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block: bfq: swap puts in bfqg_and_blkg_put
authorKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Thu, 6 Sep 2018 08:05:44 +0000 (11:05 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 19 Sep 2018 20:41:20 +0000 (22:41 +0200)
commitc583d8956d83261236b083c998e6f393184acb0a
tree2420ff2b8b0e02098f6d863d1d8d817f86e6ca8etree
parentd927dea6392d5445a62f104baf8881ff5095d3bacommit | diff
block: bfq: swap puts in bfqg_and_blkg_put

commit d5274b3cd6a814ccb2f56d81ee87cbbf51bd4cf7 upstream.

Fix trivial use-after-free. This could be last reference to bfqg.

Fixes: 8f9bebc33dd7 ("block, bfq: access and cache blkg data only when safe")
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
block/bfq-cgroup.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git