[PATCH 4/4] um: Use correct data source in fpregs_legacy_set()

[Tiwei Bie]

Read from the buffer pointed to by 'from' instead of '&buf', as
'buf' contains no valid data when 'ubuf' is NULL.

Fixes: b1e1bd2e6943 ("um: Add helper functions to get/set state for SECCOMP")
Signed-off-by: Tiwei Bie <tiwei....@antgroup.com>
---
 arch/x86/um/ptrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/um/ptrace.c b/arch/x86/um/ptrace.c
index 3275870330fe..fae8aabad10f 100644
--- a/arch/x86/um/ptrace.c
+++ b/arch/x86/um/ptrace.c
@@ -161,7 +161,7 @@ static int fpregs_legacy_set(struct task_struct *target,
                from = kbuf;
        }
 
-       return um_fxsr_from_i387(fxsave, &buf);
+       return um_fxsr_from_i387(fxsave, from);
 }
 #endif
 
-- 
2.34.1