From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Mon, 17 Apr 2023 07:31:42 +0000 (+0200)
Subject: fincore: open file with PROT_READ for qemu-user
X-Git-Tag: v2.39-rc3~25^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cf3974442fcc951daf1dd48f125dea621b8abe48;p=thirdparty%2Futil-linux.git

fincore: open file with PROT_READ for qemu-user

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---

diff --git a/misc-utils/fincore.c b/misc-utils/fincore.c
index 09f64ed6bd..ead6f7aaf5 100644
--- a/misc-utils/fincore.c
+++ b/misc-utils/fincore.c
@@ -204,7 +204,8 @@ static int fincore_fd (struct fincore_control *ctl,
 		if (len >= (off_t) window_size)
 			len = window_size;
 
-		window = mmap(window, len, PROT_NONE, MAP_PRIVATE, fd, file_offset);
+		/* PROT_NONE is enough for Linux, but qemu-user wants PROT_READ */
+		window = mmap(window, len, PROT_READ, MAP_PRIVATE, fd, file_offset);
 		if (window == MAP_FAILED) {
 			rc = -EINVAL;
 			warn(_("failed to do mmap: %s"), name);