kernel: convert css_set.refcount from atomic_t to refcount_t

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refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Elena Reshetova 2017-03-08 10:00:40 +02:00 • committed by Tejun Heo

parent 387ad9674b

commit 4b9502e63b

4 changed files with 10 additions and 8 deletions

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3

include/linux/cgroup-defs.h

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5

kernel/cgroup/cgroup-internal.h

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4

kernel/cgroup/cgroup-v1.c

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6

kernel/cgroup/cgroup.c

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