[kbuild-all] [jaegeuk-f2fs-stable:linux-4.19.y 468/951] fs/crypto/fname.c:87:17: sparse: sparse: Variable length array is used.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git linux-4.19.y head: c79c4827e0ed88f2a1c8aae428ccf6da3c104bfe commit: 86eb43f574e090ecb3a2ca7366f4c74bd6ab3df2 [468/951] fscrypt: improve format of no-key names config: m68k-randconfig-s031-20211123 (https://download.01.org/0day-ci/archive/20211124/202111241924.Zr9My34O-lk...) compiler: m68k-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git/c... git remote add jaegeuk-f2fs-stable https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git git fetch --no-tags jaegeuk-f2fs-stable linux-4.19.y git checkout 86eb43f574e090ecb3a2ca7366f4c74bd6ab3df2 # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=m68k SHELL=/bin/bash fs/crypto/ init/ lib/ mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) In file included from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/scatterlist.h:7, from fs/crypto/fname.c:15: include/linux/scatterlist.h: In function 'sg_set_buf': arch/m68k/include/asm/page_mm.h:169:50: warning: ordered comparison of pointer with null pointer [-Wextra] 169 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | ^~ include/asm-generic/bug.h:186:36: note: in definition of macro 'BUG_ON' 186 | #define BUG_ON(condition) do { if (condition) BUG(); } while (0) | ^~~~~~~~~ include/linux/scatterlist.h:143:17: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ fs/crypto/fname.c:55: warning: Function parameter or member 'dirhash' not described in 'fscrypt_nokey_name' fs/crypto/fname.c:55: warning: Function parameter or member 'bytes' not described in 'fscrypt_nokey_name' fs/crypto/fname.c:55: warning: Function parameter or member 'sha256' not described in 'fscrypt_nokey_name' fs/crypto/fname.c:117: warning: Function parameter or member 'inode' not described in 'fscrypt_fname_encrypt' fs/crypto/fname.c:117: warning: Function parameter or member 'iname' not described in 'fscrypt_fname_encrypt' fs/crypto/fname.c:117: warning: Function parameter or member 'out' not described in 'fscrypt_fname_encrypt' fs/crypto/fname.c:117: warning: Function parameter or member 'olen' not described in 'fscrypt_fname_encrypt' fs/crypto/fname.c:169: warning: Function parameter or member 'inode' not described in 'fname_decrypt' fs/crypto/fname.c:169: warning: Function parameter or member 'iname' not described in 'fname_decrypt' fs/crypto/fname.c:169: warning: Function parameter or member 'oname' not described in 'fname_decrypt' fs/crypto/fname.c:218: warning: Function parameter or member 'src' not described in 'base64_encode' fs/crypto/fname.c:218: warning: Function parameter or member 'len' not described in 'base64_encode' fs/crypto/fname.c:218: warning: Function parameter or member 'dst' not described in 'base64_encode' fs/crypto/fname.c:286: warning: Function parameter or member 'inode' not described in 'fscrypt_fname_alloc_buffer' fs/crypto/fname.c:286: warning: Function parameter or member 'max_encrypted_len' not described in 'fscrypt_fname_alloc_buffer' fs/crypto/fname.c:286: warning: Function parameter or member 'crypto_str' not described in 'fscrypt_fname_alloc_buffer' fs/crypto/fname.c:306: warning: Function parameter or member 'crypto_str' not described in 'fscrypt_fname_free_buffer' fs/crypto/fname.c:330: warning: Function parameter or member 'inode' not described in 'fscrypt_fname_disk_to_usr' fs/crypto/fname.c:330: warning: Function parameter or member 'hash' not described in 'fscrypt_fname_disk_to_usr' fs/crypto/fname.c:330: warning: Function parameter or member 'minor_hash' not described in 'fscrypt_fname_disk_to_usr' fs/crypto/fname.c:330: warning: Function parameter or member 'iname' not described in 'fscrypt_fname_disk_to_usr' fs/crypto/fname.c:330: warning: Function parameter or member 'oname' not described in 'fscrypt_fname_disk_to_usr' vim +87 fs/crypto/fname.c 65 66 static int fscrypt_do_sha256(const u8 *data, unsigned int data_len, u8 *result) 67 { 68 struct crypto_shash *tfm = READ_ONCE(sha256_hash_tfm); 69 70 if (unlikely(!tfm)) { 71 struct crypto_shash *prev_tfm; 72 73 tfm = crypto_alloc_shash("sha256", 0, 0); 74 if (IS_ERR(tfm)) { 75 fscrypt_err(NULL, 76 "Error allocating SHA-256 transform: %ld", 77 PTR_ERR(tfm)); 78 return PTR_ERR(tfm); 79 } 80 prev_tfm = cmpxchg(&sha256_hash_tfm, NULL, tfm); 81 if (prev_tfm) { 82 crypto_free_shash(tfm); 83 tfm = prev_tfm; 84 } 85 } 86 { 88 89 desc->tfm = tfm; 90 desc->flags = 0; 91 92 return crypto_shash_digest(desc, data, data_len, result); 93 } 94 } 95 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org