[PULL 3/4] linux-user/syscall: Fix missing target_to_host_timespec64() check

[Laurent Vivier <laurent@vivier.eu>]

From: Alistair Francis <alistair.francis@wdc.com>

Coverity pointed out (CID 1432339) that target_to_host_timespec64() can
fail with -TARGET_EFAULT but we never check the return value. This patch
checks the return value and handles the error.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <cad74fae734d2562746b94acd9c34b00081c89bf.1604432881.git.alistair.francis@wdc.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/syscall.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 6fef8181e738..3160a9ba06bd 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7592,7 +7592,9 @@ static int do_futex_time64(target_ulong uaddr, int op, int val, target_ulong tim
     case FUTEX_WAIT_BITSET:
         if (timeout) {
             pts = &ts;
-            target_to_host_timespec64(pts, timeout);
+            if (target_to_host_timespec64(pts, timeout)) {
+                return -TARGET_EFAULT;
+            }
         } else {
             pts = NULL;
         }
-- 
2.28.0