From: Andreas Schwab <schwab@linux-m68k.org>
Date: Tue, 2 Jul 2013 13:04:12 +0000 (+0100)
Subject: linux-user: fix signal number range check
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=167c50d8f94e0ffb880aa5cd2a232a3f32f0df1d;p=qmiga%2Fqemu.git

linux-user: fix signal number range check

When translating between host and target signal numbers keep negative
numbers unchanged, avoiding access beyond array bounds.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 878v2b8sek.fsf@igel.home
---

diff --git a/linux-user/signal.c b/linux-user/signal.c
index c4e20dc8b9..d84e189bc8 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -102,14 +102,14 @@ static inline int sas_ss_flags(unsigned long sp)
 
 int host_to_target_signal(int sig)
 {
-    if (sig >= _NSIG)
+    if (sig < 0 || sig >= _NSIG)
         return sig;
     return host_to_target_signal_table[sig];
 }
 
 int target_to_host_signal(int sig)
 {
-    if (sig >= _NSIG)
+    if (sig < 0 || sig >= _NSIG)
         return sig;
     return target_to_host_signal_table[sig];
 }