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fsverity updates for 5.19

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A couple small cleanups for fs/verity/.
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Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt

Pull fsverity updates from Eric Biggers:
 "A couple small cleanups for fs/verity/"

* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fs-verity: Use struct_size() helper in enable_verity()
  fs-verity: remove unused parameter desc_size in fsverity_create_info()
This commit is contained in:
Linus Torvalds 2022-05-24 12:22:56 -07:00
commit 51518aa68c
4 changed files with 10 additions and 17 deletions
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4
fs/verity/enable.c
View File

@ -202,7 +202,7 @@ static int enable_verity(struct file *filp,
const struct fsverity_operations *vops = inode->i_sb->s_vop;
struct merkle_tree_params params = { };
struct fsverity_descriptor *desc;
size_t desc_size = sizeof(*desc) + arg->sig_size;
size_t desc_size = struct_size(desc, signature, arg->sig_size);
struct fsverity_info *vi;
int err;
@ -281,7 +281,7 @@ static int enable_verity(struct file *filp,
* from disk. This is simpler, and it serves as an extra check that the
* metadata we're writing is valid before actually enabling verity.
*/
vi = fsverity_create_info(inode, desc, desc_size);
vi = fsverity_create_info(inode, desc);
if (IS_ERR(vi)) {
err = PTR_ERR(vi);
goto rollback;

6
fs/verity/fsverity_private.h
View File

@ -122,16 +122,14 @@ int fsverity_init_merkle_tree_params(struct merkle_tree_params *params,
const u8 *salt, size_t salt_size);
struct fsverity_info *fsverity_create_info(const struct inode *inode,
struct fsverity_descriptor *desc,
size_t desc_size);
struct fsverity_descriptor *desc);
void fsverity_set_info(struct inode *inode, struct fsverity_info *vi);
void fsverity_free_info(struct fsverity_info *vi);
int fsverity_get_descriptor(struct inode *inode,
struct fsverity_descriptor **desc_ret,
size_t *desc_size_ret);
struct fsverity_descriptor **desc_ret);
int __init fsverity_init_info_cache(void);
void __init fsverity_exit_info_cache(void);

12
fs/verity/open.c
View File

@ -147,8 +147,7 @@ static int compute_file_digest(struct fsverity_hash_alg *hash_alg,
* fsverity_descriptor must have already undergone basic validation.
*/
struct fsverity_info *fsverity_create_info(const struct inode *inode,
struct fsverity_descriptor *desc,
size_t desc_size)
struct fsverity_descriptor *desc)
{
struct fsverity_info *vi;
int err;
@ -264,8 +263,7 @@ static bool validate_fsverity_descriptor(struct inode *inode,
* the filesystem, and do basic validation of it.
*/
int fsverity_get_descriptor(struct inode *inode,
struct fsverity_descriptor **desc_ret,
size_t *desc_size_ret)
struct fsverity_descriptor **desc_ret)
{
int res;
struct fsverity_descriptor *desc;
@ -297,7 +295,6 @@ int fsverity_get_descriptor(struct inode *inode,
}
*desc_ret = desc;
*desc_size_ret = res;
return 0;
}
@ -306,17 +303,16 @@ static int ensure_verity_info(struct inode *inode)
{
struct fsverity_info *vi = fsverity_get_info(inode);
struct fsverity_descriptor *desc;
size_t desc_size;
int err;
if (vi)
return 0;
err = fsverity_get_descriptor(inode, &desc, &desc_size);
err = fsverity_get_descriptor(inode, &desc);
if (err)
return err;
vi = fsverity_create_info(inode, desc, desc_size);
vi = fsverity_create_info(inode, desc);
if (IS_ERR(vi)) {
err = PTR_ERR(vi);
goto out_free_desc;

5
fs/verity/read_metadata.c
View File

@ -101,7 +101,7 @@ static int fsverity_read_descriptor(struct inode *inode,
size_t desc_size;
int res;
res = fsverity_get_descriptor(inode, &desc, &desc_size);
res = fsverity_get_descriptor(inode, &desc);
if (res)
return res;
@ -119,10 +119,9 @@ static int fsverity_read_signature(struct inode *inode,
void __user *buf, u64 offset, int length)
{
struct fsverity_descriptor *desc;
size_t desc_size;
int res;
res = fsverity_get_descriptor(inode, &desc, &desc_size);
res = fsverity_get_descriptor(inode, &desc);
if (res)
return res;