Hi Nitesh, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on next-20220208] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Nitesh-Shetty/block-make-bio_map_kern-non-static/20220207-231407 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: i386-randconfig-c001 (https://download.01.org/0day-ci/archive/20220209/202202091048.qDQvi6ab-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> cocci warnings: (new ones prefixed by >>) >> block/ioctl.c:145:10-17: WARNING opportunity for memdup_user vim +145 block/ioctl.c 126 127 static int blk_ioctl_copy(struct block_device *bdev, fmode_t mode, 128 unsigned long arg) 129 { 130 struct copy_range crange, *ranges; 131 size_t payload_size = 0; 132 int ret; 133 134 if (!(mode & FMODE_WRITE)) 135 return -EBADF; 136 137 if (copy_from_user(&crange, (void __user *)arg, sizeof(crange))) 138 return -EFAULT; 139 140 if (unlikely(!crange.nr_range || crange.reserved || crange.nr_range >= MAX_COPY_NR_RANGE)) 141 return -EINVAL; 142 143 payload_size = (crange.nr_range * sizeof(struct range_entry)) + sizeof(crange); 144 > 145 ranges = kmalloc(payload_size, GFP_KERNEL); 146 if (!ranges) 147 return -ENOMEM; 148 149 if (copy_from_user(ranges, (void __user *)arg, payload_size)) { 150 ret = -EFAULT; 151 goto out; 152 } 153 154 ret = blkdev_issue_copy(bdev, ranges->nr_range, ranges->range_list, bdev, GFP_KERNEL, 0); 155 if (copy_to_user((void __user *)arg, ranges, payload_size)) 156 ret = -EFAULT; 157 out: 158 kfree(ranges); 159 return ret; 160 } 161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
