// https://syzkaller.appspot.com/bug?id=d767177245c54af614d5241159cce56995eef0db // 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[42]; void test() { memset(r, -1, sizeof(r)); r[0] = syscall(__NR_mmap, 0x20000000ul, 0xf7d000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); r[1] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul); *(uint16_t*)0x20590fa8 = (uint16_t)0x26; memcpy((void*)0x20590faa, "\x73\x6b\x63\x69\x70\x68\x65\x72\x00\x00\x00\x00\x00\x00", 14); *(uint32_t*)0x20590fb8 = (uint32_t)0x0; *(uint32_t*)0x20590fbc = (uint32_t)0x0; memcpy((void*)0x20590fc0, "\x63\x68\x61\x63\x68\x61\x32\x30\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" "\x00\x00\x00\x00", 64); r[7] = syscall(__NR_bind, r[1], 0x20590fa8ul, 0x58ul); memcpy((void*)0x201ec000, "\x0a\x07\x75\xb0\xd5\xe3\x83\xe5\xb3\xb6" "\x0c\xed\x5c\x54\xdb\xb7\x29\x5d\xf0\xdf" "\x82\x17\xad\x40\x00\x00\x00\x00\x00\x00" "\x00\xe6", 32); r[9] = syscall(__NR_setsockopt, r[1], 0x117ul, 0x1ul, 0x201ec000ul, 0x20ul); r[10] = syscall(__NR_accept, r[1], 0x0ul, 0x0ul); r[11] = syscall(__NR_io_setup, 0x5ul, 0x20479000ul); if (r[11] != -1) r[12] = *(uint64_t*)0x20479000; r[13] = syscall(__NR_eventfd, 0x988ul); *(uint64_t*)0x20738000 = (uint64_t)0x20f73fc0; *(uint64_t*)0x20738008 = (uint64_t)0x208e8fc0; *(uint64_t*)0x20f73fc0 = (uint64_t)0x0; *(uint32_t*)0x20f73fc8 = (uint32_t)0x0; *(uint32_t*)0x20f73fcc = (uint32_t)0x0; *(uint16_t*)0x20f73fd0 = (uint16_t)0x0; *(uint16_t*)0x20f73fd2 = (uint16_t)0xdccf; *(uint32_t*)0x20f73fd4 = r[10]; *(uint64_t*)0x20f73fd8 = (uint64_t)0x2079a000; *(uint64_t*)0x20f73fe0 = (uint64_t)0x19; *(uint64_t*)0x20f73fe8 = (uint64_t)0x0; *(uint64_t*)0x20f73ff0 = (uint64_t)0x0; *(uint32_t*)0x20f73ff8 = (uint32_t)0x1; *(uint32_t*)0x20f73ffc = r[13]; memcpy((void*)0x2079a000, "\x16\x80\xb5\x6c\x88\xe4\x52\xf0\xc9\x0a" "\xfe\xde\x60\x61\xa2\x0a\x17\x1f\xd8\x6d" "\x1c\x7b\xb9\xe1\xc5", 25); *(uint64_t*)0x208e8fc0 = (uint64_t)0x0; *(uint32_t*)0x208e8fc8 = (uint32_t)0x0; *(uint32_t*)0x208e8fcc = (uint32_t)0x0; *(uint16_t*)0x208e8fd0 = (uint16_t)0x8; *(uint16_t*)0x208e8fd2 = (uint16_t)0x200000000000001; *(uint32_t*)0x208e8fd4 = r[10]; *(uint64_t*)0x208e8fd8 = (uint64_t)0x20435035; *(uint64_t*)0x208e8fe0 = (uint64_t)0x0; *(uint64_t*)0x208e8fe8 = (uint64_t)0x100000000; *(uint64_t*)0x208e8ff0 = (uint64_t)0x0; *(uint32_t*)0x208e8ff8 = (uint32_t)0x1; *(uint32_t*)0x208e8ffc = (uint32_t)0xffffffffffffffff; r[41] = syscall(__NR_io_submit, r[12], 0x2ul, 0x20738000ul); } int main() { int i; for (i = 0; i < 8; i++) { if (fork() == 0) { loop(); return 0; } } sleep(1000000); return 0; }