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netfs: Fix netfs_extract_iter_to_sg() for ITER_UBUF/IOVEC

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Fix netfs_extract_iter_to_sg() for ITER_UBUF and ITER_IOVEC to set the
size of the page to the part of the page extracted, not the remaining
amount of data in the extracted page array at that point.

This doesn't yet affect anything as cifs, the only current user, only
passes in non-user-backed iterators.

Fixes: 0185846975 ("netfs: Add a function to extract an iterator into a scatterlist")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: Steve French <sfrench@samba.org>
Cc: Shyam Prasad N <nspmangalore@gmail.com>
Cc: Rohith Surabattula <rohiths.msft@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2023-04-12 13:18:57 +01:00
committed by Linus Torvalds
parent e62252bc55
commit 0bcc402555
1 changed files with 1 additions and 1 deletions
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2
fs/netfs/iterator.c
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@@ -139,7 +139,7 @@ static ssize_t netfs_extract_user_to_sg(struct iov_iter *iter,
size_t seg = min_t(size_t, PAGE_SIZE - off, len);
*pages++ = NULL;
sg_set_page(sg, page, len, off);
sg_set_page(sg, page, seg, off);
sgtable->nents++;
sg++;
len -= seg;