block: bfq: swap puts in bfqg_and_blkg_put
commitpull/10/headd5274b3cd6
upstream. Fix trivial use-after-free. This could be last reference to bfqg. Fixes:8f9bebc33d
("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>
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23ecbbad7b
commit
381992bccc
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@ -224,9 +224,9 @@ static void bfqg_and_blkg_get(struct bfq_group *bfqg)
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void bfqg_and_blkg_put(struct bfq_group *bfqg)
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{
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bfqg_put(bfqg);
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blkg_put(bfqg_to_blkg(bfqg));
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bfqg_put(bfqg);
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}
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void bfqg_stats_update_io_add(struct bfq_group *bfqg, struct bfq_queue *bfqq,
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