* ixgbevf: bug in error handling
@ 2010-03-11 10:33 Dan Carpenter
2010-03-11 16:58 ` Rose, Gregory V
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2010-03-11 10:33 UTC (permalink / raw)
To: Greg Rose; +Cc: netdev, kernel-janitors
Hi Greg,
drivers/net/ixgbevf/ixgbevf_main.c +3013 ixgbevf_tx_map(96) warn: unsigned 'i' is never less than zero.
3010 while (count >= 0) {
3011 count--;
3012 i--;
3013 if (i < 0)
3014 i += tx_ring->count;
There is a problem here because i is unsigned and just wraps
around instead of being less than 0.
3015 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3016 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3017 }
regards,
dan carpenter
^ permalink raw reply [flat|nested] 2+ messages in thread* RE: ixgbevf: bug in error handling
2010-03-11 10:33 ixgbevf: bug in error handling Dan Carpenter
@ 2010-03-11 16:58 ` Rose, Gregory V
0 siblings, 0 replies; 2+ messages in thread
From: Rose, Gregory V @ 2010-03-11 16:58 UTC (permalink / raw)
To: Dan Carpenter; +Cc: netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
>-----Original Message-----
>From: Dan Carpenter [mailto:error27@gmail.com]
>Sent: Thursday, March 11, 2010 2:33 AM
>To: Rose, Gregory V
>Cc: netdev@vger.kernel.org; kernel-janitors@vger.kernel.org
>Subject: ixgbevf: bug in error handling
>
>Hi Greg,
>
>drivers/net/ixgbevf/ixgbevf_main.c +3013 ixgbevf_tx_map(96) warn:
>unsigned 'i' is never less than zero.
> 3010 while (count >= 0) {
> 3011 count--;
> 3012 i--;
> 3013 if (i < 0)
> 3014 i += tx_ring->count;
>
> There is a problem here because i is unsigned and just wraps
> around instead of being less than 0.
>
> 3015 tx_buffer_info = &tx_ring->tx_buffer_info[i];
> 3016 ixgbevf_unmap_and_free_tx_resource(adapter,
>tx_buffer_info);
> 3017 }
>
>regards,
>dan carpenter
Ouch. Good catch, we'll fix that right away.
- Greg
^ permalink raw reply [flat|nested] 2+ messages in thread
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