transfer_memory_block() leaks an Error object when reading file
/sys/devices/system/memory/memory<INDEX>/state fails with errno other
than ENOENT, and @sys2memblk is false, i.e. when the state file exists
but cannot be read (seems quite unlikely), and this is
guest-set-memory-blocks, not guest-get-memory-blocks.

Plug the leak.

Fixes: bd240fca42d5f072fb758a71720d9de9990ac553
Cc: Michael Roth <mdr...@linux.vnet.ibm.com>
Cc: Hailiang Zhang <zhang.zhanghaili...@huawei.com>
Signed-off-by: Markus Armbruster <arm...@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
---
 qga/commands-posix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index ae1348dc8f..cdbeb59dcc 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -2421,6 +2421,7 @@ static void transfer_memory_block(GuestMemoryBlock 
*mem_blk, bool sys2memblk,
             if (sys2memblk) {
                 error_propagate(errp, local_err);
             } else {
+                error_free(local_err);
                 result->response =
                     GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED;
             }
-- 
2.26.2


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