// https://syzkaller.appspot.com/bug?id=2bf7e8a31b3d0f4a606a861ed1e76926d628617f // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static long syz_open_procfs(long a0, long a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == -1) { snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); } else { snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); } int fd = open(buf, O_RDWR); if (fd == -1) fd = open(buf, O_RDONLY); return fd; } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); long res = 0; memcpy((void*)0x20000100, "personality\x00", 12); res = syz_open_procfs(0, 0x20000100); if (res != -1) r[0] = res; syscall(__NR_sendfile, r[0], r[0], 0, 3); res = syscall(__NR_pipe2, 0x200000c0, 0); if (res != -1) r[1] = *(uint32_t*)0x200000c4; memcpy((void*)0x20000100, "/proc/self/net/pfkey\x00", 21); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0, 0); if (res != -1) r[2] = res; syscall(__NR_splice, r[2], 0, r[1], 0, 2, 0); memcpy((void*)0x20f80000, "./file0\x00", 8); syscall(__NR_mknod, 0x20f80000, 0x1040, 0); memcpy((void*)0x20000340, "./file0\x00", 8); syscall(__NR_execve, 0x20000340, 0, 0); return 0; }