tree 5ca4e0b91e64fae732a495df6dcea378a572c3cf
parent e3902510417143cd854cc56ed5c814712e0e2299
author Chen Gang <gang.chen@asianux.com> 1366650774 +0000
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074829 +0200

powerpc/pseries/lparcfg: Fix possible overflow are more than 1026

commit 5676005acf26ab7e924a8438ea4746e47d405762 upstream.

need set '\0' for 'local_buffer'.

SPLPAR_MAXLENGTH is 1026, RTAS_DATA_BUF_SIZE is 4096. so the contents of
rtas_data_buf may truncated in memcpy.

if contents are really truncated.
  the splpar_strlen is more than 1026. the next while loop checking will
  not find the end of buffer. that will cause memory access violation.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>