From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+2eb9121678bdb36e6d57@syzkaller.appspotmail.com>
Cc: andreyknvl@google.com, <gregkh@linuxfoundation.org>,
<linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>,
<rafael@kernel.org>, <syzkaller-bugs@googlegroups.com>
Subject: Re: general protection fault in __dev_printk
Date: Mon, 22 Apr 2019 12:07:19 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1904221206170.1384-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <000000000000b3f4390587207d78@google.com>
On Mon, 22 Apr 2019, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but build/boot failed:
Typo in the patch (missing comma). Let's try again.
Alan Stern
#syz test: https://github.com/google/kasan.git usb-fuzzer
--- a/drivers/usb/misc/yurex.c
+++ b/drivers/usb/misc/yurex.c
@@ -178,6 +178,10 @@ static void yurex_interrupt(struct urb *
}
exit:
+ if (!usb_get_intfdata(dev->interface)) {
+ dev_info(&dev->interface->dev, "%s unbound\n", __func__);
+ return;
+ }
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
if (retval) {
dev_err(&dev->interface->dev, "%s - usb_submit_urb failed: %d\n",
@@ -309,11 +313,15 @@ static void yurex_disconnect(struct usb_
dev = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
+ dev_info(&interface->dev, "%s\n", __func__);
/* give back our minor */
usb_deregister_dev(interface, &yurex_class);
/* prevent more I/O from starting */
+ dev_info(&interface->dev, "Before poison\n");
+ usb_poison_urb(dev->urb);
+ dev_info(&interface->dev, "After poison\n");
mutex_lock(&dev->io_mutex);
dev->interface = NULL;
mutex_unlock(&dev->io_mutex);
next prev parent reply other threads:[~2019-04-22 16:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-17 11:26 general protection fault in __dev_printk syzbot
2019-04-18 17:07 ` syzbot
2019-04-19 20:44 ` Alan Stern
2019-04-19 21:22 ` syzbot
2019-04-22 15:39 ` Alan Stern
2019-04-22 15:55 ` syzbot
2019-04-22 16:07 ` Alan Stern [this message]
2019-04-22 16:44 ` syzbot
2019-04-22 17:53 ` Alan Stern
2019-04-23 15:05 ` Andrey Konovalov
2019-04-23 15:28 ` Alan Stern
2019-04-23 16:06 ` syzbot
2019-04-23 16:46 ` Alan Stern
2019-04-23 17:24 ` syzbot
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