netdev - [PATCH 1/1] io_uring/zcrx: increment fallback loop src offset

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <1b3a55134d4a9a39acab74b8566bf99864393efc.1759914262.git.asml.silence@gmail.com>
Date: Wed,  8 Oct 2025 13:39:01 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: io-uring@...r.kernel.org
Cc: asml.silence@...il.com,
	axboe@...nel.dk,
	netdev@...r.kernel.org
Subject: [PATCH 1/1] 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@...il.com>
---
 io_uring/zcrx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index eb023c4bc0ff..0a43acbdef98 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;
 	}
-- 
2.49.0