(cherry picked from commit 510cd8252869130a2a9ec6a375bb79a50e25185a)
backport one patch to init string buffer before reading from it Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com> Signed-off-by: Wenchao Hao <haowenchao@huawei.com> (cherry picked from commit fa8dd9f24cffca4c93147c0267f528b1f8b2b539)
Signed-off-by: Wenchao Hao <haowenchao@huawei.com> (cherry picked from commit 6faeb8ad285f2dbb9d7e578d73ba5d36a63f1788)