ion: replace userspace handle cookies with idr

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Userspace handles should not leak kernel virtual addresses to
userspace.  They have to be validated by looking them up in an
rbtree anyways, so replace them with an idr and validate them
by using idr_find to convert the id number to the struct
ion_handle pointer.

Signed-off-by: Colin Cross <ccross@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Colin Cross 2013-12-13 14:24:50 -08:00 • committed by Greg Kroah-Hartman

parent 9e907654d3

commit 47b404580b

1 changed files with 71 additions and 36 deletions

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drivers/staging/android/ion/ion.c

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