[xilinx-xlnx:lkp_test 64/504] drivers/uio/uio_dmabuf.c:163:5-13: ERROR: invalid reference to the index variable of the iterator on line 158

[kernel test robot <lkp@intel.com>]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: git@amd.com
TO: Hyun Kwon <hyun.kwon@xilinx.com>
CC: Michal Simek <monstr@monstr.eu>

tree:   https://github.com/Xilinx/linux-xlnx lkp_test
head:   9ac6b4acf9144465ac1408d4d799635dec0223a0
commit: 172f9f2dc4ebdce5fcf324e2718316b84c040621 [64/504] uio: Add dma-buf import ioctls
:::::: branch date: 27 hours ago
:::::: commit date: 4 days ago
config: microblaze-randconfig-r054-20250111 (https://download.01.org/0day-ci/archive/20250111/202501111908.L8JbKBdE-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 14.2.0

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>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202501111908.L8JbKBdE-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> drivers/uio/uio_dmabuf.c:163:5-13: ERROR: invalid reference to the index variable of the iterator on line 158

vim +163 drivers/uio/uio_dmabuf.c

172f9f2dc4ebdc Hyun Kwon 2019-03-04  143  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  144  long uio_dmabuf_unmap(struct uio_device *dev, struct list_head *dbufs,
172f9f2dc4ebdc Hyun Kwon 2019-03-04  145  		      struct mutex *dbufs_lock, void __user *user_args)
172f9f2dc4ebdc Hyun Kwon 2019-03-04  146  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  147  {
172f9f2dc4ebdc Hyun Kwon 2019-03-04  148  	struct uio_dmabuf_args args;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  149  	struct uio_dmabuf_mem *dbuf_mem;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  150  	long ret;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  151  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  152  	if (copy_from_user(&args, user_args, sizeof(args))) {
172f9f2dc4ebdc Hyun Kwon 2019-03-04  153  		ret = -EFAULT;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  154  		goto err;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  155  	}
172f9f2dc4ebdc Hyun Kwon 2019-03-04  156  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  157  	mutex_lock(dbufs_lock);
172f9f2dc4ebdc Hyun Kwon 2019-03-04 @158  	list_for_each_entry(dbuf_mem, dbufs, list) {
172f9f2dc4ebdc Hyun Kwon 2019-03-04  159  		if (dbuf_mem->dbuf_fd == args.dbuf_fd)
172f9f2dc4ebdc Hyun Kwon 2019-03-04  160  			break;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  161  	}
172f9f2dc4ebdc Hyun Kwon 2019-03-04  162  
172f9f2dc4ebdc Hyun Kwon 2019-03-04 @163  	if (dbuf_mem->dbuf_fd != args.dbuf_fd) {
172f9f2dc4ebdc Hyun Kwon 2019-03-04  164  		dev_err(dev->dev.parent, "failed to find the dmabuf (%d)\n",
172f9f2dc4ebdc Hyun Kwon 2019-03-04  165  			args.dbuf_fd);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  166  		ret = -EINVAL;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  167  		goto err_unlock;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  168  	}
172f9f2dc4ebdc Hyun Kwon 2019-03-04  169  	list_del(&dbuf_mem->list);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  170  	mutex_unlock(dbufs_lock);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  171  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  172  	dma_buf_unmap_attachment(dbuf_mem->dbuf_attach, dbuf_mem->sgt,
172f9f2dc4ebdc Hyun Kwon 2019-03-04  173  				 dbuf_mem->dir);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  174  	dma_buf_detach(dbuf_mem->dbuf, dbuf_mem->dbuf_attach);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  175  	dma_buf_put(dbuf_mem->dbuf);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  176  	kfree(dbuf_mem);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  177  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  178  	memset(&args, 0x0, sizeof(args));
172f9f2dc4ebdc Hyun Kwon 2019-03-04  179  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  180  	if (copy_to_user(user_args, &args, sizeof(args))) {
172f9f2dc4ebdc Hyun Kwon 2019-03-04  181  		ret = -EFAULT;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  182  		goto err;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  183  	}
172f9f2dc4ebdc Hyun Kwon 2019-03-04  184  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  185  	return 0;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  186  
172f9f2dc4ebdc Hyun Kwon 2019-03-04  187  err_unlock:
172f9f2dc4ebdc Hyun Kwon 2019-03-04  188  	mutex_unlock(dbufs_lock);
172f9f2dc4ebdc Hyun Kwon 2019-03-04  189  err:
172f9f2dc4ebdc Hyun Kwon 2019-03-04  190  	return ret;
172f9f2dc4ebdc Hyun Kwon 2019-03-04  191  }
172f9f2dc4ebdc Hyun Kwon 2019-03-04  192  

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