[Qemu-devel] [PATCH] linux-user: fix signal number range check

[Andreas Schwab <schwab@linux-m68k.org>]

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>
---
 linux-user/signal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 5da8452..c4d8970 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];
 }
-- 
1.8.3.1


-- 
Andreas Schwab, schwab@linux-m68k.org
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