From: Dmitry V. Levin <ldv@altlinux.org>
Date: Mon, 16 May 2016 22:00:46 +0000 (+0000)
Subject: Fix printing of invalid struct sembuf.sem_flg
X-Git-Tag: v4.12~148
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=977aee82bff1eb823ee14a9b140c707ae4151fd2;p=strace

Fix printing of invalid struct sembuf.sem_flg

* ipc_sem.c (print_sembuf): Explicitly cast struct sembuf.sem_flg
to unsigned short to avoid potential sign-extension bug when printing
invalid struct sembuf.sem_flg.
---

diff --git a/ipc_sem.c b/ipc_sem.c
index 5b36e76b..ba21b7bb 100644
--- a/ipc_sem.c
+++ b/ipc_sem.c
@@ -49,7 +49,7 @@ print_sembuf(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 	const struct sembuf *sb = elem_buf;
 
 	tprintf("{%u, %d, ", sb->sem_num, sb->sem_op);
-	printflags(semop_flags, sb->sem_flg, "SEM_???");
+	printflags(semop_flags, (unsigned short) sb->sem_flg, "SEM_???");
 	tprints("}");
 
 	return true;