From: Dmitry V. Levin <ldv@altlinux.org>
Date: Mon, 16 May 2016 22:05:06 +0000 (+0000)
Subject: Fix printing of invalid struct ifreq.ifr_flags
X-Git-Tag: v4.12~146
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b0695de14f4600d2026390fa36b66d7f0544f9fb;p=strace

Fix printing of invalid struct ifreq.ifr_flags

* sock.c (print_ifreq): Explicitly cast struct ifreq.ifr_flags
to unsigned short to avoid potential sign-extension bug when printing
invalid struct ifreq.ifr_flags.
---

diff --git a/sock.c b/sock.c
index 88a0df53..c9482946 100644
--- a/sock.c
+++ b/sock.c
@@ -97,7 +97,7 @@ print_ifreq(struct tcb *tcp, const unsigned int code, const long arg,
 	case SIOCSIFFLAGS:
 	case SIOCGIFFLAGS:
 		tprints("ifr_flags=");
-		printflags(iffflags, ifr->ifr_flags, "IFF_???");
+		printflags(iffflags, (unsigned short) ifr->ifr_flags, "IFF_???");
 		break;
 	case SIOCSIFMETRIC:
 	case SIOCGIFMETRIC: