From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+ded1794a717e3b235226@syzkaller.appspotmail.com>
Cc: andreyknvl@google.com, <linux-kernel@vger.kernel.org>,
<linux-usb@vger.kernel.org>, <syzkaller-bugs@googlegroups.com>
Subject: Re: KASAN: use-after-free Read in hidraw_ioctl
Date: Wed, 21 Aug 2019 12:19:45 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1908211218550.1816-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <00000000000027b5750590a087dc@google.com>
#syz test: https://github.com/google/kasan.git e96407b4
Index: usb-devel/drivers/hid/hidraw.c
===================================================================
--- usb-devel.orig/drivers/hid/hidraw.c
+++ usb-devel/drivers/hid/hidraw.c
@@ -370,7 +370,7 @@ static long hidraw_ioctl(struct file *fi
mutex_lock(&minors_lock);
dev = hidraw_table[minor];
- if (!dev) {
+ if (!dev || !dev->exist) {
ret = -ENODEV;
goto out;
}
next prev parent reply other threads:[~2019-08-21 16:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-23 12:48 KASAN: use-after-free Read in hidraw_ioctl syzbot
2019-08-21 12:54 ` Andrey Konovalov
2019-08-21 12:54 ` syzbot
2019-08-21 12:54 ` syzbot
2019-08-21 12:55 ` Andrey Konovalov
2019-08-21 13:27 ` syzbot
2019-08-21 14:10 ` Andrey Konovalov
2019-08-21 16:19 ` Alan Stern [this message]
2019-08-21 16:38 ` syzbot
2019-08-21 16:39 ` Andrey Konovalov
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