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Message-ID: <202511020147.47PufBIR-lkp@intel.com>
Date: Sun, 2 Nov 2025 01:49:19 +0800
From: kernel test robot <lkp@...el.com>
To: Mateusz Guzik <mjguzik@...il.com>, torvalds@...ux-foundation.org
Cc: oe-kbuild-all@...ts.linux.dev, brauner@...nel.org,
	viro@...iv.linux.org.uk, jack@...e.cz, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, tglx@...utronix.de, pfalcato@...e.de,
	Mateusz Guzik <mjguzik@...il.com>
Subject: Re: [PATCH 3/3] fs: hide names_cachep behind runtime access machinery

Hi Mateusz,

kernel test robot noticed the following build warnings:

[auto build test WARNING on arnd-asm-generic/master]
[also build test WARNING on linus/master brauner-vfs/vfs.all v6.18-rc3 next-20251031]
[cannot apply to linux/master]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Mateusz-Guzik/x86-fix-access_ok-and-valid_user_address-using-wrong-USER_PTR_MAX-in-modules/20251101-054539
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link:    https://lore.kernel.org/r/20251031174220.43458-4-mjguzik%40gmail.com
patch subject: [PATCH 3/3] fs: hide names_cachep behind runtime access machinery
config: i386-randconfig-061-20251101 (https://download.01.org/0day-ci/archive/20251102/202511020147.47PufBIR-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251102/202511020147.47PufBIR-lkp@intel.com/reproduce)

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/202511020147.47PufBIR-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   fs/smb/client/link.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/dir.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/misc.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/cifsfs.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/ioctl.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/inode.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/file.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/readdir.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/namespace.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
--
   fs/smb/client/smb2ops.c: note: in included file:
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
>> fs/smb/client/cifsproto.h:71:16: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)
   fs/smb/client/cifsproto.h:77:17: sparse: sparse: cast truncates bits from constant value (123456789abcdef becomes 89abcdef)

vim +71 fs/smb/client/cifsproto.h

b6b38f704a8193 fs/cifs/cifsproto.h Joe Perches        2010-04-21  48  
6d5786a34d98bf fs/cifs/cifsproto.h Pavel Shilovsky    2012-06-20  49  #define free_xid(curr_xid)						\
b6b38f704a8193 fs/cifs/cifsproto.h Joe Perches        2010-04-21  50  do {									\
6d5786a34d98bf fs/cifs/cifsproto.h Pavel Shilovsky    2012-06-20  51  	_free_xid(curr_xid);						\
a0a3036b81f1f6 fs/cifs/cifsproto.h Joe Perches        2020-04-14  52  	cifs_dbg(FYI, "VFS: leaving %s (xid = %u) rc = %d\n",		\
b6b38f704a8193 fs/cifs/cifsproto.h Joe Perches        2010-04-21  53  		 __func__, curr_xid, (int)rc);				\
d683bcd3e5d157 fs/cifs/cifsproto.h Steve French       2018-05-19  54  	if (rc)								\
d683bcd3e5d157 fs/cifs/cifsproto.h Steve French       2018-05-19  55  		trace_smb3_exit_err(curr_xid, __func__, (int)rc);	\
d683bcd3e5d157 fs/cifs/cifsproto.h Steve French       2018-05-19  56  	else								\
d683bcd3e5d157 fs/cifs/cifsproto.h Steve French       2018-05-19  57  		trace_smb3_exit_done(curr_xid, __func__);		\
b6b38f704a8193 fs/cifs/cifsproto.h Joe Perches        2010-04-21  58  } while (0)
4d79dba0e00749 fs/cifs/cifsproto.h Shirish Pargaonkar 2011-04-27  59  extern int init_cifs_idmap(void);
4d79dba0e00749 fs/cifs/cifsproto.h Shirish Pargaonkar 2011-04-27  60  extern void exit_cifs_idmap(void);
b74cb9a80268be fs/cifs/cifsproto.h Sachin Prabhu      2016-05-17  61  extern int init_cifs_spnego(void);
b74cb9a80268be fs/cifs/cifsproto.h Sachin Prabhu      2016-05-17  62  extern void exit_cifs_spnego(void);
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  63  extern const char *build_path_from_dentry(struct dentry *, void *);
7ad54b98fc1f14 fs/cifs/cifsproto.h Paulo Alcantara    2022-12-18  64  char *__build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
7ad54b98fc1f14 fs/cifs/cifsproto.h Paulo Alcantara    2022-12-18  65  					       const char *tree, int tree_len,
7ad54b98fc1f14 fs/cifs/cifsproto.h Paulo Alcantara    2022-12-18  66  					       bool prefix);
268a635d414df4 fs/cifs/cifsproto.h Aurelien Aptel     2017-02-13  67  extern char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  68  						    void *page, bool prefix);
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  69  static inline void *alloc_dentry_path(void)
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  70  {
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05 @71  	return __getname();
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  72  }
f6a9bc336b600e fs/cifs/cifsproto.h Al Viro            2021-03-05  73  

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

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