commit cc77cdc20dbe0ab83b9c51cf3616fb258a2779e0
author duguowei <duguowei@xiaomi.corp-partner.google.com> Mon May 23 23:39:16 2022 +0800
committer Maciej Żenczykowski <maze@google.com> Sat May 28 15:54:41 2022 +0000
tree b099af70bf0fd6248e2bc6a4ff18d3d837ea62ec
parent eef52eea367d40d8bf5d76ad27ae99f23add749b

netd: fixed null pointer dereference exception

The return value of NetlinkEvent::findParam may be nullptr
when bootup, so pass const char * to const std::string&
will trigger 'null pointer dereference'.

F DEBUG   : Cmdline: /system/bin/netd
F DEBUG   : pid: 761, tid: 1382, name: netd  >>> /system/bin/netd <<<
F DEBUG   : uid: 0
F DEBUG   : tagged_addr_ctrl: 0000000000000001
F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
F DEBUG   : Cause: null pointer dereference
F DEBUG   :     x0  0000000000000000  x1  000000759eefd6a0  x2  0000000000000015  x3  0000000000000006
F DEBUG   :     x4  b40000759f00e132  x5  b40000759f01f045  x6  6166202c306e616c  x7  2e3028202965736c
...

Signed-off-by: duguowei <duguowei@xiaomi.corp-partner.google.com>
Change-Id: I5b479239cf2193704ebcf50636219b90aefd1d9d