tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4ca786ae6681b90b0ec3f4c55c89d12f835f8944
commit: 920f4b7e923b35fd9d117fd3cb616b310cd41010 [1304/1443] fs: jfs: fix shift-out-of-bounds in dbAllocAG
config: mips-randconfig-r005-20221017
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=920f4b7e923b35fd9d117fd3cb616b310cd41010
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 920f4b7e923b35fd9d117fd3cb616b310cd41010
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash fs/jfs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> fs/jfs/jfs_dmap.c:196:23: warning: result of comparison of constant 8796093022201 with expression of type 'int' is always false [-Wtautological-constant-out-of-range-compare]
           if (bmp->db_agl2size > MAXMAPSIZE - L2MAXAG) {
               ~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +/int +196 fs/jfs/jfs_dmap.c

   135	
   136	/*
   137	 * NAME:	dbMount()
   138	 *
   139	 * FUNCTION:	initializate the block allocation map.
   140	 *
   141	 *		memory is allocated for the in-core bmap descriptor and
   142	 *		the in-core descriptor is initialized from disk.
   143	 *
   144	 * PARAMETERS:
   145	 *	ipbmap	- pointer to in-core inode for the block map.
   146	 *
   147	 * RETURN VALUES:
   148	 *	0	- success
   149	 *	-ENOMEM	- insufficient memory
   150	 *	-EIO	- i/o error
   151	 *	-EINVAL - wrong bmap data
   152	 */
   153	int dbMount(struct inode *ipbmap)
   154	{
   155		struct bmap *bmp;
   156		struct dbmap_disk *dbmp_le;
   157		struct metapage *mp;
   158		int i, err;
   159	
   160		/*
   161		 * allocate/initialize the in-memory bmap descriptor
   162		 */
   163		/* allocate memory for the in-memory bmap descriptor */
   164		bmp = kmalloc(sizeof(struct bmap), GFP_KERNEL);
   165		if (bmp == NULL)
   166			return -ENOMEM;
   167	
   168		/* read the on-disk bmap descriptor. */
   169		mp = read_metapage(ipbmap,
   170				   BMAPBLKNO << JFS_SBI(ipbmap->i_sb)->l2nbperpage,
   171				   PSIZE, 0);
   172		if (mp == NULL) {
   173			err = -EIO;
   174			goto err_kfree_bmp;
   175		}
   176	
   177		/* copy the on-disk bmap descriptor to its in-memory version. */
   178		dbmp_le = (struct dbmap_disk *) mp->data;
   179		bmp->db_mapsize = le64_to_cpu(dbmp_le->dn_mapsize);
   180		bmp->db_nfree = le64_to_cpu(dbmp_le->dn_nfree);
   181		bmp->db_l2nbperpage = le32_to_cpu(dbmp_le->dn_l2nbperpage);
   182		bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag);
   183		if (!bmp->db_numag) {
   184			err = -EINVAL;
   185			goto err_release_metapage;
   186		}
   187	
   188		bmp->db_maxlevel = le32_to_cpu(dbmp_le->dn_maxlevel);
   189		bmp->db_maxag = le32_to_cpu(dbmp_le->dn_maxag);
   190		bmp->db_agpref = le32_to_cpu(dbmp_le->dn_agpref);
   191		bmp->db_aglevel = le32_to_cpu(dbmp_le->dn_aglevel);
   192		bmp->db_agheight = le32_to_cpu(dbmp_le->dn_agheight);
   193		bmp->db_agwidth = le32_to_cpu(dbmp_le->dn_agwidth);
   194		bmp->db_agstart = le32_to_cpu(dbmp_le->dn_agstart);
   195		bmp->db_agl2size = le32_to_cpu(dbmp_le->dn_agl2size);
 > 196		if (bmp->db_agl2size > MAXMAPSIZE - L2MAXAG) {
   197			err = -EINVAL;
   198			goto err_release_metapage;
   199		}
   200	
   201		for (i = 0; i < MAXAG; i++)
   202			bmp->db_agfree[i] = le64_to_cpu(dbmp_le->dn_agfree[i]);
   203		bmp->db_agsize = le64_to_cpu(dbmp_le->dn_agsize);
   204		bmp->db_maxfreebud = dbmp_le->dn_maxfreebud;
   205	
   206		/* release the buffer. */
   207		release_metapage(mp);
   208	
   209		/* bind the bmap inode and the bmap descriptor to each other. */
   210		bmp->db_ipbmap = ipbmap;
   211		JFS_SBI(ipbmap->i_sb)->bmap = bmp;
   212	
   213		memset(bmp->db_active, 0, sizeof(bmp->db_active));
   214	
   215		/*
   216		 * allocate/initialize the bmap lock
   217		 */
   218		BMAP_LOCK_INIT(bmp);
   219	
   220		return (0);
   221	
   222	err_release_metapage:
   223		release_metapage(mp);
   224	err_kfree_bmp:
   225		kfree(bmp);
   226		return err;
   227	}
   228	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp