Todd Kjos 7a4408c6bd binder: make sure accesses to proc/thread are safe ... binder_thread and binder_proc may be accessed by other threads when processing transaction. Therefore they must be prevented from being freed while a transaction is in progress that references them. This is done by introducing a temporary reference counter for threads and procs that indicates that the object is in use and must not be freed. binder_thread_dec_tmpref() and binder_proc_dec_tmpref() are used to decrement the temporary reference. It is safe to free a binder_thread if there is no reference and it has been released (indicated by thread->is_dead). It is safe to free a binder_proc if it has no remaining threads and no reference. A spinlock is added to the binder_transaction to safely access and set references for t->from and for debug code to safely access t->to_thread and t->to_proc. Signed-off-by: Todd Kjos <tkjos@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-07-17 14:48:23 +02:00
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binder_alloc.c	binder: add more debug info when allocation fails.	2017-07-17 14:47:29 +02:00
binder_alloc.h	binder: protect against two threads freeing buffer	2017-07-17 14:47:29 +02:00
binder_trace.h	binder: separate out binder_alloc functions	2017-07-17 14:47:28 +02:00
binder.c	binder: make sure accesses to proc/thread are safe	2017-07-17 14:48:23 +02:00
Kconfig	binder: Add 'hwbinder' to the default devices	2017-03-17 15:10:49 +09:00
Makefile	binder: move binder_alloc to separate file	2017-07-17 14:47:29 +02:00