One-element arrays are deprecated, and we are replacing them with flexible
array members instead. So, replace one-element array with flexible-array
member in direntry_uarea structure, and refactor the rest of the code,
accordingly.
Worth mentioning is that before these changes, the original implementation
was returning two-too many bytes in function direntry_create_vi():
fs/reiserfs/item_ops.c:464: int size = sizeof(struct direntry_uarea);
...
fs/reiserfs/item_ops.c-490- size += (dir_u->entry_count * sizeof(short));
...
fs/reiserfs/item_ops.c-517- return size;
Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/290
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
return sizeof(struct virtual_node) +
max(max_num_of_items * sizeof(struct virtual_item),
- sizeof(struct virtual_item) + sizeof(struct direntry_uarea) +
- (max_num_of_entries - 1) * sizeof(__u16));
+ sizeof(struct virtual_item) +
+ struct_size_t(struct direntry_uarea, entry_sizes,
+ max_num_of_entries));
}
/*
struct direntry_uarea {
int flags;
__u16 entry_count;
- __u16 entry_sizes[1];
+ __u16 entry_sizes[];
} __attribute__ ((__packed__));
/***************************************************************************