[kbuild] fs/9p/vfs_dir.c:211:16: warning: use of uninitialized value '<unknown>' [CWE-457]

:::::: :::::: Manual check reason: "low confidence bisect report" :::::: Manual check reason: "low confidence static check warning: fs/9p/vfs_dir.c:211:16: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]" :::::: BCC: lkp(a)intel.com CC: kbuild-all(a)lists.01.org CC: linux-kernel(a)vger.kernel.org TO: David Howells <dhowells(a)redhat.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 521a547ced6477c54b4b0cc206000406c221b4d6 commit: 24e42e32d347f0787a6f99aeb590f3aaa7221093 9p: Use fscache indexing rewrite and reenable caching date: 8 months ago :::::: branch date: 7 hours ago :::::: commit date: 8 months ago config: arm-randconfig-c002-20220917 (https://download.01.org/0day-ci/archive/20220919/202209191101.P6CJtb56-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 24e42e32d347f0787a6f99aeb590f3aaa7221093 # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross ARCH=arm KBUILD_USERCFLAGS='-fanalyzer -Wno-error' If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp(a)intel.com&gt; gcc_analyzer warnings: (new ones prefixed by >>) fs/9p/vfs_dir.c: In function 'v9fs_dir_release': 211 | __le32 version; | ^~~~~~~ 'v9fs_dir_release': event 1 | | 211 | __le32 version; | | ^~~~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | fs/9p/vfs_dir.c:212:16: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 212 | loff_t i_size; | ^~~~~~ 'v9fs_dir_release': event 1 | | 212 | loff_t i_size; | | ^~~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | -- fs/9p/cache.c: In function 'v9fs_cache_inode_get_cookie': 54 | __le32 version; | ^~~~~~~ 'v9fs_cache_inode_get_cookie': event 1 | | 54 | __le32 version; | | ^~~~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | fs/9p/cache.c:55:16: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 55 | __le64 path; | ^~~~ 'v9fs_cache_inode_get_cookie': event 1 | | 55 | __le64 path; | | ^~~~ | | | | | (1) use of uninitialized value '<unknown>' here | vim +211 fs/9p/vfs_dir.c 7751bdb3a095ad Sripathi Kodi 2010-06-04 198 e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 199 e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 200 /** e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 201 * v9fs_dir_release - close a directory e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 202 * @inode: inode of the directory e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 203 * @filp: file pointer to a directory e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 204 * e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 205 */ e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 206 e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 207 int v9fs_dir_release(struct inode *inode, struct file *filp) e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 208 { 24e42e32d347f0 David Howells 2020-11-18 209 struct v9fs_inode *v9inode = V9FS_I(inode); bd238fb431f319 Latchesar Ionkov 2007-07-10 210 struct p9_fid *fid; 24e42e32d347f0 David Howells 2020-11-18 @211 __le32 version; 24e42e32d347f0 David Howells 2020-11-18 212 loff_t i_size; e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 213 bd238fb431f319 Latchesar Ionkov 2007-07-10 214 fid = filp->private_data; 5d3851530d6d68 Joe Perches 2011-11-28 215 p9_debug(P9_DEBUG_VFS, "inode: %p filp: %p fid: %d\n", 62726a7ab3a6a3 jvrao 2010-08-25 216 inode, filp, fid ? fid->fid : -1); 6636b6dcc3db22 Jianyong Wu 2020-09-23 217 if (fid) { 987a64850996db Greg Kurz 2020-09-23 218 spin_lock(&inode->i_lock); 987a64850996db Greg Kurz 2020-09-23 219 hlist_del(&fid->ilist); 987a64850996db Greg Kurz 2020-09-23 220 spin_unlock(&inode->i_lock); bd238fb431f319 Latchesar Ionkov 2007-07-10 221 p9_client_clunk(fid); 6636b6dcc3db22 Jianyong Wu 2020-09-23 222 } 24e42e32d347f0 David Howells 2020-11-18 223 24e42e32d347f0 David Howells 2020-11-18 224 if ((filp->f_mode & FMODE_WRITE)) { 24e42e32d347f0 David Howells 2020-11-18 225 version = cpu_to_le32(v9inode->qid.version); 24e42e32d347f0 David Howells 2020-11-18 226 i_size = i_size_read(inode); 24e42e32d347f0 David Howells 2020-11-18 227 fscache_unuse_cookie(v9fs_inode_cookie(v9inode), 24e42e32d347f0 David Howells 2020-11-18 228 &version, &i_size); 24e42e32d347f0 David Howells 2020-11-18 229 } else { 24e42e32d347f0 David Howells 2020-11-18 230 fscache_unuse_cookie(v9fs_inode_cookie(v9inode), NULL, NULL); 24e42e32d347f0 David Howells 2020-11-18 231 } e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 232 return 0; e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 233 } e69e7fe5b0c86b Eric Van Hensbergen 2005-09-09 234 -- 0-DAY CI Kernel Test Service https://01.org/lkp