Martijn Coenen eb220f5318 ANDROID: binder: don't check prio permissions on restore. ...

Because we have disabled RT priority inheritance for
the regular binder domain, the following can happen:

1) thread A (prio 98) calls into thread B
2) because RT prio inheritance is disabled, thread B
   runs at the lowest nice (prio 100) instead
3) thread B calls back into A; A will run at prio 100
   for the duration of the transaction
4) When thread A is done with the call from B, we will
   try to restore the prio back to 98. But, we fail
   because the process doesn't hold CAP_SYS_NICE,
   neither is RLIMIT_RT_PRIO set.

While the proper fix going forward will be to
correctly apply CAP_SYS_NICE or RLIMIT_RT_PRIO,
for now it seems reasonable to not check permissions
on the restore path.

Change-Id: Ibede5960c9b7bb786271c001e405de50be64d944
Signed-off-by: Martijn Coenen <maco@android.com>

2017-08-11 19:31:04 +05:30

..

binder_alloc.c

FROMLIST: binder: add more debug info when allocation fails.

2017-08-11 19:31:04 +05:30

binder_alloc.h

FROMLIST: binder: protect against two threads freeing buffer

2017-08-11 19:31:04 +05:30

binder_trace.h

FROMLIST: binder: refactor binder ref inc/dec for thread safety

2017-08-11 19:31:04 +05:30

binder.c

ANDROID: binder: don't check prio permissions on restore.

2017-08-11 19:31:04 +05:30

Kconfig

ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.

2017-04-10 13:28:07 +05:30

Makefile

FROMLIST: binder: move binder_alloc to separate file

2017-08-11 19:31:04 +05:30