[PATCH] vhost/crypto: fix out of bound access

[Fan Zhang]

Coverity issue: 379211

Fixes: 4414bb67010d ("vhost/crypto: fix build with GCC 12")
Cc: david.march...@redhat.com

Signed-off-by: Fan Zhang <roy.fan.zh...@intel.com>
---
 lib/vhost/vhost_crypto.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/vhost/vhost_crypto.c b/lib/vhost/vhost_crypto.c
index 54946f46d9..e9c3322d20 100644
--- a/lib/vhost/vhost_crypto.c
+++ b/lib/vhost/vhost_crypto.c
@@ -574,12 +574,11 @@ copy_data_from_desc(void *dst, struct 
vhost_crypto_data_req *vc_req,
 
        remain = RTE_MIN(desc->len, size);
        addr = desc->addr;
-       do {
-               uint64_t len;
-               void *src;
 
-               len = remain;
-               src = IOVA_TO_VVA(void *, vc_req, addr, &len, VHOST_ACCESS_RO);
+        while (remain) {
+                uint64_t len = remain;
+               void *src = IOVA_TO_VVA(void *, vc_req, addr, &len, 
VHOST_ACCESS_RO);
+
                if (unlikely(src == NULL || len == 0))
                        return 0;
 
@@ -588,7 +587,7 @@ copy_data_from_desc(void *dst, struct vhost_crypto_data_req 
*vc_req,
                /* cast is needed for 32-bit architecture */
                dst = RTE_PTR_ADD(dst, (size_t)len);
                addr += len;
-       } while (unlikely(remain != 0));
+        }
 
        return RTE_MIN(desc->len, size);
 }
-- 
2.34.1