On 20.10.2015 10:33, Kevin Wolf wrote:
> Am 19.10.2015 um 17:53 hat Max Reitz geschrieben:
>> This function removes the BlockDriverState associated with the given
>> BlockBackend from that BB and sets the BDS pointer in the BB to NULL.
>>
>> Signed-off-by: Max Reitz <mre...@redhat.com>
>> ---
>> block/block-backend.c | 12 ++++++++++++
>> include/sysemu/block-backend.h | 1 +
>> 2 files changed, 13 insertions(+)
>>
>> diff --git a/block/block-backend.c b/block/block-backend.c
>> index 19fdaae..eb7409c 100644
>> --- a/block/block-backend.c
>> +++ b/block/block-backend.c
>> @@ -334,6 +334,18 @@ void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend
>> *blk)
>> }
>>
>> /*
>> + * Disassociates the currently associated BlockDriverState from @blk.
>> + */
>> +void blk_remove_bs(BlockBackend *blk)
>> +{
>> + blk_update_root_state(blk);
>> +
>> + bdrv_unref(blk->bs);
>> + blk->bs->blk = NULL;
>
> Use after free?Yes, indeed, will fix. Max >> + blk->bs = NULL; >> +} > > Kevin >
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