From: Pali Rohár <pali@kernel.org>
Date: Sat, 5 Nov 2022 16:51:25 +0000 (+0100)
Subject: libpci: mmio-ports: Check for write access to /dev/mem in detect method
X-Git-Tag: v3.9.0~3^2
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=b0c61ad624f8398b91bcdd201cdf13dc02d51372;p=pciutils.git

libpci: mmio-ports: Check for write access to /dev/mem in detect method
---

diff --git a/lib/mmio-ports.c b/lib/mmio-ports.c
index 50cbee7..ae9c30d 100644
--- a/lib/mmio-ports.c
+++ b/lib/mmio-ports.c
@@ -243,9 +243,9 @@ conf1_detect(struct pci_access *a)
       return 0;
     }
 
-  if (access(devmem, R_OK))
+  if (access(devmem, R_OK | W_OK))
     {
-      a->debug("cannot access %s", devmem);
+      a->debug("cannot access %s: %s", devmem, strerror(errno));
       return 0;
     }