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fs/ntfs3: Fix a couple integer overflows on 32bit systems

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On 32bit systems the "off + sizeof(struct NTFS_DE)" addition can
have an integer wrapping issue.  Fix it by using size_add().

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Dan Carpenter 2025-02-16 23:52:00 +03:00 committed by Konstantin Komarov
parent b432163ebd
commit 5ad414f4df
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GPG Key ID: A9B0331F832407B6
1 changed files with 2 additions and 2 deletions
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4
fs/ntfs3/index.c
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@ -618,7 +618,7 @@ static bool index_hdr_check(const struct INDEX_HDR *hdr, u32 bytes)
u32 off = le32_to_cpu(hdr->de_off);
if (!IS_ALIGNED(off, 8) || tot > bytes || end > tot ||
off + sizeof(struct NTFS_DE) > end) {
size_add(off, sizeof(struct NTFS_DE)) > end) {
/* incorrect index buffer. */
return false;
}
@ -736,7 +736,7 @@ static struct NTFS_DE *hdr_find_e(const struct ntfs_index *indx,
if (end > total)
return NULL;
if (off + sizeof(struct NTFS_DE) > end)
if (size_add(off, sizeof(struct NTFS_DE)) > end)
return NULL;
e = Add2Ptr(hdr, off);