[kbuild-all] [android-common:upstream-f2fs-stable-linux-4.14.y 903/1043] fs/crypto/bio.c:96:23: warning: Checking if unsigned variable 'nr_pages' is less than zero.

tree: https://android.googlesource.com/kernel/common upstream-f2fs-stable-linux-4.14.y head: a3a7060dbf1cbd67200c603af058706a8affb127 commit: bee5bd5b8f2ec1010f53d66aa26ac9b23dcdf271 [903/1043] fscrypt: optimize fscrypt_zeroout_range() compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) err = ubifs_read_superblock(c); ^ fs/ubifs/super.c:1210:6: note: Variable 'err' is reassigned a value before the old one has been used. err = -ENOMEM; ^ fs/ubifs/super.c:1238:6: note: Variable 'err' is reassigned a value before the old one has been used. err = ubifs_read_superblock(c); ^ err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0); ^ -- return err; ^ fs/ubifs/sb.c:839:6: note: first condition if (err) ^ fs/ubifs/sb.c:843:9: note: second condition return err; ^ test((utf8len(data, nfdi_test_data[i].str) == nlen)); ^ fs/unicode/utf8-selftest.c:191:3: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test((utf8nlen(data, nfdi_test_data[i].str, len) == nlen)); ^ fs/unicode/utf8-selftest.c:197:4: warning: Conversion of string literal "Unexpected byte 0x%x should be 0x%xn" to bool always evaluates to true. [incorrectStringBooleanError] test_f((c == nfdi_test_data[i].dec[j]), ^ fs/unicode/utf8-selftest.c:203:3: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test((j == nlen)); ^ fs/unicode/utf8-selftest.c:226:3: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test((utf8len(data, nfdicf_test_data[i].str) == nlen)); ^ fs/unicode/utf8-selftest.c:227:3: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test((utf8nlen(data, nfdicf_test_data[i].str, len) == nlen)); ^ fs/unicode/utf8-selftest.c:233:4: warning: Conversion of string literal "Unexpected byte 0x%x should be 0x%xn" to bool always evaluates to true. [incorrectStringBooleanError] test_f((c == nfdicf_test_data[i].ncf[j]), ^ fs/unicode/utf8-selftest.c:239:3: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test((j == nlen)); ^ fs/unicode/utf8-selftest.c:260:3: warning: Conversion of string literal "%s %s comparison mismatchn" to bool always evaluates to true. [incorrectStringBooleanError] test_f(!utf8_strncmp(table, &s1, &s2), ^ fs/unicode/utf8-selftest.c:270:3: warning: Conversion of string literal "%s %s comparison mismatchn" to bool always evaluates to true. [incorrectStringBooleanError] test_f(!utf8_strncasecmp(table, &s1, &s2), ^ fs/unicode/utf8-selftest.c:280:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(utf8version_is_supported(7, 0, 0)); ^ fs/unicode/utf8-selftest.c:283:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(utf8version_is_supported(9, 0, 0)); ^ fs/unicode/utf8-selftest.c:286:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(utf8version_is_supported(latest_maj, latest_min, latest_rev)); ^ fs/unicode/utf8-selftest.c:289:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(!utf8version_is_supported(13, 0, 0)); ^ fs/unicode/utf8-selftest.c:290:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(!utf8version_is_supported(0, 0, 0)); ^ fs/unicode/utf8-selftest.c:291:2: warning: Conversion of string literal "" to bool always evaluates to true. [incorrectStringBooleanError] test(!utf8version_is_supported(-1, -1, -1)); ^ -- err = 0; ^ fs/verity/enable.c:121:0: note: Variable 'err' is reassigned a value before the old one has been used. int err = -ENOMEM; ^ fs/verity/enable.c:150:6: note: Variable 'err' is reassigned a value before the old one has been used. err = 0; ^ -- error = lease_init(filp, type, fl); ^ fs/locks.c:582:0: note: Variable 'error' is reassigned a value before the old one has been used. int error = -ENOMEM; ^ fs/locks.c:587:8: note: Variable 'error' is reassigned a value before the old one has been used. error = lease_init(filp, type, fl); ^ fs/locks.c:976:9: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = FILE_LOCK_DEFERRED; ^ fs/locks.c:973:9: note: Variable 'error' is reassigned a value before the old one has been used. error = -EAGAIN; ^ fs/locks.c:976:9: note: Variable 'error' is reassigned a value before the old one has been used. error = FILE_LOCK_DEFERRED; ^ fs/locks.c:1046:10: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = -EDEADLK; ^ fs/locks.c:1039:10: note: Variable 'error' is reassigned a value before the old one has been used. error = -EAGAIN; ^ fs/locks.c:1046:10: note: Variable 'error' is reassigned a value before the old one has been used. error = -EDEADLK; ^ fs/locks.c:1158:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = -ENOLCK; /* "no luck" */ ^ fs/locks.c:1140:11: note: Variable 'error' is reassigned a value before the old one has been used. error = -ENOLCK; ^ fs/locks.c:1158:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -ENOLCK; /* "no luck" */ ^ fs/locks.c:1162:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = 0; ^ fs/locks.c:1158:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -ENOLCK; /* "no luck" */ ^ fs/locks.c:1162:8: note: Variable 'error' is reassigned a value before the old one has been used. error = 0; ^ fs/locks.c:1752:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = -EINVAL; ^ fs/locks.c:1722:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EAGAIN; ^ fs/locks.c:1752:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:1767:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = check_conflicting_open(dentry, arg, lease->fl_flags); ^ fs/locks.c:1752:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:1767:8: note: Variable 'error' is reassigned a value before the old one has been used. error = check_conflicting_open(dentry, arg, lease->fl_flags); ^ fs/locks.c:2024:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = security_file_lock(f.file, lock->fl_type); ^ fs/locks.c:2003:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EBADF; ^ fs/locks.c:2024:8: note: Variable 'error' is reassigned a value before the old one has been used. error = security_file_lock(f.file, lock->fl_type); ^ fs/locks.c:2140:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = flock_to_posix_lock(filp, fl, flock); ^ fs/locks.c:2136:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:2140:8: note: Variable 'error' is reassigned a value before the old one has been used. error = flock_to_posix_lock(filp, fl, flock); ^ fs/locks.c:2154:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = vfs_test_lock(filp, fl); ^ fs/locks.c:2145:9: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:2154:8: note: Variable 'error' is reassigned a value before the old one has been used. error = vfs_test_lock(filp, fl); ^ error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2287:9: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = -EINVAL; ^ fs/locks.c:2308:8: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = do_lock_file_wait(filp, cmd, file_lock); ^ error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2296:9: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = -EINVAL; ^ fs/locks.c:2308:8: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2355:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = flock64_to_posix_lock(filp, fl, flock); ^ fs/locks.c:2351:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:2355:8: note: Variable 'error' is reassigned a value before the old one has been used. error = flock64_to_posix_lock(filp, fl, flock); ^ fs/locks.c:2369:8: warning: Variable 'error' is reassigned a value before the old one has been used. [redundantAssignment] error = vfs_test_lock(filp, fl); ^ fs/locks.c:2360:9: note: Variable 'error' is reassigned a value before the old one has been used. error = -EINVAL; ^ fs/locks.c:2369:8: note: Variable 'error' is reassigned a value before the old one has been used. error = vfs_test_lock(filp, fl); ^ fs/locks.c:2439:8: warning: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? [redundantAssignInSwitch] error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2418:9: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = -EINVAL; ^ fs/locks.c:2439:8: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2439:8: warning: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? [redundantAssignInSwitch] error = do_lock_file_wait(filp, cmd, file_lock); ^ fs/locks.c:2427:9: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = -EINVAL; ^ fs/locks.c:2439:8: note: Variable 'error' is reassigned a value before the old one has been used. 'break;' missing? error = do_lock_file_wait(filp, cmd, file_lock); ^ -- struct posix_acl_xattr_entry *entry = (void *)(header + 1), *end; ^ fs/posix_acl.c:675:6: note: Assuming that condition '!value' is not redundant if (!value) ^ fs/posix_acl.c:669:42: note: Assignment 'header=value', assigned value is 0 struct posix_acl_xattr_header *header = value; ^ fs/posix_acl.c:670:56: note: Null pointer addition struct posix_acl_xattr_entry *entry = (void *)(header + 1), *end; ^ fs/posix_acl.c:728:68: warning: Either the condition '!value' is redundant or there is pointer arithmetic with NULL pointer. [nullPointerArithmeticRedundantCheck] const struct posix_acl_xattr_entry *entry = (const void *)(header + 1), *end; ^ fs/posix_acl.c:733:6: note: Assuming that condition '!value' is not redundant if (!value) ^ fs/posix_acl.c:727:48: note: Assignment 'header=value', assigned value is 0 const struct posix_acl_xattr_header *header = value; ^ fs/posix_acl.c:728:68: note: Null pointer addition const struct posix_acl_xattr_entry *entry = (const void *)(header + 1), *end; ^ ret = posix_acl_create_masq(clone, mode); ^ fs/posix_acl.c:602:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = -ENOMEM; ^ fs/posix_acl.c:607:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = posix_acl_create_masq(clone, mode); ^ if (clen <= 0 || clen > UBIFS_BLOCK_SIZE || clen > dlen) { ^ key_ref = make_key_ref(key, 1); ^ security/keys/process_keys.c:664:12: note: Variable 'key_ref' is reassigned a value before the old one has been used. key_ref = ERR_PTR(-EKEYREVOKED); ^ security/keys/process_keys.c:674:11: note: Variable 'key_ref' is reassigned a value before the old one has been used. key_ref = make_key_ref(key, 1); ^ security/keys/process_keys.c:688:11: warning: Variable 'key_ref' is reassigned a value before the old one has been used. [redundantAssignment] key_ref = make_key_ref(key, 0); ^ security/keys/process_keys.c:678:11: note: Variable 'key_ref' is reassigned a value before the old one has been used. key_ref = ERR_PTR(-EINVAL); ^ security/keys/process_keys.c:688:11: note: Variable 'key_ref' is reassigned a value before the old one has been used. key_ref = make_key_ref(key, 0); ^ ret = key_task_permission(key_ref, ctx.cred, perm); ^ security/keys/process_keys.c:731:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = -EIO; ^ security/keys/process_keys.c:737:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = key_task_permission(key_ref, ctx.cred, perm); ^ error = security_sb_kern_mount(sb, flags, secdata); ^ fs/super.c:1213:0: note: Variable 'error' is reassigned a value before the old one has been used. int error = -ENOMEM; ^ fs/super.c:1235:8: note: Variable 'error' is reassigned a value before the old one has been used. error = security_sb_kern_mount(sb, flags, secdata); ^ fs/super.c:1039:48: warning: Clarify calculation precedence for '&' and '?'. [clarifyCalculation] err = fill_super(sb, data, flags & SB_SILENT ? 1 : 0); ^ fs/super.c:1168:48: warning: Clarify calculation precedence for '&' and '?'. [clarifyCalculation] error = fill_super(s, data, flags & SB_SILENT ? 1 : 0); ^ fs/super.c:1194:49: warning: Clarify calculation precedence for '&' and '?'. [clarifyCalculation] error = fill_super(s, data, flags & SB_SILENT ? 1 : 0); ^ fs/super.c:1122:49: warning: Clarify calculation precedence for '&' and '?'. [clarifyCalculation] error = fill_super(s, data, flags & SB_SILENT ? 1 : 0); ^ -- fs/dcache.c:1634:23: warning: Possible null pointer dereference: name [nullPointer] dentry->d_name.len = name->len; ^ fs/dcache.c:1705:50: note: Calling function '__d_alloc', 2nd argument 'NULL' value is 0 struct dentry *dentry = __d_alloc(parent->d_sb, NULL); ^ fs/dcache.c:1634:23: note: Null pointer dereference dentry->d_name.len = name->len; ^ fs/dcache.c:1635:24: warning: Possible null pointer dereference: name [nullPointer] dentry->d_name.hash = name->hash; ^ fs/dcache.c:1705:50: note: Calling function '__d_alloc', 2nd argument 'NULL' value is 0 struct dentry *dentry = __d_alloc(parent->d_sb, NULL); ^ fs/dcache.c:1635:24: note: Null pointer dereference dentry->d_name.hash = name->hash; ^ fs/dcache.c:1636:16: warning: Possible null pointer dereference: name [nullPointer] memcpy(dname, name->name, name->len); ^ fs/dcache.c:1705:50: note: Calling function '__d_alloc', 2nd argument 'NULL' value is 0 struct dentry *dentry = __d_alloc(parent->d_sb, NULL); ^ fs/dcache.c:1636:16: note: Null pointer dereference memcpy(dname, name->name, name->len); ^ fs/dcache.c:1637:8: warning: Possible null pointer dereference: name [nullPointer] dname[name->len] = 0; ^ fs/dcache.c:1705:50: note: Calling function '__d_alloc', 2nd argument 'NULL' value is 0 struct dentry *dentry = __d_alloc(parent->d_sb, NULL); ^ fs/dcache.c:1637:8: note: Null pointer dereference dname[name->len] = 0; ^ fs/dcache.c:2948:6: warning: Variable 'ret' is reassigned a value before the old one has been used. [redundantAssignment] ret = 0; ^ fs/dcache.c:2933:0: note: Variable 'ret' is reassigned a value before the old one has been used. int ret = -ESTALE; ^ fs/dcache.c:2948:6: note: Variable 'ret' is reassigned a value before the old one has been used. ret = 0; ^ struct mount *parent = ACCESS_ONCE(mnt->mnt_parent); ^ fs/dcache.c:3122:19: note: Shadowed declaration struct dentry * parent; ^ fs/dcache.c:3125:18: note: Shadow variable struct mount *parent = ACCESS_ONCE(mnt->mnt_parent); ^ -- err = 0; ^ fs/crypto/crypto.c:307:6: note: Variable 'err' is reassigned a value before the old one has been used. err = -ENOMEM; ^ fs/crypto/crypto.c:313:6: note: Variable 'err' is reassigned a value before the old one has been used. err = 0; ^ fs/crypto/crypto.c:366:6: warning: Variable 'err' is reassigned a value before the old one has been used. [redundantAssignment] err = fscrypt_init_keyring(); ^ fs/crypto/crypto.c:346:0: note: Variable 'err' is reassigned a value before the old one has been used. int err = -ENOMEM; ^ fs/crypto/crypto.c:366:6: note: Variable 'err' is reassigned a value before the old one has been used. err = fscrypt_init_keyring(); ^ if (WARN_ON_ONCE(len <= 0)) ^ fs/crypto/crypto.c:170:23: warning: Checking if unsigned variable 'len' is less than zero. [unsignedLessThanZero] if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize))) ^ fs/crypto/crypto.c:248:23: warning: Checking if unsigned variable 'len' is less than zero. [unsignedLessThanZero] if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize))) ^ -- err = add_master_key(sb, &secret, &arg.key_spec); ^ fs/crypto/keyring.c:624:7: note: Variable 'err' is reassigned a value before the old one has been used. 'break;' missing? err = -EFAULT; ^ fs/crypto/keyring.c:670:6: note: Variable 'err' is reassigned a value before the old one has been used. 'break;' missing? err = add_master_key(sb, &secret, &arg.key_spec); ^ err = add_master_key(sb, &secret, &arg.key_spec); ^ fs/crypto/keyring.c:636:7: note: Variable 'err' is reassigned a value before the old one has been used. 'break;' missing? err = -EACCES; ^ fs/crypto/keyring.c:670:6: note: Variable 'err' is reassigned a value before the old one has been used. 'break;' missing? err = add_master_key(sb, &secret, &arg.key_spec); ^ err = add_master_key(sb, &secret, &arg.key_spec); ^ fs/crypto/keyring.c:658:7: note: Variable 'err' is reassigned a value before the old one has been used. err = -EFAULT; ^ fs/crypto/keyring.c:670:6: note: Variable 'err' is reassigned a value before the old one has been used. err = add_master_key(sb, &secret, &arg.key_spec); ^ if (WARN_ON(nr_pages <= 0)) ^ -- In file included from fs/ext4/extents.c: return (le16_to_cpu(ext->ee_len) > EXT_INIT_MAX_LEN); ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2238:30: note: Calling function 'ext4_ext_is_unwritten', 1st argument 'ex' value is 0 if (ext4_ext_is_unwritten(ex)) ^ fs/ext4/ext4_extents.h:201:22: note: Null pointer dereference return (le16_to_cpu(ext->ee_len) > EXT_INIT_MAX_LEN); ^ fs/ext4/ext4_extents.h:206:22: warning: Either the condition '!ex' is redundant or there is possible null pointer dereference: ext. [nullPointerRedundantCheck] return (le16_to_cpu(ext->ee_len) <= EXT_INIT_MAX_LEN ? ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2236:40: note: Calling function 'ext4_ext_get_actual_len', 1st argument 'ex' value is 0 es.es_len = ext4_ext_get_actual_len(ex); ^ fs/ext4/ext4_extents.h:206:22: note: Null pointer dereference return (le16_to_cpu(ext->ee_len) <= EXT_INIT_MAX_LEN ? ^ fs/ext4/ext4_extents.h:207:15: warning: Either the condition '!ex' is redundant or there is possible null pointer dereference: ext. [nullPointerRedundantCheck] le16_to_cpu(ext->ee_len) : ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2236:40: note: Calling function 'ext4_ext_get_actual_len', 1st argument 'ex' value is 0 es.es_len = ext4_ext_get_actual_len(ex); ^ fs/ext4/ext4_extents.h:207:15: note: Null pointer dereference le16_to_cpu(ext->ee_len) : ^ fs/ext4/ext4_extents.h:208:16: warning: Either the condition '!ex' is redundant or there is possible null pointer dereference: ext. [nullPointerRedundantCheck] (le16_to_cpu(ext->ee_len) - EXT_INIT_MAX_LEN)); ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2236:40: note: Calling function 'ext4_ext_get_actual_len', 1st argument 'ex' value is 0 es.es_len = ext4_ext_get_actual_len(ex); ^ fs/ext4/ext4_extents.h:208:16: note: Null pointer dereference (le16_to_cpu(ext->ee_len) - EXT_INIT_MAX_LEN)); ^ block = le32_to_cpu(ex->ee_start_lo); ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2237:33: note: Calling function 'ext4_ext_pblock', 1st argument 'ex' value is 0 es.es_pblk = ext4_ext_pblock(ex); ^ fs/ext4/ext4_extents.h:224:22: note: Null pointer dereference block = le32_to_cpu(ex->ee_start_lo); ^ fs/ext4/ext4_extents.h:225:39: warning: Either the condition '!ex' is redundant or there is possible null pointer dereference: ex. [nullPointerRedundantCheck] block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1; ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2237:33: note: Calling function 'ext4_ext_pblock', 1st argument 'ex' value is 0 es.es_pblk = ext4_ext_pblock(ex); ^ fs/ext4/ext4_extents.h:225:39: note: Null pointer dereference block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1; ^ es.es_lblk = le32_to_cpu(ex->ee_block); ^ fs/ext4/extents.c:2196:7: note: Assuming that condition '!ex' is not redundant if (!ex) { ^ fs/ext4/extents.c:2235:29: note: Null pointer dereference es.es_lblk = le32_to_cpu(ex->ee_block); ^ error = ext4_xattr_fiemap(inode, fieinfo); ^ fs/ext4/extents.c:5158:9: note: Variable 'error' is reassigned a value before the old one has been used. error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline, ^ fs/ext4/extents.c:5180:9: note: Variable 'error' is reassigned a value before the old one has been used. error = ext4_xattr_fiemap(inode, fieinfo); ^ fs/ext4/ext4.h:517:2: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] CHECK_FLAG_VALUE(RESERVED); ^ int fb_flags = flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE ? ^ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ^ fs/ext4/extents.c:2504:23: note: Shadowed declaration struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ^ fs/ext4/extents.c:2535:24: note: Shadow variable struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ^ lastoff = page_offset(page) + PAGE_SIZE; ^ fs/ext4/file.c:526:14: note: Variable 'lastoff' is reassigned a value before the old one has been used. lastoff += bh->b_size; ^ fs/ext4/file.c:531:12: note: Variable 'lastoff' is reassigned a value before the old one has been used. lastoff = page_offset(page) + PAGE_SIZE; ^ fs/ext4/ext4.h:517:2: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] CHECK_FLAG_VALUE(RESERVED); ^ fs/ext4/ialloc.c:994:6: warning: Variable 'err' is reassigned a value before the old one has been used. [redundantAssignment] err = -ENOSPC; ^ fs/ext4/ialloc.c:905:6: note: Variable 'err' is reassigned a value before the old one has been used. err = -ENOSPC; ^ fs/ext4/ialloc.c:994:6: note: Variable 'err' is reassigned a value before the old one has been used. err = -ENOSPC; ^ fs/ext4/ialloc.c:964:7: warning: Variable 'err' is reassigned a value before the old one has been used. [redundantAssignment] err = ext4_journal_get_write_access(handle, inode_bitmap_bh); ^ fs/ext4/ialloc.c:915:7: note: Variable 'err' is reassigned a value before the old one has been used. err = -EIO; ^ fs/ext4/ialloc.c:964:7: note: Variable 'err' is reassigned a value before the old one has been used. err = ext4_journal_get_write_access(handle, inode_bitmap_bh); ^ int count; ^ fs/ext4/ialloc.c:268:22: note: Shadowed declaration int fatal = 0, err, count, cleared; ^ fs/ext4/ialloc.c:375:8: note: Shadow variable int count; ^ fs/ext4/ialloc.c:1055:27: warning: Local variable grp shadows outer variable [shadowVar] struct ext4_group_info *grp = ext4_get_group_info(sb, group); ^ fs/ext4/ialloc.c:791:26: note: Shadowed declaration struct ext4_group_info *grp; ^ fs/ext4/ialloc.c:1055:27: note: Shadow variable struct ext4_group_info *grp = ext4_get_group_info(sb, group); ^ fs/ext4/ext4.h:517:2: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] CHECK_FLAG_VALUE(RESERVED); ^ fs/ext4/ialloc.c:966:4: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:965:7: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:966:4: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1001:3: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1000:6: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1001:3: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1008:3: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1007:6: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1008:3: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1026:4: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1024:7: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1026:4: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1047:4: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1046:7: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1047:4: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1097:3: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1096:6: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1097:3: note: identical inner condition: err ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1205:3: warning: Identical inner 'if' condition is always true. [identicalInnerCondition] ext4_std_error(sb, err); ^ fs/ext4/ialloc.c:1204:6: note: outer condition: err if (err) { ^ fs/ext4/ialloc.c:1205:3: note: identical inner condition: err ext4_std_error(sb, err); ^ *((unsigned int *) ptr)); ^ fs/ext4/sysfs.c:296:7: note: Assuming that condition '!ptr' is not redundant if (!ptr) ^ fs/ext4/sysfs.c:294:24: note: Null pointer dereference *((unsigned int *) ptr)); ^ fs/ext4/ext4.h:517:2: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] CHECK_FLAG_VALUE(RESERVED); ^ return test_opt(sbi, XATTR_USER); ^ fs/f2fs/f2fs.h:2126:15: warning: Local variable valid_node_count shadows outer function [shadowFunction] unsigned int valid_node_count, user_block_count; ^ fs/f2fs/f2fs.h:2222:28: note: Shadowed declaration static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) ^ fs/f2fs/f2fs.h:2126:15: note: Shadow variable unsigned int valid_node_count, user_block_count; ^ error = __block_write_begin(page, from, len, gfs2_block_map); ^ fs/gfs2/aops.c:719:8: note: Variable 'error' is reassigned a value before the old one has been used. error = -ENOMEM; ^ fs/gfs2/aops.c:739:8: note: Variable 'error' is reassigned a value before the old one has been used. error = __block_write_begin(page, from, len, gfs2_block_map); ^ req->bpr_ptr = bmap->b_last_allocated_ptr++; ^ fs/nilfs2/btree.c:1877:8: note: Assignment 'di=NULL', assigned value is 0 di = NULL; ^ fs/nilfs2/btree.c:1882:59: note: Calling function 'nilfs_btree_prepare_convert_and_insert', 3rd argument 'di' value is 0 ret = nilfs_btree_prepare_convert_and_insert(btree, key, di, ni, &bh, ^ fs/nilfs2/btree.c:1754:44: note: Calling function 'nilfs_bmap_prepare_alloc_ptr', 2nd argument 'dreq' value is 0 ret = nilfs_bmap_prepare_alloc_ptr(btree, dreq, dat); ^ fs/nilfs2/bmap.h:194:2: note: Null pointer dereference req->bpr_ptr = bmap->b_last_allocated_ptr++; ^ vim +/nr_pages +96 fs/crypto/bio.c 43 44 /** 45 * fscrypt_zeroout_range() - zero out a range of blocks in an encrypted file 46 * @inode: the file's inode 47 * @lblk: the first file logical block to zero out 48 * @pblk: the first filesystem physical block to zero out 49 * @len: number of blocks to zero out 50 * 51 * Zero out filesystem blocks in an encrypted regular file on-disk, i.e. write 52 * ciphertext blocks which decrypt to the all-zeroes block. The blocks must be 53 * both logically and physically contiguous. It's also assumed that the 54 * filesystem only uses a single block device, ->s_bdev. 55 * 56 * Note that since each block uses a different IV, this involves writing a 57 * different ciphertext to each block; we can't simply reuse the same one. 58 * 59 * Return: 0 on success; -errno on failure. 60 */ 61 int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk, 62 sector_t pblk, unsigned int len) 63 { 64 const unsigned int blockbits = inode->i_blkbits; 65 const unsigned int blocksize = 1 << blockbits; 66 const unsigned int blocks_per_page_bits = PAGE_SHIFT - blockbits; 67 const unsigned int blocks_per_page = 1 << blocks_per_page_bits; 68 struct page *pages[16]; /* write up to 16 pages at a time */ 69 unsigned int nr_pages; 70 unsigned int i; 71 unsigned int offset; 72 struct bio *bio; 73 int ret, err; 74 75 if (len == 0) 76 return 0; 77 78 BUILD_BUG_ON(ARRAY_SIZE(pages) > BIO_MAX_PAGES); 79 nr_pages = min_t(unsigned int, ARRAY_SIZE(pages), 80 (len + blocks_per_page - 1) >> blocks_per_page_bits); 81 82 /* 83 * We need at least one page for ciphertext. Allocate the first one 84 * from a mempool, with __GFP_DIRECT_RECLAIM set so that it can't fail. 85 * 86 * Any additional page allocations are allowed to fail, as they only 87 * help performance, and waiting on the mempool for them could deadlock. 88 */ 89 for (i = 0; i < nr_pages; i++) { 90 pages[i] = fscrypt_alloc_bounce_page(i == 0 ? GFP_NOFS : 91 GFP_NOWAIT | __GFP_NOWARN); 92 if (!pages[i]) 93 break; 94 } 95 nr_pages = i; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org