From: Alice Ryhl <aliceryhl@google.com>
To: kernel test robot <lkp@intel.com>
Cc: "Yury Norov (NVIDIA)" <yury.norov@gmail.com>,
llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [linux-next:master 7315/10599] ld.lld: error: undefined symbol: _copy_from_user
Date: Thu, 20 Nov 2025 15:44:14 +0000 [thread overview]
Message-ID: <aR83TotAs7G-o5Pf@google.com> (raw)
In-Reply-To: <202511202005.7GzetV3D-lkp@intel.com>
On Thu, Nov 20, 2025 at 08:52:07PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b
> commit: d99dc586ca7c7729450af2ed39ca1483c0eb7b5c [7315/10599] uaccess: decouple INLINE_COPY_FROM_USER and CONFIG_RUST
> config: loongarch-randconfig-6002-20251120 (https://download.01.org/0day-ci/archive/20251120/202511202005.7GzetV3D-lkp@intel.com/config)
> compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
> rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251120/202511202005.7GzetV3D-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202511202005.7GzetV3D-lkp@intel.com/
>
> Note: the linux-next/master HEAD 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b builds fine.
> It may have been fixed somewhere.
>
> All errors (new ones prefixed by >>):
>
> >> ld.lld: error: undefined symbol: _copy_from_user
> >>> referenced by uaccess.rs:306 (rust/kernel/uaccess.rs:306)
> >>> samples/rust/rust_misc_device.o:(<kernel::uaccess::UserSliceReader>::read::<i32>) in archive vmlinux.a
> >>> referenced by uaccess.rs:306 (rust/kernel/uaccess.rs:306)
> >>> drivers/android/binder/rust_binder_main.o:(<kernel::uaccess::UserSliceReader>::read::<rust_binder_main::defs::BinderWriteRead>) in archive vmlinux.a
> >>> referenced by uaccess.rs:306 (rust/kernel/uaccess.rs:306)
> >>> drivers/android/binder/rust_binder_main.o:(<kernel::uaccess::UserSliceReader>::read::<rust_binder_main::defs::BinderFreezeInfo>) in archive vmlinux.a
> >>> referenced 24 more times
> --
> >> ld.lld: error: undefined symbol: _copy_to_user
> >>> referenced by uaccess.rs:458 (rust/kernel/uaccess.rs:458)
> >>> samples/rust/rust_misc_device.o:(<kernel::uaccess::UserSliceWriter>::write::<i32>) in archive vmlinux.a
> >>> referenced by uaccess.rs:458 (rust/kernel/uaccess.rs:458)
> >>> samples/rust/rust_misc_device.o:(<rust_misc_device::RustMiscDevice as kernel::miscdevice::MiscDevice>::ioctl) in archive vmlinux.a
> >>> referenced by uaccess.rs:458 (rust/kernel/uaccess.rs:458)
> >>> drivers/android/binder/rust_binder_main.o:(<kernel::uaccess::UserSliceWriter>::write::<rust_binder_main::defs::BinderVersion>) in archive vmlinux.a
> >>> referenced 15 more times
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
This is a known issue:
https://lore.kernel.org/all/20251118173250.2821388-1-aliceryhl@google.com/
prev parent reply other threads:[~2025-11-20 15:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-20 12:52 [linux-next:master 7315/10599] ld.lld: error: undefined symbol: _copy_from_user kernel test robot
2025-11-20 15:44 ` Alice Ryhl [this message]
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