// https://syzkaller.appspot.com/bug?id=483576ccee65fe1983c87f6518df79939853ca5f // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); if (pthread_create(&th, &attr, fn, arg)) exit(1); pthread_attr_destroy(&attr); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); int i; for (i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } #define SYZ_HAVE_SETUP_TEST 1 static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); } #define SYZ_HAVE_RESET_TEST 1 static void reset_test() { int fd; for (fd = 3; fd < 30; fd++) close(fd); } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; int collide = 0; again: for (call = 0; call < 6; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (collide && (call % 2) == 0) break; event_timedwait(&th->done, 45); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); if (!collide) { collide = 1; goto again; } } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter; for (iter = 0;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); reset_test(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5 * 1000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { long res; switch (call) { case 0: res = syscall(__NR_socket, 0xa, 3, 0x3c); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000300 = 0xa; *(uint16_t*)0x20000302 = htobe16(0); *(uint32_t*)0x20000304 = 0; *(uint64_t*)0x20000308 = htobe64(0); *(uint64_t*)0x20000310 = htobe64(1); *(uint32_t*)0x20000318 = 0; syscall(__NR_connect, r[0], 0x20000300, 0x1c); break; case 2: *(uint64_t*)0x200000c0 = 0; *(uint32_t*)0x200000c8 = 0; *(uint64_t*)0x200000d0 = 0x20000200; *(uint64_t*)0x200000d8 = 0; *(uint64_t*)0x200000e0 = 0x20000140; *(uint64_t*)0x200000e8 = 0; *(uint32_t*)0x200000f0 = 0; syscall(__NR_sendmsg, r[0], 0x200000c0, 0xc100); break; case 3: *(uint64_t*)0x20000380 = 0; *(uint32_t*)0x20000388 = 0; *(uint64_t*)0x20000390 = 0x20000240; *(uint64_t*)0x20000240 = 0x20000140; memcpy((void*)0x20000140, "\xb1\x0b\x93\x86", 4); *(uint64_t*)0x20000248 = 4; *(uint64_t*)0x20000398 = 1; *(uint64_t*)0x200003a0 = 0x20000200; *(uint64_t*)0x200003a8 = 0; *(uint32_t*)0x200003b0 = 0; syscall(__NR_sendmsg, r[0], 0x20000380, 0); break; case 4: *(uint32_t*)0x20000280 = 0xe2e; syscall(__NR_setsockopt, r[0], 0x29, 0x4a, 0x20000280, 4); break; case 5: *(uint64_t*)0x20006780 = 0x20000000; *(uint32_t*)0x20006788 = 0x80; *(uint64_t*)0x20006790 = 0x20000080; *(uint64_t*)0x20000080 = 0x200006c0; *(uint64_t*)0x20000088 = 0x1000; *(uint64_t*)0x20000090 = 0x20000180; *(uint64_t*)0x20000098 = 0xb3; *(uint64_t*)0x20006798 = 2; *(uint64_t*)0x200067a0 = 0x200003c0; *(uint64_t*)0x200067a8 = 0x47; *(uint32_t*)0x200067b0 = 8; *(uint32_t*)0x200067b8 = 0x4f82; *(uint64_t*)0x200067c0 = 0x20000500; *(uint32_t*)0x200067c8 = 0x80; *(uint64_t*)0x200067d0 = 0x20001940; *(uint64_t*)0x20001940 = 0x200016c0; *(uint64_t*)0x20001948 = 0xfe; *(uint64_t*)0x20001950 = 0x20000580; *(uint64_t*)0x20001958 = 0x57; *(uint64_t*)0x20001960 = 0x200017c0; *(uint64_t*)0x20001968 = 0xfd; *(uint64_t*)0x20001970 = 0x200018c0; *(uint64_t*)0x20001978 = 0x7f; *(uint64_t*)0x20001980 = 0x20000100; *(uint64_t*)0x20001988 = 0x3d; *(uint64_t*)0x200067d8 = 5; *(uint64_t*)0x200067e0 = 0x200019c0; *(uint64_t*)0x200067e8 = 0xc6; *(uint32_t*)0x200067f0 = 2; *(uint32_t*)0x200067f8 = 0x7f; *(uint64_t*)0x20006800 = 0x20001ac0; *(uint32_t*)0x20006808 = 0x80; *(uint64_t*)0x20006810 = 0x20001d80; *(uint64_t*)0x20001d80 = 0x20001b40; *(uint64_t*)0x20001d88 = 0x69; *(uint64_t*)0x20001d90 = 0x20001bc0; *(uint64_t*)0x20001d98 = 0x88; *(uint64_t*)0x20001da0 = 0x20001c80; *(uint64_t*)0x20001da8 = 0x5c; *(uint64_t*)0x20001db0 = 0x200002c0; *(uint64_t*)0x20001db8 = 0x39; *(uint64_t*)0x20001dc0 = 0x20001d00; *(uint64_t*)0x20001dc8 = 0x74; *(uint64_t*)0x20001dd0 = 0x20000340; *(uint64_t*)0x20001dd8 = 0x27; *(uint64_t*)0x20001de0 = 0x20000440; *(uint64_t*)0x20001de8 = 0xf; *(uint64_t*)0x20006818 = 7; *(uint64_t*)0x20006820 = 0x20001e00; *(uint64_t*)0x20006828 = 0xc0; *(uint32_t*)0x20006830 = 0x80000001; *(uint32_t*)0x20006838 = 2; *(uint64_t*)0x20006840 = 0x20001ec0; *(uint32_t*)0x20006848 = 0x80; *(uint64_t*)0x20006850 = 0x200031c0; *(uint64_t*)0x200031c0 = 0x20000600; *(uint64_t*)0x200031c8 = 9; *(uint64_t*)0x200031d0 = 0x20001f40; *(uint64_t*)0x200031d8 = 0x8b; *(uint64_t*)0x200031e0 = 0x20002000; *(uint64_t*)0x200031e8 = 0x65; *(uint64_t*)0x200031f0 = 0x20002080; *(uint64_t*)0x200031f8 = 0x8e; *(uint64_t*)0x20003200 = 0x20002140; *(uint64_t*)0x20003208 = 0x5a; *(uint64_t*)0x20003210 = 0x200021c0; *(uint64_t*)0x20003218 = 0x1000; *(uint64_t*)0x20006858 = 6; *(uint64_t*)0x20006860 = 0x20003240; *(uint64_t*)0x20006868 = 0x24; *(uint32_t*)0x20006870 = 0x7fff; *(uint32_t*)0x20006878 = 1; *(uint64_t*)0x20006880 = 0x20003280; *(uint32_t*)0x20006888 = 0x80; *(uint64_t*)0x20006890 = 0x200033c0; *(uint64_t*)0x200033c0 = 0x20003300; *(uint64_t*)0x200033c8 = 0x94; *(uint64_t*)0x20006898 = 1; *(uint64_t*)0x200068a0 = 0x20003400; *(uint64_t*)0x200068a8 = 0x1000; *(uint32_t*)0x200068b0 = 0x200; *(uint32_t*)0x200068b8 = 0; *(uint64_t*)0x200068c0 = 0; *(uint32_t*)0x200068c8 = 0; *(uint64_t*)0x200068d0 = 0x20005700; *(uint64_t*)0x20005700 = 0x20004400; *(uint64_t*)0x20005708 = 8; *(uint64_t*)0x20005710 = 0x20004440; *(uint64_t*)0x20005718 = 0x1000; *(uint64_t*)0x20005720 = 0x20005440; *(uint64_t*)0x20005728 = 0x10; *(uint64_t*)0x20005730 = 0x20005480; *(uint64_t*)0x20005738 = 0x6f; *(uint64_t*)0x20005740 = 0x20005500; *(uint64_t*)0x20005748 = 0x8e; *(uint64_t*)0x20005750 = 0x200055c0; *(uint64_t*)0x20005758 = 0x31; *(uint64_t*)0x20005760 = 0x20005600; *(uint64_t*)0x20005768 = 0xe4; *(uint64_t*)0x200068d8 = 7; *(uint64_t*)0x200068e0 = 0x20005780; *(uint64_t*)0x200068e8 = 0x1000; *(uint32_t*)0x200068f0 = 1; *(uint32_t*)0x200068f8 = 1; *(uint64_t*)0x20006900 = 0; *(uint64_t*)0x20006908 = 0; syscall(__NR_recvmmsg, r[0], 0x20006780, 6, 2, 0x20006900); break; } } int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }