lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sat, 25 Aug 2012 10:20:43 +0800
From:	Lin Ming <mlin@...pku.edu.cn>
To:	Sylvain Munaut <s.munaut@...tever-company.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org
Subject: Re: NULL deref in bnx2 / crashes ? ( was: netconsole leads to stalled
 CPU task )

On Wed, Aug 22, 2012 at 10:29 PM, Sylvain Munaut
<s.munaut@...tever-company.com> wrote:
> Hi,
>
>> my patch was incomplete, sorry :
>>
>> diff --git a/net/core/netpoll.c b/net/core/netpoll.c
>> index 346b1eb..ddc453b 100644
>> --- a/net/core/netpoll.c
>> +++ b/net/core/netpoll.c
>> @@ -335,8 +335,13 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
>>         /* don't get messages out of order, and no recursion */
>>         if (skb_queue_len(&npinfo->txq) == 0 && !netpoll_owner_active(dev)) {
>>                 struct netdev_queue *txq;
>> +               int queue_index = skb_get_queue_mapping(skb);
>>
>> -               txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
>> +               if (queue_index >= dev->real_num_tx_queues) {
>> +                       queue_index = 0;
>> +                       skb_set_queue_mapping(skb, 0);
>> +               }
>> +               txq = netdev_get_tx_queue(dev, queue_index);
>>
>>                 /* try until next clock tick */
>>                 for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
>
> Ok, I tried this.
>
> The machine with the intel card still hard freeze (no output / no nothing ...)

Did you enable hard lockup detector?

CONFIG_LOCKUP_DETECTOR=y
CONFIG_HARDLOCKUP_DETECTOR=y

> The machine with the bnx2 don't crash anymore and no NULL deref, but
> the modprobe still hangs and I get this every 180 sec or so :
>
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists