From: Pali Rohár <pali@kernel.org>
Date: Sun, 26 Dec 2021 22:47:03 +0000 (+0100)
Subject: libpci: Fix intel_sanity_check() function
X-Git-Tag: v3.8.0~76
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=1eb437a40746c1791e7248193a17f92ddbabdd21;p=pciutils.git

libpci: Fix intel_sanity_check() function

Function intel_sanity_check() calls conf1_read() which access d->domain
field. But intel_sanity_check() does not initialize this field and so
conf1_read() access some random data on stack.

Tests showed that intel_sanity_check() always fails as in d->domain is
stored some non-zero number.

Fix this issue by zeroing struct pci_dev d in intel_sanity_check() as
sanity check is verifying PCI devices at domain 0.
---

diff --git a/lib/i386-ports.c b/lib/i386-ports.c
index 8b7ceb7..20bce94 100644
--- a/lib/i386-ports.c
+++ b/lib/i386-ports.c
@@ -75,6 +75,7 @@ intel_sanity_check(struct pci_access *a, struct pci_methods *m)
 {
   struct pci_dev d;
 
+  memset(&d, 0, sizeof(d));
   a->debug("...sanity check");
   d.bus = 0;
   d.func = 0;