busybox's ps command does not have 'ax' option.
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CVE-2018-3620: OK (your CPU vendor reported your CPU model as not vulnerable)
ps: invalid option -- 'a'
BusyBox v1.30.1 (2020-01-07 07:47:10 UTC) multi-call binary.
Usage: ps
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And busybox's ps command provides output similar to ax.
This supports busybox's ps command.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>