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cc344f1513
Backporting following fixes:
a72457b61df0 libubus: increase stack depth for processing obj msgs
ef038488edc3 libubus: process pending messages in data handler if stack depth is 0
2099bb3ad997 libubus: use list_empty/list_first_entry in ubus_process_pending_msg
where at least commit 2099bb3ad997 ("libubus: use
list_empty/list_first_entry in ubus_process_pending_msg") fixes UAF
issue I've introduced in commit c5f2053dfcfd ("workaround possibly false
positive uses of memory after it is freed") while fixing another false
positive UAF reported[1] by clang's static analyzer.
Those fixes are being used in master/21.02 for about 6 months, so should
be tested enough and considered for backporting. I've runtested those
fixes on mvebu/turris-omnia and ipq40xx/glinet-b1300 devices.
1. https://openwrt.gitlab.io/-/project/ubus/-/jobs/2096090992/artifacts/build/scan/2022-02-15-150310-70-1/index.html
Signed-off-by: Petr Štetiar <ynezz@true.cz>
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