From: Dmitry V. Levin <ldv@altlinux.org>
Date: Mon, 16 May 2016 22:03:51 +0000 (+0000)
Subject: Fix printing of invalid struct pollfd.events
X-Git-Tag: v4.12~147
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=952d89ba5a1f7131d5b722bd1dd0b69955ca6515;p=strace

Fix printing of invalid struct pollfd.events

* poll.c (print_pollfd): Explicitly cast struct pollfd.events
to unsigned short to avoid potential sign-extension bug when printing
invalid struct pollfd.events.
---

diff --git a/poll.c b/poll.c
index f116cef0..b66c46d8 100644
--- a/poll.c
+++ b/poll.c
@@ -40,7 +40,7 @@ print_pollfd(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 	printfd(tcp, fds->fd);
 	if (fds->fd >= 0) {
 		tprints(", events=");
-		printflags(pollflags, fds->events, "POLL???");
+		printflags(pollflags, (unsigned short) fds->events, "POLL???");
 	}
 	tprints("}");