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[PATCH v5 0/3] net: tulip: add checks to avoid OOB access

P J P posted 3 patches 5 years, 10 months ago
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git fetch https://github.com/patchew-project/qemu tags/patchew/20200319174050.759794-1-ppandit@redhat.com
Maintainers: Jason Wang <jasowang@redhat.com>, Sven Schnelle <svens@stackframe.org>
There is a newer version of this series
hw/net/tulip.c | 51 +++++++++++++++++++++++++++++++++++++++++---------
1 file changed, 42 insertions(+), 9 deletions(-)
[PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by P J P 5 years, 10 months ago 
From: Prasad J Pandit <pjp@fedoraproject.org>

Hello,

* This series adds checks to avoid potential OOB access and infinite loop
  issues while processing rx/tx data.

* Tulip tx descriptors are capped at 128 to avoid infinite loop in
  tulip_xmit_list_update(), wrt Tulip kernel driver
  -> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/dec/tulip/tulip.h#n319

* Update v3: add .can_receive routine
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg06275.html

* Update v4: flush queued packets once they are received
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg05868.html

* Update v5: fixed a typo in patch commit message
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg06209.html

Thank you.
--
Prasad J Pandit (3):
  net: tulip: check frame size and r/w data length
  net: tulip: add .can_receive routine
  net: tulip: flush queued packets post receive

 hw/net/tulip.c | 51 +++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 42 insertions(+), 9 deletions(-)

--
2.25.1
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by Jason Wang 5 years, 10 months ago 
On 2020/3/20 上午1:40, P J P wrote:
> From: Prasad J Pandit <pjp@fedoraproject.org>
>
> Hello,
>
> * This series adds checks to avoid potential OOB access and infinite loop
>    issues while processing rx/tx data.
>
> * Tulip tx descriptors are capped at 128 to avoid infinite loop in
>    tulip_xmit_list_update(), wrt Tulip kernel driver
>    -> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/dec/tulip/tulip.h#n319
>
> * Update v3: add .can_receive routine
>    -> https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg06275.html
>
> * Update v4: flush queued packets once they are received
>    -> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg05868.html
>
> * Update v5: fixed a typo in patch commit message
>    -> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg06209.html
>
> Thank you.


Looks good to me.

Qiang, any change to give a test with your reproducer?

Thanks


> --
> Prasad J Pandit (3):
>    net: tulip: check frame size and r/w data length
>    net: tulip: add .can_receive routine
>    net: tulip: flush queued packets post receive
>
>   hw/net/tulip.c | 51 +++++++++++++++++++++++++++++++++++++++++---------
>   1 file changed, 42 insertions(+), 9 deletions(-)
>
> --
> 2.25.1
>
>
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by Jason Wang 5 years, 10 months ago 
On 2020/3/23 上午11:43, Jason Wang wrote:
>
> On 2020/3/20 上午1:40, P J P wrote:
>> From: Prasad J Pandit <pjp@fedoraproject.org>
>>
>> Hello,
>>
>> * This series adds checks to avoid potential OOB access and infinite 
>> loop
>>    issues while processing rx/tx data.
>>
>> * Tulip tx descriptors are capped at 128 to avoid infinite loop in
>>    tulip_xmit_list_update(), wrt Tulip kernel driver
>>    -> 
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/dec/tulip/tulip.h#n319
>>
>> * Update v3: add .can_receive routine
>>    -> 
>> https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg06275.html
>>
>> * Update v4: flush queued packets once they are received
>>    -> 
>> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg05868.html
>>
>> * Update v5: fixed a typo in patch commit message
>>    -> 
>> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg06209.html
>>
>> Thank you.
>
>
> Looks good to me.
>
> Qiang, any change to give a test with your reproducer?
>
> Thanks


Ok, I get this:

hw/net/tulip.c:305:20: error: initialization of ‘_Bool 
(*)(NetClientState *)’ {aka ‘_Bool (*)(struct NetClientState *)’} from 
incompatible pointer type ‘int (*)(NetClientState *)’ {aka ‘int 
(*)(struct NetClientState *)’} [-Werror=incompatible-pointer-types]
      .can_receive = tulip_can_receive,
                     ^~~~~~~~~~~~~~~~~

Prasad, please fix this and post a new version.

While at it, I prefer to squash patch 3 into patch 2 since patch 3 fixes 
the issue introduced by patch 2.

Thanks


>
>
>> -- 
>> Prasad J Pandit (3):
>>    net: tulip: check frame size and r/w data length
>>    net: tulip: add .can_receive routine
>>    net: tulip: flush queued packets post receive
>>
>>   hw/net/tulip.c | 51 +++++++++++++++++++++++++++++++++++++++++---------
>>   1 file changed, 42 insertions(+), 9 deletions(-)
>>
>> -- 
>> 2.25.1
>>
>>
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by P J P 5 years, 10 months ago 
+-- On Mon, 23 Mar 2020, Jason Wang wrote --+
| Prasad, please fix this and post a new version.
| 
| While at it, I prefer to squash patch 3 into patch 2 since patch 3 fixes the 
| issue introduced by patch 2.

Sent patch v6.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by P J P 5 years, 10 months ago 
+-- On Mon, 23 Mar 2020, Jason Wang wrote --+
| hw/net/tulip.c:305:20: error: initialization of ‘_Bool (*)(NetClientState *)’
| {aka ‘_Bool (*)(struct NetClientState *)’} from incompatible pointer type ‘int
| (*)(NetClientState *)’ {aka ‘int (*)(struct NetClientState *)’}
| [-Werror=incompatible-pointer-types]
|      .can_receive = tulip_can_receive,
|                     ^~~~~~~~~~~~~~~~~

Strange, I did not get it.

| Prasad, please fix this and post a new version.
| 
| While at it, I prefer to squash patch 3 into patch 2 since patch 3 fixes the
| issue introduced by patch 2.

Okay, sending your way shortly.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by P J P 5 years, 10 months ago 
+-- On Mon, 23 Mar 2020, P J P wrote --+
| +-- On Mon, 23 Mar 2020, Jason Wang wrote --+
| | hw/net/tulip.c:305:20: error: initialization of ‘_Bool (*)(NetClientState *)’
| | {aka ‘_Bool (*)(struct NetClientState *)’} from incompatible pointer type ‘int
| | (*)(NetClientState *)’ {aka ‘int (*)(struct NetClientState *)’}
| | [-Werror=incompatible-pointer-types]
| |      .can_receive = tulip_can_receive,
| |                     ^~~~~~~~~~~~~~~~~
| 
| Strange, I did not get it.

qemu/include/net.h:

  typedef int (NetCanReceive)(NetClientState *);

  typedef struct NetClientInfo {
    ...
    NetCanReceive *can_receive;
    ...
  }

@Jason,
  Looking at the definition above, 'NetCanReceive' is returning an 'int' type. 
When I change 'tulip_can_receive' to return a 'bool', I get the reverse error

hw/net/tulip.c:305:20: error: initialization of ‘int (*)(NetClientState *)’ {aka ‘int (*)(struct NetClientState *)’} from incompatible pointer type ‘_Bool (*)(NetClientState *)’ {aka ‘_Bool (*)(struct NetClientState *)’} 
[-Werror=incompatible-pointer-types]
  305 |     .can_receive = tulip_can_receive,
      |                    ^~~~~~~~~~~~~~~~~

Maybe because of a stagged local change in your tree? (to confirm)

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by Jason Wang 5 years, 10 months ago 
On 2020/3/23 下午1:40, P J P wrote:
> +-- On Mon, 23 Mar 2020, P J P wrote --+
> | +-- On Mon, 23 Mar 2020, Jason Wang wrote --+
> | | hw/net/tulip.c:305:20: error: initialization of ‘_Bool (*)(NetClientState *)’
> | | {aka ‘_Bool (*)(struct NetClientState *)’} from incompatible pointer type ‘int
> | | (*)(NetClientState *)’ {aka ‘int (*)(struct NetClientState *)’}
> | | [-Werror=incompatible-pointer-types]
> | |      .can_receive = tulip_can_receive,
> | |                     ^~~~~~~~~~~~~~~~~
> |
> | Strange, I did not get it.
>
> qemu/include/net.h:
>
>    typedef int (NetCanReceive)(NetClientState *);
>
>    typedef struct NetClientInfo {
>      ...
>      NetCanReceive *can_receive;
>      ...
>    }
>
> @Jason,
>    Looking at the definition above, 'NetCanReceive' is returning an 'int' type.
> When I change 'tulip_can_receive' to return a 'bool', I get the reverse error
>
> hw/net/tulip.c:305:20: error: initialization of ‘int (*)(NetClientState *)’ {aka ‘int (*)(struct NetClientState *)’} from incompatible pointer type ‘_Bool (*)(NetClientState *)’ {aka ‘_Bool (*)(struct NetClientState *)’}
> [-Werror=incompatible-pointer-types]
>    305 |     .can_receive = tulip_can_receive,
>        |                    ^~~~~~~~~~~~~~~~~
>
> Maybe because of a stagged local change in your tree? (to confirm)


Right, it's the conversion from int to bool done by Philippe :)

I will fix the conflict after Qiang tests it.

Thanks


>
> Thank you.
> --
> Prasad J Pandit / Red Hat Product Security Team
> 8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
Re: [PATCH v5 0/3] net: tulip: add checks to avoid OOB access
Posted by Li Qiang 5 years, 10 months ago 
Jason Wang <jasowang@redhat.com> 于2020年3月23日周一 上午11:44写道：

>
> On 2020/3/20 上午1:40, P J P wrote:
> > From: Prasad J Pandit <pjp@fedoraproject.org>
> >
> > Hello,
> >
> > * This series adds checks to avoid potential OOB access and infinite loop
> >    issues while processing rx/tx data.
> >
> > * Tulip tx descriptors are capped at 128 to avoid infinite loop in
> >    tulip_xmit_list_update(), wrt Tulip kernel driver
> >    ->
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/dec/tulip/tulip.h#n319
> >
> > * Update v3: add .can_receive routine
> >    ->
> https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg06275.html
> >
> > * Update v4: flush queued packets once they are received
> >    ->
> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg05868.html
> >
> > * Update v5: fixed a typo in patch commit message
> >    ->
> https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg06209.html
> >
> > Thank you.
>
>
> Looks good to me.
>
> Qiang, any change to give a test with your reproducer?
>
>
Hi Jason,
Sorry for missing discussing this thread as so busy these days/weeks.

I will try to test this patch asap.

Thanks,
Li Qiang



> Thanks
>
>
> > --
> > Prasad J Pandit (3):
> >    net: tulip: check frame size and r/w data length
> >    net: tulip: add .can_receive routine
> >    net: tulip: flush queued packets post receive
> >
> >   hw/net/tulip.c | 51 +++++++++++++++++++++++++++++++++++++++++---------
> >   1 file changed, 42 insertions(+), 9 deletions(-)
> >
> > --
> > 2.25.1
> >
> >
>
>
>

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