[PATCH 24/32] s390/cpacf: Unpoison the results of cpacf_trng()

[Ilya Leoshkevich]

Prevent KMSAN from complaining about buffers filled by cpacf_trng()
being uninitialized.

Tested-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
 arch/s390/include/asm/cpacf.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h
index b378e2b57ad8..a72b92770c4b 100644
--- a/arch/s390/include/asm/cpacf.h
+++ b/arch/s390/include/asm/cpacf.h
@@ -473,6 +473,8 @@ static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
 		: [ucbuf] "+&d" (u.pair), [cbuf] "+&d" (c.pair)
 		: [fc] "K" (CPACF_PRNO_TRNG), [opc] "i" (CPACF_PRNO)
 		: "cc", "memory", "0");
+	kmsan_unpoison_memory(ucbuf, ucbuf_len);
+	kmsan_unpoison_memory(cbuf, cbuf_len);
 }
 
 /**
-- 
2.41.0