* [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver
@ 2023-07-14 7:40 Zqiang
2023-07-14 21:43 ` Andrey Konovalov
0 siblings, 1 reply; 5+ messages in thread
From: Zqiang @ 2023-07-14 7:40 UTC (permalink / raw)
To: andreyknvl, gregkh; +Cc: linux-usb, linux-kernel, qiang.zhang1211
Currently, increasing raw_dev->count happens before invoke the
raw_queue_event(), if the raw_queue_event() return error, invoke
raw_release() will not trigger the dev_free() to be called.
[ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
[ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
[ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
[ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
[ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16
BUG: memory leak
[<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline]
[<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline]
[<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
[<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
[<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165
[<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline]
[<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
[<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
[<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline]
[<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline]
[<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline]
[<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
[<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
[<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292
This commit therefore invoke kref_get() under the condition that
raw_queue_event() return success.
Reported-by: syzbot+feb045d335c1fdde5bf7@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7
Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
---
drivers/usb/gadget/legacy/raw_gadget.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
index 2acece16b890..e549022642e5 100644
--- a/drivers/usb/gadget/legacy/raw_gadget.c
+++ b/drivers/usb/gadget/legacy/raw_gadget.c
@@ -310,13 +310,15 @@ static int gadget_bind(struct usb_gadget *gadget,
dev->eps_num = i;
spin_unlock_irqrestore(&dev->lock, flags);
- /* Matches kref_put() in gadget_unbind(). */
- kref_get(&dev->count);
-
ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL);
- if (ret < 0)
+ if (ret < 0) {
dev_err(&gadget->dev, "failed to queue event\n");
+ set_gadget_data(gadget, NULL);
+ return ret;
+ }
+ /* Matches kref_put() in gadget_unbind(). */
+ kref_get(&dev->count);
return ret;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver
2023-07-14 7:40 [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver Zqiang
@ 2023-07-14 21:43 ` Andrey Konovalov
2023-07-18 2:17 ` Z qiang
2023-07-21 5:56 ` Z qiang
0 siblings, 2 replies; 5+ messages in thread
From: Andrey Konovalov @ 2023-07-14 21:43 UTC (permalink / raw)
To: Zqiang, gregkh; +Cc: linux-usb, linux-kernel
On Fri, Jul 14, 2023 at 9:40 AM Zqiang <qiang.zhang1211@gmail.com> wrote:
>
> Currently, increasing raw_dev->count happens before invoke the
> raw_queue_event(), if the raw_queue_event() return error, invoke
> raw_release() will not trigger the dev_free() to be called.
>
> [ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
> [ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
> [ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
> [ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
> [ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16
>
> BUG: memory leak
>
> [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> [<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline]
> [<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline]
> [<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
> [<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
> [<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165
>
> [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> [<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline]
> [<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
> [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
> [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline]
>
> [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> [<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline]
> [<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline]
> [<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
> [<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
> [<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292
>
> This commit therefore invoke kref_get() under the condition that
> raw_queue_event() return success.
>
> Reported-by: syzbot+feb045d335c1fdde5bf7@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7
> Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
> ---
> drivers/usb/gadget/legacy/raw_gadget.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
> index 2acece16b890..e549022642e5 100644
> --- a/drivers/usb/gadget/legacy/raw_gadget.c
> +++ b/drivers/usb/gadget/legacy/raw_gadget.c
> @@ -310,13 +310,15 @@ static int gadget_bind(struct usb_gadget *gadget,
> dev->eps_num = i;
> spin_unlock_irqrestore(&dev->lock, flags);
>
> - /* Matches kref_put() in gadget_unbind(). */
> - kref_get(&dev->count);
> -
> ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL);
> - if (ret < 0)
> + if (ret < 0) {
> dev_err(&gadget->dev, "failed to queue event\n");
> + set_gadget_data(gadget, NULL);
> + return ret;
> + }
>
> + /* Matches kref_put() in gadget_unbind(). */
> + kref_get(&dev->count);
> return ret;
> }
>
> --
> 2.17.1
Indeed, if gadget_bind fails due to a raw_queue_event failure, the
core gadget code will never call gadget_unbind.
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver
2023-07-14 21:43 ` Andrey Konovalov
@ 2023-07-18 2:17 ` Z qiang
2023-07-21 5:56 ` Z qiang
1 sibling, 0 replies; 5+ messages in thread
From: Z qiang @ 2023-07-18 2:17 UTC (permalink / raw)
To: Andrey Konovalov; +Cc: gregkh, linux-usb, linux-kernel
>
> On Fri, Jul 14, 2023 at 9:40 AM Zqiang <qiang.zhang1211@gmail.com> wrote:
> >
> > Currently, increasing raw_dev->count happens before invoke the
> > raw_queue_event(), if the raw_queue_event() return error, invoke
> > raw_release() will not trigger the dev_free() to be called.
> >
> > [ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
> > [ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
> > [ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
> > [ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
> > [ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16
> >
> > BUG: memory leak
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline]
> > [<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
> > [<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
> > [<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
> > [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
> > [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline]
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline]
> > [<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
> > [<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
> > [<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292
> >
> > This commit therefore invoke kref_get() under the condition that
> > raw_queue_event() return success.
> >
> > Reported-by: syzbot+feb045d335c1fdde5bf7@syzkaller.appspotmail.com
> > Closes: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7
> > Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
> > ---
> > drivers/usb/gadget/legacy/raw_gadget.c | 10 ++++++----
> > 1 file changed, 6 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
> > index 2acece16b890..e549022642e5 100644
> > --- a/drivers/usb/gadget/legacy/raw_gadget.c
> > +++ b/drivers/usb/gadget/legacy/raw_gadget.c
> > @@ -310,13 +310,15 @@ static int gadget_bind(struct usb_gadget *gadget,
> > dev->eps_num = i;
> > spin_unlock_irqrestore(&dev->lock, flags);
> >
> > - /* Matches kref_put() in gadget_unbind(). */
> > - kref_get(&dev->count);
> > -
> > ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL);
> > - if (ret < 0)
> > + if (ret < 0) {
> > dev_err(&gadget->dev, "failed to queue event\n");
> > + set_gadget_data(gadget, NULL);
> > + return ret;
> > + }
> >
> > + /* Matches kref_put() in gadget_unbind(). */
> > + kref_get(&dev->count);
> > return ret;
> > }
> >
> > --
> > 2.17.1
>
> Indeed, if gadget_bind fails due to a raw_queue_event failure, the
> core gadget code will never call gadget_unbind.
>
>
> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
> Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
Thanks for review and test !
>
> Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver
2023-07-14 21:43 ` Andrey Konovalov
2023-07-18 2:17 ` Z qiang
@ 2023-07-21 5:56 ` Z qiang
2023-07-21 6:03 ` Greg KH
1 sibling, 1 reply; 5+ messages in thread
From: Z qiang @ 2023-07-21 5:56 UTC (permalink / raw)
To: Andrey Konovalov, gregkh; +Cc: linux-usb, linux-kernel
>
> On Fri, Jul 14, 2023 at 9:40 AM Zqiang <qiang.zhang1211@gmail.com> wrote:
> >
> > Currently, increasing raw_dev->count happens before invoke the
> > raw_queue_event(), if the raw_queue_event() return error, invoke
> > raw_release() will not trigger the dev_free() to be called.
> >
> > [ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
> > [ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
> > [ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
> > [ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
> > [ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16
> >
> > BUG: memory leak
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline]
> > [<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
> > [<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
> > [<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
> > [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
> > [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline]
> >
> > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > [<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline]
> > [<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline]
> > [<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
> > [<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
> > [<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292
> >
> > This commit therefore invoke kref_get() under the condition that
> > raw_queue_event() return success.
> >
> > Reported-by: syzbot+feb045d335c1fdde5bf7@syzkaller.appspotmail.com
> > Closes: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7
> > Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
> > ---
> > drivers/usb/gadget/legacy/raw_gadget.c | 10 ++++++----
> > 1 file changed, 6 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
> > index 2acece16b890..e549022642e5 100644
> > --- a/drivers/usb/gadget/legacy/raw_gadget.c
> > +++ b/drivers/usb/gadget/legacy/raw_gadget.c
> > @@ -310,13 +310,15 @@ static int gadget_bind(struct usb_gadget *gadget,
> > dev->eps_num = i;
> > spin_unlock_irqrestore(&dev->lock, flags);
> >
> > - /* Matches kref_put() in gadget_unbind(). */
> > - kref_get(&dev->count);
> > -
> > ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL);
> > - if (ret < 0)
> > + if (ret < 0) {
> > dev_err(&gadget->dev, "failed to queue event\n");
> > + set_gadget_data(gadget, NULL);
> > + return ret;
> > + }
> >
> > + /* Matches kref_put() in gadget_unbind(). */
> > + kref_get(&dev->count);
> > return ret;
> > }
> >
> > --
> > 2.17.1
>
> Indeed, if gadget_bind fails due to a raw_queue_event failure, the
> core gadget code will never call gadget_unbind.
>
> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
> Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
>
Hi Greg
Friendly ping :)
Thanks
Zqiang
> Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver
2023-07-21 5:56 ` Z qiang
@ 2023-07-21 6:03 ` Greg KH
0 siblings, 0 replies; 5+ messages in thread
From: Greg KH @ 2023-07-21 6:03 UTC (permalink / raw)
To: Z qiang; +Cc: Andrey Konovalov, linux-usb, linux-kernel
On Fri, Jul 21, 2023 at 01:56:35PM +0800, Z qiang wrote:
> >
> > On Fri, Jul 14, 2023 at 9:40 AM Zqiang <qiang.zhang1211@gmail.com> wrote:
> > >
> > > Currently, increasing raw_dev->count happens before invoke the
> > > raw_queue_event(), if the raw_queue_event() return error, invoke
> > > raw_release() will not trigger the dev_free() to be called.
> > >
> > > [ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
> > > [ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
> > > [ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
> > > [ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
> > > [ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16
> > >
> > > BUG: memory leak
> > >
> > > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > > [<ffffffff8347eb55>] kmalloc include/linux/slab.h:582 [inline]
> > > [<ffffffff8347eb55>] kzalloc include/linux/slab.h:703 [inline]
> > > [<ffffffff8347eb55>] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
> > > [<ffffffff8347eb55>] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
> > > [<ffffffff827d1d09>] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165
> > >
> > > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > > [<ffffffff8347cd2f>] kmalloc include/linux/slab.h:582 [inline]
> > > [<ffffffff8347cd2f>] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
> > > [<ffffffff8347dfe9>] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
> > > [<ffffffff81685173>] vfs_ioctl fs/ioctl.c:51 [inline]
> > >
> > > [<ffffffff8154bf94>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
> > > [<ffffffff833ecc6a>] kmalloc include/linux/slab.h:582 [inline]
> > > [<ffffffff833ecc6a>] kzalloc include/linux/slab.h:703 [inline]
> > > [<ffffffff833ecc6a>] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
> > > [<ffffffff833e9132>] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
> > > [<ffffffff8347f13d>] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292
> > >
> > > This commit therefore invoke kref_get() under the condition that
> > > raw_queue_event() return success.
> > >
> > > Reported-by: syzbot+feb045d335c1fdde5bf7@syzkaller.appspotmail.com
> > > Closes: https://syzkaller.appspot.com/bug?extid=feb045d335c1fdde5bf7
> > > Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
> > > ---
> > > drivers/usb/gadget/legacy/raw_gadget.c | 10 ++++++----
> > > 1 file changed, 6 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
> > > index 2acece16b890..e549022642e5 100644
> > > --- a/drivers/usb/gadget/legacy/raw_gadget.c
> > > +++ b/drivers/usb/gadget/legacy/raw_gadget.c
> > > @@ -310,13 +310,15 @@ static int gadget_bind(struct usb_gadget *gadget,
> > > dev->eps_num = i;
> > > spin_unlock_irqrestore(&dev->lock, flags);
> > >
> > > - /* Matches kref_put() in gadget_unbind(). */
> > > - kref_get(&dev->count);
> > > -
> > > ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL);
> > > - if (ret < 0)
> > > + if (ret < 0) {
> > > dev_err(&gadget->dev, "failed to queue event\n");
> > > + set_gadget_data(gadget, NULL);
> > > + return ret;
> > > + }
> > >
> > > + /* Matches kref_put() in gadget_unbind(). */
> > > + kref_get(&dev->count);
> > > return ret;
> > > }
> > >
> > > --
> > > 2.17.1
> >
> > Indeed, if gadget_bind fails due to a raw_queue_event failure, the
> > core gadget code will never call gadget_unbind.
> >
> > Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
> > Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
> >
>
> Hi Greg
>
> Friendly ping :)
$ mdfrm -c ~/mail/todo/
1685 messages in /home/gregkh/mail/todo/
For various reasons I am way behind in getting to review public patches
like these, sorry. Give me a chance to catch up, should be through them
all by the end of next week.
In the meantime, to help reduce my load, you can always help review
other patches that have been sent to the list for review.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-07-21 6:04 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-07-14 7:40 [PATCH] USB: gadget: Fix the memory leak in raw_gadget driver Zqiang
2023-07-14 21:43 ` Andrey Konovalov
2023-07-18 2:17 ` Z qiang
2023-07-21 5:56 ` Z qiang
2023-07-21 6:03 ` Greg KH
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