Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Thu, Oct 19, 2017 at 01:19:13PM +0200, Andrey Konovalov wrote:
> On Wed, Oct 4, 2017 at 4:40 PM, Greg Kroah-Hartman
>  wrote:
> > On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
> >> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> >> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> >> > > Hi!
> >> > >
> >> > > I've got the following report while fuzzing the kernel with syzkaller.
> >> > >
> >> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> >> > >
> >> > > There's no check on the connection_info->num_ports value when
> >> > > iterating over ports.
> >> > >
> >> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> >> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> >> > > ==
> >> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> >> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> >>
> >> Thanks for the report, Andrey.
> >>
> >> > Ah, nice catch, this bug is _old_, sorry about that.
> >> >
> >> > The patch below should resolve this.  It looks bigger than it really is,
> >> > as I'm just moving the error checking higher up in the function, and
> >> > loosing an indentation for when there is invalid data.
> >> >
> >> > Can you let me know if this solves the issue?
> >>
> >> And thanks for fixing this up, Greg. Will you send a proper patch that I
> >> can apply?
> >
> > Yes, let me redo it based on your comments, and will send it out
> > "correctly" in a few days.
> 
> Hi Greg,
> 
> I was going through the bugs I've reported, and it seems that you
> didn't mail the patch for this one. Reminding in case you've
> accidentally forgotten about it.

It's not forgotten, it's on my TODO list, sorry, been swamped with other
things these past few weeks.  Hope to get to it soon...

thanks,

greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Thu, Oct 19, 2017 at 01:19:13PM +0200, Andrey Konovalov wrote:
> On Wed, Oct 4, 2017 at 4:40 PM, Greg Kroah-Hartman
>  wrote:
> > On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
> >> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> >> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> >> > > Hi!
> >> > >
> >> > > I've got the following report while fuzzing the kernel with syzkaller.
> >> > >
> >> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> >> > >
> >> > > There's no check on the connection_info->num_ports value when
> >> > > iterating over ports.
> >> > >
> >> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> >> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> >> > > ==
> >> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> >> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> >>
> >> Thanks for the report, Andrey.
> >>
> >> > Ah, nice catch, this bug is _old_, sorry about that.
> >> >
> >> > The patch below should resolve this.  It looks bigger than it really is,
> >> > as I'm just moving the error checking higher up in the function, and
> >> > loosing an indentation for when there is invalid data.
> >> >
> >> > Can you let me know if this solves the issue?
> >>
> >> And thanks for fixing this up, Greg. Will you send a proper patch that I
> >> can apply?
> >
> > Yes, let me redo it based on your comments, and will send it out
> > "correctly" in a few days.
> 
> Hi Greg,
> 
> I was going through the bugs I've reported, and it seems that you
> didn't mail the patch for this one. Reminding in case you've
> accidentally forgotten about it.

It's not forgotten, it's on my TODO list, sorry, been swamped with other
things these past few weeks.  Hope to get to it soon...

thanks,

greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

On Wed, Oct 4, 2017 at 4:40 PM, Greg Kroah-Hartman
 wrote:
> On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
>> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
>> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
>> > > Hi!
>> > >
>> > > I've got the following report while fuzzing the kernel with syzkaller.
>> > >
>> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
>> > >
>> > > There's no check on the connection_info->num_ports value when
>> > > iterating over ports.
>> > >
>> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
>> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
>> > > ==
>> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
>> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
>>
>> Thanks for the report, Andrey.
>>
>> > Ah, nice catch, this bug is _old_, sorry about that.
>> >
>> > The patch below should resolve this.  It looks bigger than it really is,
>> > as I'm just moving the error checking higher up in the function, and
>> > loosing an indentation for when there is invalid data.
>> >
>> > Can you let me know if this solves the issue?
>>
>> And thanks for fixing this up, Greg. Will you send a proper patch that I
>> can apply?
>
> Yes, let me redo it based on your comments, and will send it out
> "correctly" in a few days.

Hi Greg,

I was going through the bugs I've reported, and it seems that you
didn't mail the patch for this one. Reminding in case you've
accidentally forgotten about it.

Thanks!

>
> thanks for the review,
>
> greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

On Wed, Oct 4, 2017 at 4:40 PM, Greg Kroah-Hartman
 wrote:
> On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
>> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
>> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
>> > > Hi!
>> > >
>> > > I've got the following report while fuzzing the kernel with syzkaller.
>> > >
>> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
>> > >
>> > > There's no check on the connection_info->num_ports value when
>> > > iterating over ports.
>> > >
>> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
>> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
>> > > ==
>> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
>> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
>>
>> Thanks for the report, Andrey.
>>
>> > Ah, nice catch, this bug is _old_, sorry about that.
>> >
>> > The patch below should resolve this.  It looks bigger than it really is,
>> > as I'm just moving the error checking higher up in the function, and
>> > loosing an indentation for when there is invalid data.
>> >
>> > Can you let me know if this solves the issue?
>>
>> And thanks for fixing this up, Greg. Will you send a proper patch that I
>> can apply?
>
> Yes, let me redo it based on your comments, and will send it out
> "correctly" in a few days.

Hi Greg,

I was going through the bugs I've reported, and it seems that you
didn't mail the patch for this one. Reminding in case you've
accidentally forgotten about it.

Thanks!

>
> thanks for the review,
>
> greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> > > Hi!
> > > 
> > > I've got the following report while fuzzing the kernel with syzkaller.
> > > 
> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> > > 
> > > There's no check on the connection_info->num_ports value when
> > > iterating over ports.
> > > 
> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> > > ==
> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> 
> Thanks for the report, Andrey.
> 
> > Ah, nice catch, this bug is _old_, sorry about that.
> > 
> > The patch below should resolve this.  It looks bigger than it really is,
> > as I'm just moving the error checking higher up in the function, and
> > loosing an indentation for when there is invalid data.
> > 
> > Can you let me know if this solves the issue?
> 
> And thanks for fixing this up, Greg. Will you send a proper patch that I
> can apply?

Yes, let me redo it based on your comments, and will send it out
"correctly" in a few days.

thanks for the review,

greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Tue, Oct 03, 2017 at 11:29:40AM +0200, Johan Hovold wrote:
> On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> > On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> > > Hi!
> > > 
> > > I've got the following report while fuzzing the kernel with syzkaller.
> > > 
> > > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> > > 
> > > There's no check on the connection_info->num_ports value when
> > > iterating over ports.
> > > 
> > > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> > > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> > > ==
> > > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> > > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> 
> Thanks for the report, Andrey.
> 
> > Ah, nice catch, this bug is _old_, sorry about that.
> > 
> > The patch below should resolve this.  It looks bigger than it really is,
> > as I'm just moving the error checking higher up in the function, and
> > loosing an indentation for when there is invalid data.
> > 
> > Can you let me know if this solves the issue?
> 
> And thanks for fixing this up, Greg. Will you send a proper patch that I
> can apply?

Yes, let me redo it based on your comments, and will send it out
"correctly" in a few days.

thanks for the review,

greg k-h

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Johan Hovold]

On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> > Hi!
> > 
> > I've got the following report while fuzzing the kernel with syzkaller.
> > 
> > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> > 
> > There's no check on the connection_info->num_ports value when
> > iterating over ports.
> > 
> > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> > ==
> > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24

Thanks for the report, Andrey.

> Ah, nice catch, this bug is _old_, sorry about that.
> 
> The patch below should resolve this.  It looks bigger than it really is,
> as I'm just moving the error checking higher up in the function, and
> loosing an indentation for when there is invalid data.
> 
> Can you let me know if this solves the issue?

And thanks for fixing this up, Greg. Will you send a proper patch that I
can apply?

A couple of comments below.

> diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
> index 9f3317a940ef..18c31bae0e10 100644
> --- a/drivers/usb/serial/visor.c
> +++ b/drivers/usb/serial/visor.c
> @@ -338,47 +338,48 @@ static int palm_os_3_probe(struct usb_serial *serial,
>   goto exit;
>   }
>  
> - if (retval == sizeof(*connection_info)) {
> - connection_info = (struct visor_connection_info *)
> - transfer_buffer;
> -
> - num_ports = le16_to_cpu(connection_info->num_ports);
> - for (i = 0; i < num_ports; ++i) {
> - switch (
> -connection_info->connections[i].port_function_id) {
> - case VISOR_FUNCTION_GENERIC:
> - string = "Generic";
> - break;
> - case VISOR_FUNCTION_DEBUGGER:
> - string = "Debugger";
> - break;
> - case VISOR_FUNCTION_HOTSYNC:
> - string = "HotSync";
> - break;
> - case VISOR_FUNCTION_CONSOLE:
> - string = "Console";
> - break;
> - case VISOR_FUNCTION_REMOTE_FILE_SYS:
> - string = "Remote File System";
> - break;
> - default:
> - string = "unknown";
> - break;
> - }
> - dev_info(dev, "%s: port %d, is for %s use\n",
> - serial->type->description,
> - connection_info->connections[i].port, string);
> - }
> + if (retval != sizeof(*connection_info)) {
> + retval = -EINVAL;

Since we're refusing to bind here -ENODEV may be more appropriate. And
I think a dev_err() (or dev_warn()) is warranted too.

> + goto exit;

So far we have not been bailing probe when the returned connection-info size
wasn't the expected one (we'd only skip the dev_info() above). I'm sure
this is fine, but the tightened check could potentially cause issues if
there are devices returning additional fields.

>   }
> - /*
> - * Handle devices that report invalid stuff here.
> - */
> +
> + connection_info = (struct visor_connection_info *)transfer_buffer;
> +
> + num_ports = le16_to_cpu(connection_info->num_ports);
> +
> + /* Handle devices that report invalid stuff here. */
>   if (num_ports == 0 || num_ports > 2) {
>   dev_warn(dev, "%s: No valid connect info available\n",
>   serial->type->description);
>   num_ports = 2;
>   }
>  
> + for (i = 0; i < num_ports; ++i) {
> + switch (
> +connection_info->connections[i].port_function_id) {

Perhaps you can merge the above two lines now while at it.

> + case VISOR_FUNCTION_GENERIC:
> + string = "Generic";
> + break;
> + case VISOR_FUNCTION_DEBUGGER:
> + string = "Debugger";
> + break;
> + case VISOR_FUNCTION_HOTSYNC:
> + string = "HotSync";
> + break;
> + case VISOR_FUNCTION_CONSOLE:
> + string = "Console";
> + break;
> + case VISOR_FUNCTION_REMOTE_FILE_SYS:
> + string = "Remote File System";
> + break;
> + default:
> + string = "unknown";
> + break;
> + 

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Johan Hovold]

On Fri, Sep 29, 2017 at 10:37:55AM +0200, Greg Kroah-Hartman wrote:
> On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> > Hi!
> > 
> > I've got the following report while fuzzing the kernel with syzkaller.
> > 
> > On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> > 
> > There's no check on the connection_info->num_ports value when
> > iterating over ports.
> > 
> > usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> > usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> > ==
> > BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> > Read of size 1 at addr 8800686daa26 by task kworker/0:1/24

Thanks for the report, Andrey.

> Ah, nice catch, this bug is _old_, sorry about that.
> 
> The patch below should resolve this.  It looks bigger than it really is,
> as I'm just moving the error checking higher up in the function, and
> loosing an indentation for when there is invalid data.
> 
> Can you let me know if this solves the issue?

And thanks for fixing this up, Greg. Will you send a proper patch that I
can apply?

A couple of comments below.

> diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
> index 9f3317a940ef..18c31bae0e10 100644
> --- a/drivers/usb/serial/visor.c
> +++ b/drivers/usb/serial/visor.c
> @@ -338,47 +338,48 @@ static int palm_os_3_probe(struct usb_serial *serial,
>   goto exit;
>   }
>  
> - if (retval == sizeof(*connection_info)) {
> - connection_info = (struct visor_connection_info *)
> - transfer_buffer;
> -
> - num_ports = le16_to_cpu(connection_info->num_ports);
> - for (i = 0; i < num_ports; ++i) {
> - switch (
> -connection_info->connections[i].port_function_id) {
> - case VISOR_FUNCTION_GENERIC:
> - string = "Generic";
> - break;
> - case VISOR_FUNCTION_DEBUGGER:
> - string = "Debugger";
> - break;
> - case VISOR_FUNCTION_HOTSYNC:
> - string = "HotSync";
> - break;
> - case VISOR_FUNCTION_CONSOLE:
> - string = "Console";
> - break;
> - case VISOR_FUNCTION_REMOTE_FILE_SYS:
> - string = "Remote File System";
> - break;
> - default:
> - string = "unknown";
> - break;
> - }
> - dev_info(dev, "%s: port %d, is for %s use\n",
> - serial->type->description,
> - connection_info->connections[i].port, string);
> - }
> + if (retval != sizeof(*connection_info)) {
> + retval = -EINVAL;

Since we're refusing to bind here -ENODEV may be more appropriate. And
I think a dev_err() (or dev_warn()) is warranted too.

> + goto exit;

So far we have not been bailing probe when the returned connection-info size
wasn't the expected one (we'd only skip the dev_info() above). I'm sure
this is fine, but the tightened check could potentially cause issues if
there are devices returning additional fields.

>   }
> - /*
> - * Handle devices that report invalid stuff here.
> - */
> +
> + connection_info = (struct visor_connection_info *)transfer_buffer;
> +
> + num_ports = le16_to_cpu(connection_info->num_ports);
> +
> + /* Handle devices that report invalid stuff here. */
>   if (num_ports == 0 || num_ports > 2) {
>   dev_warn(dev, "%s: No valid connect info available\n",
>   serial->type->description);
>   num_ports = 2;
>   }
>  
> + for (i = 0; i < num_ports; ++i) {
> + switch (
> +connection_info->connections[i].port_function_id) {

Perhaps you can merge the above two lines now while at it.

> + case VISOR_FUNCTION_GENERIC:
> + string = "Generic";
> + break;
> + case VISOR_FUNCTION_DEBUGGER:
> + string = "Debugger";
> + break;
> + case VISOR_FUNCTION_HOTSYNC:
> + string = "HotSync";
> + break;
> + case VISOR_FUNCTION_CONSOLE:
> + string = "Console";
> + break;
> + case VISOR_FUNCTION_REMOTE_FILE_SYS:
> + string = "Remote File System";
> + break;
> + default:
> + string = "unknown";
> + break;
> + 

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

On Fri, Sep 29, 2017 at 10:37 AM, Greg Kroah-Hartman
 wrote:
> On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
>> Hi!
>>
>> I've got the following report while fuzzing the kernel with syzkaller.
>>
>> On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
>>
>> There's no check on the connection_info->num_ports value when
>> iterating over ports.
>>
>> usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
>> usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
>> ==
>> BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
>> Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
>>
>> CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 
>> #324
>> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
>> Workqueue: usb_hub_wq hub_event
>> Call Trace:
>>  __dump_stack lib/dump_stack.c:16
>>  dump_stack+0x292/0x395 lib/dump_stack.c:52
>>  print_address_description+0x78/0x280 mm/kasan/report.c:252
>>  kasan_report_error mm/kasan/report.c:351
>>  kasan_report+0x23d/0x350 mm/kasan/report.c:409
>>  __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
>>  palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
>>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>>  hub_port_connect drivers/usb/core/hub.c:4984
>>  hub_port_connect_change drivers/usb/core/hub.c:5090
>>  port_event drivers/usb/core/hub.c:5196
>>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>>  worker_thread+0x221/0x1850 kernel/workqueue.c:2253
>>  kthread+0x3a1/0x470 kernel/kthread.c:231
>>  ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
>>
>> Allocated by task 24:
>>  save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
>>  save_stack+0x43/0xd0 mm/kasan/kasan.c:447
>>  set_track mm/kasan/kasan.c:459
>>  kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
>>  kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
>>  kmalloc ./include/linux/slab.h:493
>>  palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
>>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>>  hub_port_connect drivers/usb/core/hub.c:4984
>>  hub_port_connect_change drivers/usb/core/hub.c:5090
>>  port_event drivers/usb/core/hub.c:5196
>>  

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

On Fri, Sep 29, 2017 at 10:37 AM, Greg Kroah-Hartman
 wrote:
> On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
>> Hi!
>>
>> I've got the following report while fuzzing the kernel with syzkaller.
>>
>> On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
>>
>> There's no check on the connection_info->num_ports value when
>> iterating over ports.
>>
>> usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
>> usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
>> ==
>> BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
>> Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
>>
>> CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 
>> #324
>> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
>> Workqueue: usb_hub_wq hub_event
>> Call Trace:
>>  __dump_stack lib/dump_stack.c:16
>>  dump_stack+0x292/0x395 lib/dump_stack.c:52
>>  print_address_description+0x78/0x280 mm/kasan/report.c:252
>>  kasan_report_error mm/kasan/report.c:351
>>  kasan_report+0x23d/0x350 mm/kasan/report.c:409
>>  __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
>>  palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
>>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>>  hub_port_connect drivers/usb/core/hub.c:4984
>>  hub_port_connect_change drivers/usb/core/hub.c:5090
>>  port_event drivers/usb/core/hub.c:5196
>>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>>  worker_thread+0x221/0x1850 kernel/workqueue.c:2253
>>  kthread+0x3a1/0x470 kernel/kthread.c:231
>>  ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
>>
>> Allocated by task 24:
>>  save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
>>  save_stack+0x43/0xd0 mm/kasan/kasan.c:447
>>  set_track mm/kasan/kasan.c:459
>>  kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
>>  kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
>>  kmalloc ./include/linux/slab.h:493
>>  palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
>>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>>  really_probe drivers/base/dd.c:413
>>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>>  hub_port_connect drivers/usb/core/hub.c:4984
>>  hub_port_connect_change drivers/usb/core/hub.c:5090
>>  port_event drivers/usb/core/hub.c:5196
>>  hub_event_impl+0x1971/0x3760 

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> Hi!
> 
> I've got the following report while fuzzing the kernel with syzkaller.
> 
> On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> 
> There's no check on the connection_info->num_ports value when
> iterating over ports.
> 
> usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> ==
> BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> 
> CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 
> #324
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
> Workqueue: usb_hub_wq hub_event
> Call Trace:
>  __dump_stack lib/dump_stack.c:16
>  dump_stack+0x292/0x395 lib/dump_stack.c:52
>  print_address_description+0x78/0x280 mm/kasan/report.c:252
>  kasan_report_error mm/kasan/report.c:351
>  kasan_report+0x23d/0x350 mm/kasan/report.c:409
>  __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
>  palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>  hub_port_connect drivers/usb/core/hub.c:4984
>  hub_port_connect_change drivers/usb/core/hub.c:5090
>  port_event drivers/usb/core/hub.c:5196
>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>  worker_thread+0x221/0x1850 kernel/workqueue.c:2253
>  kthread+0x3a1/0x470 kernel/kthread.c:231
>  ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
> 
> Allocated by task 24:
>  save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
>  save_stack+0x43/0xd0 mm/kasan/kasan.c:447
>  set_track mm/kasan/kasan.c:459
>  kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
>  kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
>  kmalloc ./include/linux/slab.h:493
>  palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>  hub_port_connect drivers/usb/core/hub.c:4984
>  hub_port_connect_change drivers/usb/core/hub.c:5090
>  port_event drivers/usb/core/hub.c:5196
>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>  worker_thread+0x221/0x1850 

Re: usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Greg Kroah-Hartman]

On Thu, Sep 28, 2017 at 07:57:46PM +0200, Andrey Konovalov wrote:
> Hi!
> 
> I've got the following report while fuzzing the kernel with syzkaller.
> 
> On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).
> 
> There's no check on the connection_info->num_ports value when
> iterating over ports.
> 
> usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
> usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
> ==
> BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
> Read of size 1 at addr 8800686daa26 by task kworker/0:1/24
> 
> CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 
> #324
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
> Workqueue: usb_hub_wq hub_event
> Call Trace:
>  __dump_stack lib/dump_stack.c:16
>  dump_stack+0x292/0x395 lib/dump_stack.c:52
>  print_address_description+0x78/0x280 mm/kasan/report.c:252
>  kasan_report_error mm/kasan/report.c:351
>  kasan_report+0x23d/0x350 mm/kasan/report.c:409
>  __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
>  palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>  hub_port_connect drivers/usb/core/hub.c:4984
>  hub_port_connect_change drivers/usb/core/hub.c:5090
>  port_event drivers/usb/core/hub.c:5196
>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>  worker_thread+0x221/0x1850 kernel/workqueue.c:2253
>  kthread+0x3a1/0x470 kernel/kthread.c:231
>  ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
> 
> Allocated by task 24:
>  save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
>  save_stack+0x43/0xd0 mm/kasan/kasan.c:447
>  set_track mm/kasan/kasan.c:459
>  kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
>  kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
>  kmalloc ./include/linux/slab.h:493
>  palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
>  visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
>  usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
>  usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
>  generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
>  usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
>  really_probe drivers/base/dd.c:413
>  driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
>  __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
>  bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
>  __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
>  device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
>  bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
>  device_add+0xd0b/0x1660 drivers/base/core.c:1835
>  usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
>  hub_port_connect drivers/usb/core/hub.c:4984
>  hub_port_connect_change drivers/usb/core/hub.c:5090
>  port_event drivers/usb/core/hub.c:5196
>  hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
>  hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
>  process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
>  worker_thread+0x221/0x1850 

usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

Hi!

I've got the following report while fuzzing the kernel with syzkaller.

On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).

There's no check on the connection_info->num_ports value when
iterating over ports.

usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
==
BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
Read of size 1 at addr 8800686daa26 by task kworker/0:1/24

CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 #324
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:16
 dump_stack+0x292/0x395 lib/dump_stack.c:52
 print_address_description+0x78/0x280 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351
 kasan_report+0x23d/0x350 mm/kasan/report.c:409
 __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
 palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
 visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
 usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
 hub_port_connect drivers/usb/core/hub.c:4984
 hub_port_connect_change drivers/usb/core/hub.c:5090
 port_event drivers/usb/core/hub.c:5196
 hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
 hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
 process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x3a1/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Allocated by task 24:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
 kmalloc ./include/linux/slab.h:493
 palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
 visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
 usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
 hub_port_connect drivers/usb/core/hub.c:4984
 hub_port_connect_change drivers/usb/core/hub.c:5090
 port_event drivers/usb/core/hub.c:5196
 hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
 hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
 process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x3a1/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Freed by task 2772:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track 

usb/serial/visor: slab-out-of-bounds in palm_os_3_probe

[Andrey Konovalov]

Hi!

I've got the following report while fuzzing the kernel with syzkaller.

On commit dc972a67cc54585bd83ad811c4e9b6ab3dcd427e (4.14-rc2+).

There's no check on the connection_info->num_ports value when
iterating over ports.

usb 1-1: Handspring Visor / Palm OS: port 162, is for unknown use
usb 1-1: Handspring Visor / Palm OS: port 81, is for unknown use
==
BUG: KASAN: slab-out-of-bounds in palm_os_3_probe+0x4e4/0x570
Read of size 1 at addr 8800686daa26 by task kworker/0:1/24

CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc2-42748-gcd3da2fe6c25 #324
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:16
 dump_stack+0x292/0x395 lib/dump_stack.c:52
 print_address_description+0x78/0x280 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351
 kasan_report+0x23d/0x350 mm/kasan/report.c:409
 __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427
 palm_os_3_probe+0x4e4/0x570 drivers/usb/serial/visor.c:348
 visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
 usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
 hub_port_connect drivers/usb/core/hub.c:4984
 hub_port_connect_change drivers/usb/core/hub.c:5090
 port_event drivers/usb/core/hub.c:5196
 hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
 hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
 process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x3a1/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Allocated by task 24:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x11e/0x2d0 mm/slub.c:2772
 kmalloc ./include/linux/slab.h:493
 palm_os_3_probe+0x7c/0x570 drivers/usb/serial/visor.c:325
 visor_probe+0x11c/0x1e0 drivers/usb/serial/visor.c:463
 usb_serial_probe+0x540/0x4090 drivers/usb/serial/usb-serial.c:903
 usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_set_configuration+0x104e/0x1870 drivers/usb/core/message.c:1932
 generic_probe+0x73/0xe0 drivers/usb/core/generic.c:174
 usb_probe_device+0xaf/0xe0 drivers/usb/core/driver.c:266
 really_probe drivers/base/dd.c:413
 driver_probe_device+0x610/0xa00 drivers/base/dd.c:557
 __device_attach_driver+0x230/0x290 drivers/base/dd.c:653
 bus_for_each_drv+0x161/0x210 drivers/base/bus.c:463
 __device_attach+0x26e/0x3d0 drivers/base/dd.c:710
 device_initial_probe+0x1f/0x30 drivers/base/dd.c:757
 bus_probe_device+0x1eb/0x290 drivers/base/bus.c:523
 device_add+0xd0b/0x1660 drivers/base/core.c:1835
 usb_new_device+0x7b8/0x1020 drivers/usb/core/hub.c:2538
 hub_port_connect drivers/usb/core/hub.c:4984
 hub_port_connect_change drivers/usb/core/hub.c:5090
 port_event drivers/usb/core/hub.c:5196
 hub_event_impl+0x1971/0x3760 drivers/usb/core/hub.c:5310
 hub_event+0x11b/0x3f0 drivers/usb/core/hub.c:5206
 process_one_work+0xc7f/0x1db0 kernel/workqueue.c:2119
 worker_thread+0x221/0x1850 kernel/workqueue.c:2253
 kthread+0x3a1/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

Freed by task 2772:
 save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track