tree fe5a481b6bc2e1b574242de0b14965780c63da25
parent 17d5e00e88219647feabdecf83dd1a4288f5bb77
author Steven Bennetts <stevenjb@chromium.org> 1621283798 -0700
committer Commit Bot <commit-bot@chromium.org> 1621437509 +0000

shill: CellularCapability3gpp: Fix modem_proxy_ crashes

CellularCapability3gpp::ReleaseProxies is called from
CellularCapability3gpp::Stop_PowerDownCompleted which is called
during disable before the capability is destroyed.

This allows other asynchronous callbacks that access the proxy
to potentially get called and crash.

This CL tests for a null proxy before its use.

BUG=b:188035492
TEST=Check for crashes in shill::CellularCapability3gpp::Stop_Disable

Change-Id: Ie7bcdd8614c14c4aac1946f685f190d68e65cda1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2900892
Tested-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
(cherry picked from commit ca679b818f9941d886511c524af79cc078bbcbfc)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2906272
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>