Messages in this thread | | | Date | Fri, 07 Jun 2013 11:29:20 +0200 | From | Jerome Marchand <> | Subject | Re: [PATCH v3 01/10] zram: avoid invalid memory access in zram_exit() |
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On 06/06/2013 06:07 PM, Jiang Liu wrote: > Memory for zram->disk object may have already been freed after returning > from destroy_device(zram), then it's unsafe for zram_reset_device(zram) > to access zram->disk again. > > We can't solve this bug by flipping the order of destroy_device(zram) > and zram_reset_device(zram), that will cause deadlock issues to the > zram sysfs handler. > > So fix it by holding an extra reference to zram->disk before calling > destroy_device(zram). > > Signed-off-by: Jiang Liu <jiang.liu@huawei.com> > Cc: stable@vger.kernel.org
Acked-by: Jerome Marchand <jmarchan@redhat.com>
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