android: binder: Don't get mm from task

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Use binder_alloc struct's mm_struct rather than getting
a reference to the mm struct through get_task_mm to
avoid a potential deadlock between lru lock, task lock and
dentry lock, since a thread can be holding the task lock
and the dentry lock while trying to acquire the lru lock.

Acked-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Sherry Yang <sherryy@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sherry Yang 2017-10-20 20:58:58 -04:00 • committed by Greg Kroah-Hartman

parent 9d35593b4f

commit a0c2baaf81

2 changed files with 9 additions and 14 deletions

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22

drivers/android/binder_alloc.c

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1

drivers/android/binder_alloc.h

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