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

Tiwei Bie tiwei.btw at antgroup.com
Fri Jun 6 05:44:28 PDT 2025


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.btw at 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




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