fs/smb/client/ioctl.c:135:2-7: WARNING: NULL check before some freeing functions is not needed.

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3eb40771c00a8488fa6ed2cc1fe203477908bf38
commit: 5693347de107a26f68d1f43b25ff2e348c7229a9 smb/client: use writable handle for FS_IOC_SETFLAGS compression
date:   9 weeks ago
config: powerpc-randconfig-r053-20260812 (https://download.01.org/0day-ci/archive/20260816/202608160402.0ffQDoCg-lkp@xxxxxxxxx/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 12df34b8469b8095359de8c249cb1b2753fadeea)

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: 5693347de107 ("smb/client: use writable handle for FS_IOC_SETFLAGS compression")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608160402.0ffQDoCg-lkp@xxxxxxxxx/

cocci warnings: (new ones prefixed by >>)
>> fs/smb/client/ioctl.c:135:2-7: WARNING: NULL check before some freeing functions is not needed.

vim +135 fs/smb/client/ioctl.c

    69	
    70	static int cifs_set_compression_by_path(unsigned int xid, struct file *filep,
    71						struct cifs_tcon *tcon)
    72	{
    73		struct inode *inode = file_inode(filep);
    74		struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
    75		struct TCP_Server_Info *server = tcon->ses->server;
    76		struct cifs_open_parms oparms;
    77		struct cifs_open_info_data data = {};
    78		struct cifsFileInfo *tmp_cfile = NULL;
    79		struct cifs_fid fid = {};
    80		const char *full_path;
    81		__u32 oplock = 0;
    82		u64 uniqueid;
    83		void *page;
    84		int rc;
    85	
    86		if (!server->ops->open || !server->ops->close ||
    87		    !server->ops->query_file_info)
    88			return -EOPNOTSUPP;
    89	
    90		if (!(cifs_sb_flags(cifs_sb) & CIFS_MOUNT_SERVER_INUM) ||
    91		    cifs_sb->mnt_cifs_serverino_autodisabled)
    92			return -EOPNOTSUPP;
    93	
    94		if (d_unhashed(filep->f_path.dentry))
    95			return -ESTALE;
    96	
    97		page = alloc_dentry_path();
    98		full_path = build_path_from_dentry(filep->f_path.dentry, page);
    99		if (IS_ERR(full_path)) {
   100			free_dentry_path(page);
   101			return PTR_ERR(full_path);
   102		}
   103	
   104		oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA |
   105				     FILE_READ_ATTRIBUTES,
   106				     FILE_OPEN, 0, ACL_NO_MODE);
   107		oparms.fid = &fid;
   108	
   109		rc = server->ops->open(xid, &oparms, &oplock, NULL);
   110		if (rc)
   111			goto out;
   112	
   113		tmp_cfile = kzalloc_obj(*tmp_cfile);
   114		if (!tmp_cfile) {
   115			rc = -ENOMEM;
   116			goto close;
   117		}
   118	
   119		tmp_cfile->fid = fid;
   120		rc = server->ops->query_file_info(xid, tcon, tmp_cfile, &data);
   121		if (rc)
   122			goto close;
   123	
   124		uniqueid = le64_to_cpu(data.fi.IndexNumber);
   125		if (uniqueid != CIFS_I(inode)->uniqueid) {
   126			rc = -ESTALE;
   127			goto close;
   128		}
   129	
   130		rc = server->ops->set_compression(xid, tcon, tmp_cfile);
   131	
   132	close:
   133		server->ops->close(xid, tcon, &fid);
   134		if (tmp_cfile)
 > 135			kfree(tmp_cfile);
   136		cifs_free_open_info(&data);
   137	out:
   138		free_dentry_path(page);
   139		return rc;
   140	}
   141	

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