[PATCH 1/2] target/s390x: Fix VSTL with a large length

[Ilya Leoshkevich <iii@linux.ibm.com>]

The length is always truncated to 16 bytes. Do not probe more than
that.

Cc: qemu-stable@nongnu.org
Fixes: 0e0a5b49ad58 ("s390x/tcg: Implement VECTOR STORE WITH LENGTH")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 target/s390x/tcg/vec_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/s390x/tcg/vec_helper.c b/target/s390x/tcg/vec_helper.c
index 48d86722b2d..dafc4c3582c 100644
--- a/target/s390x/tcg/vec_helper.c
+++ b/target/s390x/tcg/vec_helper.c
@@ -193,7 +193,7 @@ void HELPER(vstl)(CPUS390XState *env, const void *v1, uint64_t addr,
                   uint64_t bytes)
 {
     /* Probe write access before actually modifying memory */
-    probe_write_access(env, addr, bytes, GETPC());
+    probe_write_access(env, addr, MIN(bytes, 16), GETPC());
 
     if (likely(bytes >= 16)) {
         cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 0), GETPC());
-- 
2.41.0