// https://syzkaller.appspot.com/bug?id=e2dc9aea0465d1eea101bb24cb463e2a7efe7d17 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #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("loop fork 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; } } } } long r[25]; void test() { memset(r, -1, sizeof(r)); r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); r[1] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul); *(uint16_t*)0x20859000 = (uint16_t)0x26; memcpy((void*)0x20859002, "\x61\x65\x61\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14); *(uint32_t*)0x20859010 = (uint32_t)0x0; *(uint32_t*)0x20859014 = (uint32_t)0x0; memcpy((void*)0x20859018, "\x67\x63\x6d\x28\x74\x77\x6f\x66\x69\x73\x68\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\x00\x00", 64); r[7] = syscall(__NR_bind, r[1], 0x20859000ul, 0x58ul); memcpy((void*)0x20e95ff0, "\x64\x9c\x47\xec\xff\xff\xff\x00\x54\x2d" "\xb5\x0f\x41\x9d\x4d\x00", 16); r[9] = syscall(__NR_setsockopt, r[1], 0x117ul, 0x1ul, 0x20e95ff0ul, 0x10ul); r[10] = syscall(__NR_accept, r[1], 0x0ul, 0x0ul); memcpy((void*)0x20f3cf75, "\x35\x95\xc9\x17\xd6\x71\xb6\xb5\x53\x5f\x00\x42\xbd\x83\xa6" "\xd2\x6b\x71\xaa\x9a\x6d\xea\xf4\xce\xde\xed\x63\xf6\xad\x0a" "\x14\xcf\xab\x6e\x65\xf4\xbc\xd7\x40\x82\x9a\x3a\x50\xfa\xc8" "\xec\x4c\x77\xb3\x74\x9b\x24\x4a\xbc\xf0\xb5\xa2\x8c\x60\xf6" "\xd0\x43\x0a\xce\x54\xba\xa4\x15\x6e\xbb\xfa\xa2\xff\xdf\xf4" "\xbb\xa9\x89\xf4\xae\xbc\xcd\x1f\x87\x87\x87\xd9\xfc\x26\xac" "\x60\x20\x14\x40\xff\x95\x83\xcc\x2d\x54\x39\x16\x8d\xd6\x23" "\xe5\xcb\xbe\xc8\x5d\x30\xdb\x1a\xb1\x64\x17\x4f\xe4\x0b\x99" "\x98\x89\xf0\x29\x88\x36\x9b\xe7\x57\x03\x71\x78\xac\x1e\x74" "\x89\x49\x2f\xc2", 139); r[12] = syscall(__NR_write, r[10], 0x20f3cf75ul, 0x8bul); *(uint64_t*)0x20aecfc8 = (uint64_t)0x20f3d000; *(uint32_t*)0x20aecfd0 = (uint32_t)0x10; *(uint64_t*)0x20aecfd8 = (uint64_t)0x20f3d000; *(uint64_t*)0x20aecfe0 = (uint64_t)0x2; *(uint64_t*)0x20aecfe8 = (uint64_t)0x20f3d000; *(uint64_t*)0x20aecff0 = (uint64_t)0x0; *(uint32_t*)0x20aecff8 = (uint32_t)0x100000000; *(uint64_t*)0x20f3d000 = (uint64_t)0x20f3df84; *(uint64_t*)0x20f3d008 = (uint64_t)0x0; *(uint64_t*)0x20f3d010 = (uint64_t)0x20f3dfaf; *(uint64_t*)0x20f3d018 = (uint64_t)0x51; r[24] = syscall(__NR_recvmsg, r[10], 0x20aecfc8ul, 0x10002ul); } int main() { loop(); return 0; }