fs/sysv/dir.c:106 sysv_readdir() error: uninitialized symbol 'page'.

fs/sysv/dir.c:106 sysv_readdir() error: uninitialized symbol 'page'.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
CC: Al Viro <viro@zeniv.linux.org.uk>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1ec35eadc3b448c91a6b763371a7073444e95f9d
commit: 8dd6c7b2944ce349f06db763d7a2a90a0b83ba0d fs/sysv: Change the signature of dir_get_page()
date:   5 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 5 weeks ago
config: powerpc-randconfig-m031-20230226 (https://download.01.org/0day-ci/archive/20230226/202302261037.EI7SKoxF-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.1.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Link: https://lore.kernel.org/r/202302261037.EI7SKoxF-lkp@intel.com/

New smatch warnings:
fs/sysv/dir.c:106 sysv_readdir() error: uninitialized symbol 'page'.

Old smatch warnings:
fs/sysv/dir.c:110 sysv_readdir() error: uninitialized symbol 'page'.

vim +/page +106 fs/sysv/dir.c

^1da177e4c3f41 Linus Torvalds        2005-04-16   70  
80886298c07234 Al Viro               2013-05-15   71  static int sysv_readdir(struct file *file, struct dir_context *ctx)
^1da177e4c3f41 Linus Torvalds        2005-04-16   72  {
80886298c07234 Al Viro               2013-05-15   73  	unsigned long pos = ctx->pos;
80886298c07234 Al Viro               2013-05-15   74  	struct inode *inode = file_inode(file);
^1da177e4c3f41 Linus Torvalds        2005-04-16   75  	struct super_block *sb = inode->i_sb;
^1da177e4c3f41 Linus Torvalds        2005-04-16   76  	unsigned long npages = dir_pages(inode);
80886298c07234 Al Viro               2013-05-15   77  	unsigned offset;
80886298c07234 Al Viro               2013-05-15   78  	unsigned long n;
^1da177e4c3f41 Linus Torvalds        2005-04-16   79  
80886298c07234 Al Viro               2013-05-15   80  	ctx->pos = pos = (pos + SYSV_DIRSIZE-1) & ~(SYSV_DIRSIZE-1);
^1da177e4c3f41 Linus Torvalds        2005-04-16   81  	if (pos >= inode->i_size)
80886298c07234 Al Viro               2013-05-15   82  		return 0;
80886298c07234 Al Viro               2013-05-15   83  
09cbfeaf1a5a67 Kirill A. Shutemov    2016-04-01   84  	offset = pos & ~PAGE_MASK;
09cbfeaf1a5a67 Kirill A. Shutemov    2016-04-01   85  	n = pos >> PAGE_SHIFT;
^1da177e4c3f41 Linus Torvalds        2005-04-16   86  
^1da177e4c3f41 Linus Torvalds        2005-04-16   87  	for ( ; n < npages; n++, offset = 0) {
^1da177e4c3f41 Linus Torvalds        2005-04-16   88  		char *kaddr, *limit;
^1da177e4c3f41 Linus Torvalds        2005-04-16   89  		struct sysv_dir_entry *de;
8dd6c7b2944ce3 Fabio M. De Francesco 2023-01-19   90  		struct page *page;
^1da177e4c3f41 Linus Torvalds        2005-04-16   91  
8dd6c7b2944ce3 Fabio M. De Francesco 2023-01-19   92  		kaddr = dir_get_page(inode, n, &page);
8dd6c7b2944ce3 Fabio M. De Francesco 2023-01-19   93  		if (IS_ERR(kaddr))
^1da177e4c3f41 Linus Torvalds        2005-04-16   94  			continue;
^1da177e4c3f41 Linus Torvalds        2005-04-16   95  		de = (struct sysv_dir_entry *)(kaddr+offset);
09cbfeaf1a5a67 Kirill A. Shutemov    2016-04-01   96  		limit = kaddr + PAGE_SIZE - SYSV_DIRSIZE;
80886298c07234 Al Viro               2013-05-15   97  		for ( ;(char*)de <= limit; de++, ctx->pos += sizeof(*de)) {
^1da177e4c3f41 Linus Torvalds        2005-04-16   98  			char *name = de->name;
^1da177e4c3f41 Linus Torvalds        2005-04-16   99  
^1da177e4c3f41 Linus Torvalds        2005-04-16  100  			if (!de->inode)
^1da177e4c3f41 Linus Torvalds        2005-04-16  101  				continue;
^1da177e4c3f41 Linus Torvalds        2005-04-16  102  
80886298c07234 Al Viro               2013-05-15  103  			if (!dir_emit(ctx, name, strnlen(name,SYSV_NAMELEN),
^1da177e4c3f41 Linus Torvalds        2005-04-16  104  					fs16_to_cpu(SYSV_SB(sb), de->inode),
80886298c07234 Al Viro               2013-05-15  105  					DT_UNKNOWN)) {
^1da177e4c3f41 Linus Torvalds        2005-04-16 @106  				dir_put_page(page);
80886298c07234 Al Viro               2013-05-15  107  				return 0;
^1da177e4c3f41 Linus Torvalds        2005-04-16  108  			}
^1da177e4c3f41 Linus Torvalds        2005-04-16  109  		}
^1da177e4c3f41 Linus Torvalds        2005-04-16  110  		dir_put_page(page);
^1da177e4c3f41 Linus Torvalds        2005-04-16  111  	}
^1da177e4c3f41 Linus Torvalds        2005-04-16  112  	return 0;
^1da177e4c3f41 Linus Torvalds        2005-04-16  113  }
^1da177e4c3f41 Linus Torvalds        2005-04-16  114  

:::::: The code at line 106 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

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