// https://syzkaller.appspot.com/bug?id=406e8923b864c8454494e6a3d61c50dbd962d37c // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } #include #include 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 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 test(); void loop() { int iter; for (iter = 0;; iter++) { int pid = fork(); if (pid < 0) fail("clone failed"); if (pid == 0) { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); 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; } } } } #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_socket #define __NR_socket 359 #endif #ifndef __NR_bind #define __NR_bind 361 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[15]; void* thr(void* arg) { switch ((long)arg) { case 0: r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); break; case 1: r[1] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul); break; case 2: *(uint16_t*)0x20000000 = (uint16_t)0x26; memcpy((void*)0x20000002, "\x68\x61\x73\x68\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14); *(uint32_t*)0x20000010 = (uint32_t)0x20; *(uint32_t*)0x20000014 = (uint32_t)0xffffffffffffffff; memcpy((void*)0x20000018, "\x63\x6d\x61\x63\x28\x64\x65\x73\x33\x5f\x65\x64\x65\x29" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00", 64); r[7] = syscall(__NR_bind, r[1], 0x20000000ul, 0x58ul); break; case 3: r[8] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul); break; case 4: *(uint16_t*)0x20000fa8 = (uint16_t)0x26; memcpy((void*)0x20000faa, "\x61\x65\x61\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14); *(uint32_t*)0x20000fb8 = (uint32_t)0x0; *(uint32_t*)0x20000fbc = (uint32_t)0x0; memcpy((void*)0x20000fc0, "\x61\x75\x74\x68\x65\x6e\x63\x28\x63\x6d\x61\x63\x28\x64" "\x65\x73\x33\x5f\x65\x64\x65\x2d\x61\x73\x6d\x29\x2c\x70" "\x63\x62\x63\x2d\x61\x65\x73\x2d\x61\x65\x73\x6e\x69\x29" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00", 64); r[14] = syscall(__NR_bind, r[8], 0x20000fa8ul, 0x58ul); break; } return 0; } void test() { long i; pthread_t th[10]; memset(r, -1, sizeof(r)); srand(getpid()); for (i = 0; i < 5; i++) { pthread_create(&th[i], 0, thr, (void*)i); usleep(rand() % 10000); } for (i = 0; i < 5; i++) { pthread_create(&th[5 + i], 0, thr, (void*)i); if (rand() % 2) usleep(rand() % 10000); } usleep(rand() % 100000); } int main() { loop(); return 0; }