From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Fri, 2 Jan 2026 23:55:08 +0000 (-0500)
Subject: NFS/localio: Deal with page bases that are > PAGE_SIZE
X-Git-Tag: v6.18.7~178
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6ea0b7394a443fb6ddd1a3619ccc2f0781a900c;p=thirdparty%2Fkernel%2Fstable.git

NFS/localio: Deal with page bases that are > PAGE_SIZE

[ Upstream commit 60699ab7cbf0a4eb19929cce243002b39c67917d ]

When resending requests, etc, the page base can quickly grow larger than
the page size.

Fixes: 091bdcfcece0 ("nfs/localio: refactor iocb and iov_iter_bvec initialization")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/nfs/localio.c b/fs/nfs/localio.c
index ed2a7efaf8f20..f537bc3386bf2 100644
--- a/fs/nfs/localio.c
+++ b/fs/nfs/localio.c
@@ -461,6 +461,8 @@ nfs_local_iters_init(struct nfs_local_kiocb *iocb, int rw)
 	v = 0;
 	total = hdr->args.count;
 	base = hdr->args.pgbase;
+	pagevec += base >> PAGE_SHIFT;
+	base &= ~PAGE_MASK;
 	while (total && v < hdr->page_array.npages) {
 		len = min_t(size_t, total, PAGE_SIZE - base);
 		bvec_set_page(&iocb->bvec[v], *pagevec, len, base);