commit 5fdefcf808a6d70a26e4c536cf0a0acad9b0fff3
author Samuel Thibault <samuel.thibault@ens-lyon.org> Sun Feb 11 18:47:04 2018 +0100
committer Laurent Vivier <laurent@vivier.eu> Sun Feb 18 18:52:32 2018 +0100
tree 2be6b405e888714816c58f5eb5c5bde8013e4636
parent 2c418853b9ba099b98834000386f54abe9aaec47

linux-user: Fix sched_getaffinity mask size

We properly computed the capped mask size to be put to the application
buffer, but didn't actually used it. Also, we need to return the capped mask
size instead of 0 on success.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180211174704.27441-1-samuel.thibault@ens-lyon.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/syscall.c

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index effc3a0..e24f43c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -10502,7 +10502,9 @@
                     ret = arg2;
                 }
 
-                ret = host_to_target_cpu_mask(mask, mask_size, arg3, arg2);
+                if (host_to_target_cpu_mask(mask, mask_size, arg3, ret)) {
+                    goto efault;
+                }
             }
         }
         break;