6.12-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit 5ad414f4df2294b28836b5b7b69787659d6aa708 ]
On 32bit systems the "off + sizeof(struct NTFS_DE)" addition can have an integer wrapping issue. Fix it by using size_add().
Fixes: 82cae269cfa9 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ntfs3/index.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 7eb9fae22f8da..78d20e4baa2c9 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -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);