[LU-19526] iov_iter_is_aligned() should be checking actual buffer address

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Severity: 3
• Assignee: WC Triage
• Reporter: Alex Zhuravlev

Description

reading iov_iter_is_aligned() I noticed the following code:

static inline bool iov_iter_is_aligned(const struct iov_iter *i,
				       unsigned addr_mask, unsigned len_mask)
{
	if (likely(iter_is_ubuf(i))) {
		if (i->count & len_mask)
			return false;
		if ((unsigned long)(iter_iov(i) + i->iov_offset) & addr_mask)
			return false;

notice iter_iov returns struct iovec *, not address of the data.

Issue Links

• is related to: LU-20291 Direct I/O broken on Lustre client with Linux 6.18+