t*)0x20c2400f = (uint8_t)0x0; |
| syscall(__NR_sendto, r[1], 0x20098000ul, 0x0ul, 0x0ul, 0x20c24000ul, |
| 0x10ul); |
| memcpy((void*)0x20632000, "./file0", 8); |
| syscall(__NR_mkdir, 0x20632000ul, 0x16ul); |
| memcpy((void*)0x2000a000, "./file0", 8); |
| memcpy((void*)0x20014ff8, "./file0", 8); |
| memcpy((void*)0x20014000, "proc", 5); |
| syscall(__NR_mount, 0x2000a000ul, 0x20014ff8ul, 0x20014000ul, 0x0ul, |
| 0x20fc9000ul); |
| } |
| |
| int main() |
| { |
| int i; |
| for (i = 0; i < 8; i++) { |
| if (fork() == 0) { |
| use_temporary_dir(); |
| int pid = do_sandbox_none(i, false); |
| int status = 0; |
| while (waitpid(pid, &status, __WALL) != pid) { |
| } |
| return 0; |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |