[Qemu-devel] [PATCHv2] linux-user: Fix sched_getaffinity mask size

[Samuel Thibault]

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 <address@hidden>

---
Difference from v1:
- simplify fix
---
 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 82b35a6bdf..bcda3362fc 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -10493,7 +10493,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long 
arg1,
                     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;
-- 
2.15.1