android: binder: Move buffer out of area shared with user space

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Binder driver allocates buffer meta data in a region that is mapped
in user space. These meta data contain pointers in the kernel.

This patch allocates buffer meta data on the kernel heap that is
not mapped in user space, and uses a pointer to refer to the data mapped.

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

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Sherry Yang 2017-08-23 08:46:41 -07:00 • committed by Greg Kroah-Hartman

parent 4175e2b46f

commit 74310e06be

3 changed files with 90 additions and 67 deletions

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144

drivers/android/binder_alloc.c

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2

drivers/android/binder_alloc.h

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11

drivers/android/binder_alloc_selftest.c

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