staging: android: ashmem: Avoid range_alloc() allocation with ashmem_mutex held.
commit ecd182cbf4e107928077866399100228d2359c60 upstream. ashmem_pin() is calling range_shrink() without checking whether range_alloc() succeeded. Also, doing memory allocation with ashmem_mutex held should be avoided because ashmem_shrink_scan() tries to hold it. Therefore, move memory allocation for range_alloc() to ashmem_pin_unpin() and make range_alloc() not to fail. This patch is mostly meant for backporting purpose for fuzz testing on stable/distributor kernels, for there is a plan to remove this code in near future. Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: stable@vger.kernel.org Reviewed-by: NJoel Fernandes <joel@joelfernandes.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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