* [Qemu-devel] [PATCH] Out off array access in usb-net
@ 2010-11-09 7:36 Gleb Natapov
2010-11-09 9:29 ` [Qemu-devel] " Paolo Bonzini
` (2 more replies)
0 siblings, 3 replies; 10+ messages in thread
From: Gleb Natapov @ 2010-11-09 7:36 UTC (permalink / raw)
To: qemu-devel
Properly check array bounds before accessing array element.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/hw/usb-net.c b/hw/usb-net.c
index 70f9263..84e2d79 100644
--- a/hw/usb-net.c
+++ b/hw/usb-net.c
@@ -1142,7 +1142,7 @@ static int usb_net_handle_control(USBDevice *dev, int request, int value,
break;
default:
- if (usb_net_stringtable[value & 0xff]) {
+ if (ARRAY_SIZE(usb_net_stringtable) > (value & 0xff)) {
ret = set_usb_string(data,
usb_net_stringtable[value & 0xff]);
break;
--
Gleb.
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [Qemu-devel] Re: [PATCH] Out off array access in usb-net
2010-11-09 7:36 [Qemu-devel] [PATCH] Out off array access in usb-net Gleb Natapov
@ 2010-11-09 9:29 ` Paolo Bonzini
2010-11-09 9:30 ` [Qemu-devel] " Markus Armbruster
2010-11-16 22:24 ` Anthony Liguori
2 siblings, 0 replies; 10+ messages in thread
From: Paolo Bonzini @ 2010-11-09 9:29 UTC (permalink / raw)
To: Gleb Natapov; +Cc: qemu-devel
On 11/09/2010 08:36 AM, Gleb Natapov wrote:
> Properly check array bounds before accessing array element.
>
> Signed-off-by: Gleb Natapov<gleb@redhat.com>
> diff --git a/hw/usb-net.c b/hw/usb-net.c
> index 70f9263..84e2d79 100644
> --- a/hw/usb-net.c
> +++ b/hw/usb-net.c
> @@ -1142,7 +1142,7 @@ static int usb_net_handle_control(USBDevice *dev, int request, int value,
> break;
>
> default:
> - if (usb_net_stringtable[value& 0xff]) {
> + if (ARRAY_SIZE(usb_net_stringtable)> (value& 0xff)) {
> ret = set_usb_string(data,
> usb_net_stringtable[value& 0xff]);
> break;
> --
> Gleb.
>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 7:36 [Qemu-devel] [PATCH] Out off array access in usb-net Gleb Natapov
2010-11-09 9:29 ` [Qemu-devel] " Paolo Bonzini
@ 2010-11-09 9:30 ` Markus Armbruster
2010-11-09 9:39 ` Gleb Natapov
2010-11-16 22:24 ` Anthony Liguori
2 siblings, 1 reply; 10+ messages in thread
From: Markus Armbruster @ 2010-11-09 9:30 UTC (permalink / raw)
To: Gleb Natapov; +Cc: qemu-devel
Gleb Natapov <gleb@redhat.com> writes:
> Properly check array bounds before accessing array element.
Impact?
Apply to stable as well?
> Signed-off-by: Gleb Natapov <gleb@redhat.com>
> diff --git a/hw/usb-net.c b/hw/usb-net.c
> index 70f9263..84e2d79 100644
> --- a/hw/usb-net.c
> +++ b/hw/usb-net.c
> @@ -1142,7 +1142,7 @@ static int usb_net_handle_control(USBDevice *dev, int request, int value,
> break;
>
> default:
> - if (usb_net_stringtable[value & 0xff]) {
> + if (ARRAY_SIZE(usb_net_stringtable) > (value & 0xff)) {
> ret = set_usb_string(data,
> usb_net_stringtable[value & 0xff]);
> break;
Makes sense.
Nitpick: LIMIT > INDEX looks unusual to me; INDEX < LIMIT is more
common.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 9:30 ` [Qemu-devel] " Markus Armbruster
@ 2010-11-09 9:39 ` Gleb Natapov
2010-11-09 10:16 ` Markus Armbruster
0 siblings, 1 reply; 10+ messages in thread
From: Gleb Natapov @ 2010-11-09 9:39 UTC (permalink / raw)
To: Markus Armbruster; +Cc: qemu-devel
On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
> Gleb Natapov <gleb@redhat.com> writes:
>
> > Properly check array bounds before accessing array element.
>
> Impact?
>
Gapping security hole for those unfortunate enough to use usb-net?
> Apply to stable as well?
>
Definitely. Actually for me Windows7 crashed when usb-net is present.
> > Signed-off-by: Gleb Natapov <gleb@redhat.com>
> > diff --git a/hw/usb-net.c b/hw/usb-net.c
> > index 70f9263..84e2d79 100644
> > --- a/hw/usb-net.c
> > +++ b/hw/usb-net.c
> > @@ -1142,7 +1142,7 @@ static int usb_net_handle_control(USBDevice *dev, int request, int value,
> > break;
> >
> > default:
> > - if (usb_net_stringtable[value & 0xff]) {
> > + if (ARRAY_SIZE(usb_net_stringtable) > (value & 0xff)) {
> > ret = set_usb_string(data,
> > usb_net_stringtable[value & 0xff]);
> > break;
>
> Makes sense.
>
> Nitpick: LIMIT > INDEX looks unusual to me; INDEX < LIMIT is more
> common.
--
Gleb.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 9:39 ` Gleb Natapov
@ 2010-11-09 10:16 ` Markus Armbruster
2010-11-09 10:34 ` Gleb Natapov
0 siblings, 1 reply; 10+ messages in thread
From: Markus Armbruster @ 2010-11-09 10:16 UTC (permalink / raw)
To: Gleb Natapov; +Cc: qemu-devel
Gleb Natapov <gleb@redhat.com> writes:
> On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
>> Gleb Natapov <gleb@redhat.com> writes:
>>
>> > Properly check array bounds before accessing array element.
>>
>> Impact?
>>
> Gapping security hole for those unfortunate enough to use usb-net?
Doesn't that bit of information belong in the commit message.
>> Apply to stable as well?
>>
> Definitely. Actually for me Windows7 crashed when usb-net is present.
And that as well.
Good catch!
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 10:16 ` Markus Armbruster
@ 2010-11-09 10:34 ` Gleb Natapov
2010-11-09 10:51 ` Markus Armbruster
0 siblings, 1 reply; 10+ messages in thread
From: Gleb Natapov @ 2010-11-09 10:34 UTC (permalink / raw)
To: Markus Armbruster; +Cc: qemu-devel
On Tue, Nov 09, 2010 at 11:16:43AM +0100, Markus Armbruster wrote:
> Gleb Natapov <gleb@redhat.com> writes:
>
> > On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
> >> Gleb Natapov <gleb@redhat.com> writes:
> >>
> >> > Properly check array bounds before accessing array element.
> >>
> >> Impact?
> >>
> > Gapping security hole for those unfortunate enough to use usb-net?
>
> Doesn't that bit of information belong in the commit message.
>
Some people prefer not to put such information into commit message.
> >> Apply to stable as well?
> >>
> > Definitely. Actually for me Windows7 crashed when usb-net is present.
>
> And that as well.
>
> Good catch!
--
Gleb.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 10:34 ` Gleb Natapov
@ 2010-11-09 10:51 ` Markus Armbruster
2010-11-16 20:08 ` Anthony Liguori
0 siblings, 1 reply; 10+ messages in thread
From: Markus Armbruster @ 2010-11-09 10:51 UTC (permalink / raw)
To: Gleb Natapov; +Cc: qemu-devel
Gleb Natapov <gleb@redhat.com> writes:
> On Tue, Nov 09, 2010 at 11:16:43AM +0100, Markus Armbruster wrote:
>> Gleb Natapov <gleb@redhat.com> writes:
>>
>> > On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
>> >> Gleb Natapov <gleb@redhat.com> writes:
>> >>
>> >> > Properly check array bounds before accessing array element.
>> >>
>> >> Impact?
>> >>
>> > Gapping security hole for those unfortunate enough to use usb-net?
>>
>> Doesn't that bit of information belong in the commit message.
>>
> Some people prefer not to put such information into commit message.
Correct, but does "some people" include the QEMU maintainers? Anthony?
[...]
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 10:51 ` Markus Armbruster
@ 2010-11-16 20:08 ` Anthony Liguori
2010-11-16 20:14 ` Gleb Natapov
0 siblings, 1 reply; 10+ messages in thread
From: Anthony Liguori @ 2010-11-16 20:08 UTC (permalink / raw)
To: Markus Armbruster; +Cc: qemu-devel, Gleb Natapov
On 11/09/2010 04:51 AM, Markus Armbruster wrote:
> Gleb Natapov<gleb@redhat.com> writes:
>
>
>> On Tue, Nov 09, 2010 at 11:16:43AM +0100, Markus Armbruster wrote:
>>
>>> Gleb Natapov<gleb@redhat.com> writes:
>>>
>>>
>>>> On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
>>>>
>>>>> Gleb Natapov<gleb@redhat.com> writes:
>>>>>
>>>>>
>>>>>> Properly check array bounds before accessing array element.
>>>>>>
>>>>> Impact?
>>>>>
>>>>>
>>>> Gapping security hole for those unfortunate enough to use usb-net?
>>>>
>>> Doesn't that bit of information belong in the commit message.
>>>
>>>
>> Some people prefer not to put such information into commit message.
>>
> Correct, but does "some people" include the QEMU maintainers? Anthony?
>
I don't have a strong opinion either way. If there's a CVE, I'd prefer
the CVE number was prominent in the commit log but other than that, I'd
leave it to the author's discretion.
Regards,
Anthony Liguori
> [...]
>
>
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-16 20:08 ` Anthony Liguori
@ 2010-11-16 20:14 ` Gleb Natapov
0 siblings, 0 replies; 10+ messages in thread
From: Gleb Natapov @ 2010-11-16 20:14 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Markus Armbruster, qemu-devel
On Tue, Nov 16, 2010 at 02:08:13PM -0600, Anthony Liguori wrote:
> On 11/09/2010 04:51 AM, Markus Armbruster wrote:
> >Gleb Natapov<gleb@redhat.com> writes:
> >
> >>On Tue, Nov 09, 2010 at 11:16:43AM +0100, Markus Armbruster wrote:
> >>>Gleb Natapov<gleb@redhat.com> writes:
> >>>
> >>>>On Tue, Nov 09, 2010 at 10:30:54AM +0100, Markus Armbruster wrote:
> >>>>>Gleb Natapov<gleb@redhat.com> writes:
> >>>>>
> >>>>>>Properly check array bounds before accessing array element.
> >>>>>Impact?
> >>>>>
> >>>>Gapping security hole for those unfortunate enough to use usb-net?
> >>>Doesn't that bit of information belong in the commit message.
> >>>
> >>Some people prefer not to put such information into commit message.
> >Correct, but does "some people" include the QEMU maintainers? Anthony?
>
> I don't have a strong opinion either way. If there's a CVE, I'd
> prefer the CVE number was prominent in the commit log but other than
> that, I'd leave it to the author's discretion.
>
No CVE. Please apply as is.
--
Gleb.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Qemu-devel] [PATCH] Out off array access in usb-net
2010-11-09 7:36 [Qemu-devel] [PATCH] Out off array access in usb-net Gleb Natapov
2010-11-09 9:29 ` [Qemu-devel] " Paolo Bonzini
2010-11-09 9:30 ` [Qemu-devel] " Markus Armbruster
@ 2010-11-16 22:24 ` Anthony Liguori
2 siblings, 0 replies; 10+ messages in thread
From: Anthony Liguori @ 2010-11-16 22:24 UTC (permalink / raw)
To: Gleb Natapov; +Cc: qemu-devel
On 11/09/2010 01:36 AM, Gleb Natapov wrote:
> Properly check array bounds before accessing array element.
>
> Signed-off-by: Gleb Natapov<gleb@redhat.com>
>
Applied. Thanks.
Regards,
Anthony Liguori
> diff --git a/hw/usb-net.c b/hw/usb-net.c
> index 70f9263..84e2d79 100644
> --- a/hw/usb-net.c
> +++ b/hw/usb-net.c
> @@ -1142,7 +1142,7 @@ static int usb_net_handle_control(USBDevice *dev, int request, int value,
> break;
>
> default:
> - if (usb_net_stringtable[value& 0xff]) {
> + if (ARRAY_SIZE(usb_net_stringtable)> (value& 0xff)) {
> ret = set_usb_string(data,
> usb_net_stringtable[value& 0xff]);
> break;
> --
> Gleb.
>
>
>
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2010-11-16 22:24 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
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2010-11-09 7:36 [Qemu-devel] [PATCH] Out off array access in usb-net Gleb Natapov
2010-11-09 9:29 ` [Qemu-devel] " Paolo Bonzini
2010-11-09 9:30 ` [Qemu-devel] " Markus Armbruster
2010-11-09 9:39 ` Gleb Natapov
2010-11-09 10:16 ` Markus Armbruster
2010-11-09 10:34 ` Gleb Natapov
2010-11-09 10:51 ` Markus Armbruster
2010-11-16 20:08 ` Anthony Liguori
2010-11-16 20:14 ` Gleb Natapov
2010-11-16 22:24 ` Anthony Liguori
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