Re: [LTP] [PATCH] syscalls/setsockopt09: Add another linux git

["xuyang2018.jy@fujitsu.com" <xuyang2018.jy@fujitsu.com>]

Hi Martin
> On 04. 03. 22 4:24, xuyang2018.jy@fujitsu.com wrote:
>> Hi Petr
>>> Hi Xu,
>>>
>>>> On centos7.9ga, I still hit another crash problem because of use-after-free in
>>>> prb_retire_rx_blk_timer_expired(). Since we free it when timer expired, so this
>>>> case will crash after we print TPASS info.
>>>
>>> Reviewed-by: Petr Vorel<pvorel@suse.cz>
>>>
>>> LGTM.
>>> I tested two old kernels, the one with patch survives, the other got reboot.
>>>
>>> BTW funny enough the affected system manages to print "TPASS: Nothing bad
>>> happened, probably" before reboot :).
>> Yes, it crash when timer expired, so it will print TPASS before reboot.
>> Also, I try sleep 10ms, but it still print TPASS and reboot after serval
>> seconds.
>
> The timeout is controlled by req.tp_retire_blk_tov and the value is in
> milliseconds. So usleep(req.tp_retire_blk_tov * 3000) should be enough.
I tested this on my vm, it still can't ensure hit the old crash before 
print PASS log.

Best Regards
Yang Xu
>

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