linux-kernel - fs/xfs/libxfs/xfs_dir2.c:336:15-22: WARNING opportunity for kmemdup

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Message-ID: <202412260425.O3CDUhIi-lkp@intel.com>
Date: Thu, 26 Dec 2024 04:21:29 +0800
From: kernel test robot <lkp@...el.com>
To: Dave Chinner <dchinner@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Chandan Babu R <chandanbabu@...nel.org>,
	"Darrick J. Wong" <djwong@...nel.org>
Subject: fs/xfs/libxfs/xfs_dir2.c:336:15-22: WARNING opportunity for kmemdup

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9b2ffa6148b1e4468d08f7e0e7e371c43cac9ffe
commit: f078d4ea827607867d42fb3b2ef907caf86ce49d xfs: convert kmem_alloc() to kmalloc()
date:   11 months ago
config: hexagon-randconfig-r064-20241225 (https://download.01.org/0day-ci/archive/20241226/202412260425.O3CDUhIi-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 9daf10ff8f29ba3a88a105aaa9d2379c21b77d35)

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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412260425.O3CDUhIi-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> fs/xfs/libxfs/xfs_dir2.c:336:15-22: WARNING opportunity for kmemdup

vim +336 fs/xfs/libxfs/xfs_dir2.c

   319	
   320	/*
   321	 * If doing a CI lookup and case-insensitive match, dup actual name into
   322	 * args.value. Return EEXIST for success (ie. name found) or an error.
   323	 */
   324	int
   325	xfs_dir_cilookup_result(
   326		struct xfs_da_args *args,
   327		const unsigned char *name,
   328		int		len)
   329	{
   330		if (args->cmpresult == XFS_CMP_DIFFERENT)
   331			return -ENOENT;
   332		if (args->cmpresult != XFS_CMP_CASE ||
   333						!(args->op_flags & XFS_DA_OP_CILOOKUP))
   334			return -EEXIST;
   335	
 > 336		args->value = kmalloc(len, GFP_NOFS | __GFP_RETRY_MAYFAIL);
   337		if (!args->value)
   338			return -ENOMEM;
   339	
   340		memcpy(args->value, name, len);
   341		args->valuelen = len;
   342		return -EEXIST;
   343	}
   344	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki