linux-kernel - Re: [PATCH] ext4: Add a sanity check for next dentry when insert

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <202410272335.nwupXeQD-lkp@intel.com>
Date: Mon, 28 Oct 2024 00:06:55 +0800
From: kernel test robot <lkp@...el.com>
To: Edward Adam Davis <eadavis@...com>,
	syzbot+0c99c3f90699936c1e77@...kaller.appspotmail.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
	tytso@....edu
Subject: Re: [PATCH] ext4: Add a sanity check for next dentry when insert

Hi Edward,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on linus/master v6.12-rc4 next-20241025]
[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/Edward-Adam-Davis/ext4-Add-a-sanity-check-for-next-dentry-when-insert/20241027-191200
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/tencent_E4CFC65D09852ECE2EF28C83A7C3C6E41206%40qq.com
patch subject: [PATCH] ext4: Add a sanity check for next dentry when insert
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20241027/202410272335.nwupXeQD-lkp@intel.com/config)
compiler: clang version 19.1.2 (https://github.com/llvm/llvm-project 7ba7d8e2f7b6445b60679da826210cdde29eaf8b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241027/202410272335.nwupXeQD-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/202410272335.nwupXeQD-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/ext4/namei.c:29:
   In file included from include/linux/pagemap.h:8:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> fs/ext4/namei.c:2087:5: warning: no previous prototype for function 'ext4_check_next_dentry' [-Wmissing-prototypes]
    2087 | int ext4_check_next_dentry(struct inode *dir,
         |     ^
   fs/ext4/namei.c:2087:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2087 | int ext4_check_next_dentry(struct inode *dir,
         | ^
         | static 
   5 warnings generated.


vim +/ext4_check_next_dentry +2087 fs/ext4/namei.c

  2086	
> 2087	int ext4_check_next_dentry(struct inode *dir,
  2088				struct inode *inode,
  2089				struct ext4_dir_entry_2 *de,
  2090				int buf_size,
  2091				struct ext4_filename *fname)
  2092	{
  2093		int nlen, rlen;
  2094	
  2095		nlen = ext4_dir_rec_len(de->name_len, dir);
  2096		rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
  2097		if (de->inode) {
  2098			struct ext4_dir_entry_2 *nde =
  2099				(struct ext4_dir_entry_2 *)((char *)de + nlen);
  2100			nde->rec_len = ext4_rec_len_to_disk(rlen - nlen, buf_size);
  2101			de->rec_len = ext4_rec_len_to_disk(nlen, buf_size);
  2102			de = nde;
  2103			rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
  2104			return fname_len(fname) > rlen - EXT4_BASE_DIR_LEN;
  2105		}
  2106	
  2107		return 0;
  2108	}
  2109	

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