From: kernel test robot <lkp@intel.com>
To: Dave Penkler <dpenkler@gmail.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: drivers/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c:1817:7-14: WARNING opportunity for memdup_user
Date: Sat, 11 Jul 2026 17:50:00 +0800 [thread overview]
Message-ID: <202607111740.UNpfLXaQ-lkp@intel.com> (raw)
Hi Dave,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: dd3210c47e8d3ac6b4e9141fc68acc03b38c0ba3
commit: e6ab504633e4c06e35377ecf3c8cbc304de79858 staging: gpib: Destage gpib
date: 8 months ago
config: hexagon-randconfig-r051-20260709 (https://download.01.org/0day-ci/archive/20260711/202607111740.UNpfLXaQ-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c279890c85da307abe34f10333442bbf72a60644)
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
| Fixes: e6ab504633e4 ("staging: gpib: Destage gpib")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607111740.UNpfLXaQ-lkp@intel.com/
cocci warnings: (new ones prefixed by >>)
>> drivers/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c:1817:7-14: WARNING opportunity for memdup_user
vim +1817 drivers/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1803
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1804 /*
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1805 * user space access to write function
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1806 */
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1807
8e7ff4e7a2358f drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2025-01-14 1808 static ssize_t skel_write(struct file *file, const char __user *user_buffer,
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1809 size_t count, loff_t *ppos)
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1810 {
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1811 struct usb_skel *dev;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1812 char *buf;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1813 ssize_t rv;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1814
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1815 dev = file->private_data;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1816
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 @1817 buf = kmalloc(count, GFP_KERNEL);
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1818 if (!buf)
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1819 return -ENOMEM;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1820
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1821 if (copy_from_user(buf, user_buffer, count)) {
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1822 kfree(buf);
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1823 return -EFAULT;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1824 }
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1825
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1826 rv = skel_do_write(dev, buf, count);
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1827 kfree(buf);
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1828 return rv;
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1829 }
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1830 #endif
fce79512a96afa drivers/staging/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c Dave Penkler 2024-09-18 1831
:::::: The code at line 1817 was first introduced by commit
:::::: fce79512a96afacbe297ba3c5c2f7ed34944540d staging: gpib: Add LPVO DIY USB GPIB driver
:::::: TO: Dave Penkler <dpenkler@gmail.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-07-11 9:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-11 9:50 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-03-23 23:36 drivers/gpib/lpvo_usb_gpib/lpvo_usb_gpib.c:1817:7-14: WARNING opportunity for memdup_user kernel test robot
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