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Fixes:

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- Fix non-page-aligned NFS READs
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Merge tag 'nfsd-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:
 "Fix non-page-aligned NFS READs"

* tag 'nfsd-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  SUNRPC: Fix NFS READs that start at non-page-aligned offsets
This commit is contained in:
Linus Torvalds 2021-02-05 10:11:14 -08:00
commit 17fbcdf9f1
1 changed files with 4 additions and 3 deletions
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7
net/sunrpc/svcsock.c
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@ -1113,14 +1113,15 @@ static int svc_tcp_sendmsg(struct socket *sock, struct msghdr *msg,
unsigned int offset, len, remaining;
struct bio_vec *bvec;
bvec = xdr->bvec;
offset = xdr->page_base;
bvec = xdr->bvec + (xdr->page_base >> PAGE_SHIFT);
offset = offset_in_page(xdr->page_base);
remaining = xdr->page_len;
flags = MSG_MORE | MSG_SENDPAGE_NOTLAST;
while (remaining > 0) {
if (remaining <= PAGE_SIZE && tail->iov_len == 0)
flags = 0;
len = min(remaining, bvec->bv_len);
len = min(remaining, bvec->bv_len - offset);
ret = kernel_sendpage(sock, bvec->bv_page,
bvec->bv_offset + offset,
len, flags);