From d990bd76e8d487b16e86f6fa36dd4974b407a3d6 Mon Sep 17 00:00:00 2001
From: Lorenzo Fontana <fontanalorenz@gmail.com>
Date: Fri, 20 Feb 2026 09:06:14 +0100
Subject: [PATCH] pagemap: detect EOF on truncated pages in
 process_async_reads()

Signed-off-by: Lorenzo Fontana <fontanalorenz@gmail.com>
---
 criu/pagemap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/criu/pagemap.c b/criu/pagemap.c
index 6c9c4f7fe..efcce0837 100644
--- a/criu/pagemap.c
+++ b/criu/pagemap.c
@@ -559,6 +559,12 @@ static int process_async_reads(struct page_read *pr)
 			return -1;
 		}
 
+		if (ret == 0 && piov->end != piov->from) {
+			pr_err("Unexpected EOF reading pages: expected %ju more bytes at offset %ju\n",
+			       piov->end - piov->from, piov->from);
+			return -1;
+		}
+
 		if (opts.auto_dedup && punch_hole(pr, piov->from, ret, false))
 			return -1;