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fs/ntfs3: Add null pointer checks 

Added null pointer checks in function ntfs_security_init.
Also added le32_to_cpu in functions ntfs_security_init and indx_read.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2022-12-29 15:44:43 +04:00
parent e479f0a62a
commit fc4992458e
No known key found for this signature in database
GPG Key ID: A9B0331F832407B6
2 changed files with 12 additions and 7 deletions
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16
fs/ntfs3/fsntfs.c
View File

@ -1876,10 +1876,12 @@ int ntfs_security_init(struct ntfs_sb_info *sbi)
goto out;
}
root_sdh = resident_data_ex(attr, sizeof(struct INDEX_ROOT));
if (root_sdh->type != ATTR_ZERO ||
if(!(root_sdh = resident_data_ex(attr, sizeof(struct INDEX_ROOT))) ||
root_sdh->type != ATTR_ZERO ||
root_sdh->rule != NTFS_COLLATION_TYPE_SECURITY_HASH ||
offsetof(struct INDEX_ROOT, ihdr) + root_sdh->ihdr.used > attr->res.data_size) {
offsetof(struct INDEX_ROOT, ihdr) +
le32_to_cpu(root_sdh->ihdr.used) >
le32_to_cpu(attr->res.data_size)) {
err = -EINVAL;
goto out;
}
@ -1895,10 +1897,12 @@ int ntfs_security_init(struct ntfs_sb_info *sbi)
goto out;
}
root_sii = resident_data_ex(attr, sizeof(struct INDEX_ROOT));
if (root_sii->type != ATTR_ZERO ||
if(!(root_sii = resident_data_ex(attr, sizeof(struct INDEX_ROOT))) ||
root_sii->type != ATTR_ZERO ||
root_sii->rule != NTFS_COLLATION_TYPE_UINT ||
offsetof(struct INDEX_ROOT, ihdr) + root_sii->ihdr.used > attr->res.data_size) {
offsetof(struct INDEX_ROOT, ihdr) +
le32_to_cpu(root_sii->ihdr.used) >
le32_to_cpu(attr->res.data_size)) {
err = -EINVAL;
goto out;
}

3
fs/ntfs3/index.c
View File

@ -1102,7 +1102,8 @@ int indx_read(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
}
/* check for index header length */
if (offsetof(struct INDEX_BUFFER, ihdr) + ib->ihdr.used > bytes) {
if (offsetof(struct INDEX_BUFFER, ihdr) + le32_to_cpu(ib->ihdr.used) >
bytes) {
err = -EINVAL;
goto out;
}