tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.10 head: 43e342905dbc3f8824e43b3a767bddc1976c3fec commit: e45b32960b00947ecb26d7e8c059fee29233c173 [86/183] f2fs: fix compat F2FS_IOC_{MOVE,GARBAGE_COLLECT}_RANGE config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.10 git checkout e45b32960b00947ecb26d7e8c059fee29233c173 # save the attached .config to linux build tree make W=1 W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the sashal-linux-stable/queue-5.10 HEAD 43e342905dbc3f8824e43b3a767bddc1976c3fec builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] fs/f2fs/file.c: In function '__f2fs_ioc_move_range': 2919 | if (copy_to_user((struct f2fs_move_range __user *)arg, | ^~~ fs/f2fs/file.c:2919:52: note: each undeclared identifier is reported only once for each function it appears in Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for MFD_CORE Depends on HAS_IOMEM Selected by - MFD_HI6421_SPMI && STAGING && OF && SPMI vim +/arg +2919 fs/f2fs/file.c 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2888 e45b32960b0094 Chao Yu 2020-11-10 2889 static int __f2fs_ioc_move_range(struct file *filp, e45b32960b0094 Chao Yu 2020-11-10 2890 struct f2fs_move_range *range) 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2891 { 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2892 struct fd dst; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2893 int err; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2894 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2895 if (!(filp->f_mode & FMODE_READ) || 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2896 !(filp->f_mode & FMODE_WRITE)) 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2897 return -EBADF; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2898 e45b32960b0094 Chao Yu 2020-11-10 2899 dst = fdget(range->dst_fd); 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2900 if (!dst.file) 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2901 return -EBADF; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2902 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2903 if (!(dst.file->f_mode & FMODE_WRITE)) { 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2904 err = -EBADF; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2905 goto err_out; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2906 } 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2907 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2908 err = mnt_want_write_file(filp); 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2909 if (err) 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2910 goto err_out; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2911 e45b32960b0094 Chao Yu 2020-11-10 2912 err = f2fs_move_file_range(filp, range->pos_in, dst.file, e45b32960b0094 Chao Yu 2020-11-10 2913 range->pos_out, range->len); 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2914 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2915 mnt_drop_write_file(filp); 3cecfa5f6700c0 Kinglong Mee 2017-03-10 2916 if (err) 3cecfa5f6700c0 Kinglong Mee 2017-03-10 2917 goto err_out; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2918 4dd6f977fc778e Jaegeuk Kim 2016-07-08 @2919 if (copy_to_user((struct f2fs_move_range __user *)arg, 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2920 &range, sizeof(range))) 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2921 err = -EFAULT; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2922 err_out: 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2923 fdput(dst); 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2924 return err; 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2925 } 4dd6f977fc778e Jaegeuk Kim 2016-07-08 2926 :::::: The code at line 2919 was first introduced by commit :::::: 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b f2fs: support an ioctl to move a range of data blocks :::::: TO: Jaegeuk Kim <jaegeuk(a)kernel.org&gt; :::::: CC: Jaegeuk Kim <jaegeuk(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org