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ext4: use memcpy() instead of strcpy()

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The strcpy() function is considered dangerous and eeeevil by people
who are using sophisticated code analysis tools such as "grep".  This
is true even when a quick inspection would show that the source is a
constant string ("." or "..") and the destination is a fixed array
which is guaranteed to have enough space.  Make the "grep" code
analysis tool happy by using memcpy() isstead of strcpy().  :-)

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://patch.msgid.link/20250712181249.434530-2-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2025-07-12 14:12:48 -04:00
parent 3658b8b339
commit a35454ecf8
2 changed files with 4 additions and 4 deletions
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4
fs/ext4/inline.c
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@ -1317,7 +1317,7 @@ int ext4_inlinedir_to_tree(struct file *dir_file,
if (pos == 0) {
fake.inode = cpu_to_le32(inode->i_ino);
fake.name_len = 1;
strcpy(fake.name, ".");
memcpy(fake.name, ".", 2);
fake.rec_len = ext4_rec_len_to_disk(
ext4_dir_rec_len(fake.name_len, NULL),
inline_size);
@ -1327,7 +1327,7 @@ int ext4_inlinedir_to_tree(struct file *dir_file,
} else if (pos == EXT4_INLINE_DOTDOT_OFFSET) {
fake.inode = cpu_to_le32(parent_ino);
fake.name_len = 2;
strcpy(fake.name, "..");
memcpy(fake.name, "..", 3);
fake.rec_len = ext4_rec_len_to_disk(
ext4_dir_rec_len(fake.name_len, NULL),
inline_size);

4
fs/ext4/namei.c
View File

@ -2924,7 +2924,7 @@ struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
de->name_len = 1;
de->rec_len = ext4_rec_len_to_disk(ext4_dir_rec_len(de->name_len, NULL),
blocksize);
strcpy(de->name, ".");
memcpy(de->name, ".", 2);
ext4_set_de_type(inode->i_sb, de, S_IFDIR);
de = ext4_next_entry(de, blocksize);
@ -2938,7 +2938,7 @@ struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
de->rec_len = ext4_rec_len_to_disk(
ext4_dir_rec_len(de->name_len, NULL),
blocksize);
strcpy(de->name, "..");
memcpy(de->name, "..", 3);
ext4_set_de_type(inode->i_sb, de, S_IFDIR);
return ext4_next_entry(de, blocksize);