From: Pavel Begunkov <asml.silence@gmail.com>
Date: Wed, 8 Oct 2025 12:39:01 +0000 (+0100)
Subject: io_uring/zcrx: increment fallback loop src offset
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e9a9dcb4ccb32446165800a9d83058e95c4833d2;p=users%2Fhch%2Fmisc.git

io_uring/zcrx: increment fallback loop src offset

Don't forget to adjust the source offset in io_copy_page(), otherwise
it'll be copying into the same location in some cases for highmem
setups.

Fixes: e67645bb7f3f4 ("io_uring/zcrx: prepare fallback for larger pages")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index ef73440b605a..a816f5902091 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -1079,6 +1079,7 @@ static ssize_t io_copy_page(struct io_copy_cache *cc, struct page *src_page,
 
 		cc->size -= n;
 		cc->offset += n;
+		src_offset += n;
 		len -= n;
 		copied += n;
 	}