From: syzbot <syzbot+596b59aea1a9deaaab67@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Forwarded: [PATCH] usb: raw-gadget: fix UAF in raw_process_ep_io
Date: Fri, 25 Sep 2026 15:15:56 -0700 [thread overview]
Message-ID: <6ab6f29c.e548f532.1ca396.0029.GAE@google.com> (raw)
In-Reply-To: <6a6972a5.d9e86bb5.297b12.004f.GAE@google.com>
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Subject: [PATCH] usb: raw-gadget: fix UAF in raw_process_ep_io
Author: drifabdelmalekmohamedsaid@gmail.com
#syz test
diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
index 4febf8dac7ca..9c263950f609 100644
--- a/drivers/usb/gadget/legacy/raw_gadget.c
+++ b/drivers/usb/gadget/legacy/raw_gadget.c
@@ -327,9 +327,16 @@ static int gadget_bind(struct usb_gadget *gadget,
static void gadget_unbind(struct usb_gadget *gadget)
{
+ unsigned long flags;
struct raw_dev *dev = get_gadget_data(gadget);
set_gadget_data(gadget, NULL);
+
+ /*Avoid dangling pointer in case it remaining references*/
+ spin_lock_irqsave(&dev->lock, flags);
+ dev->gadget = NULL;
+ spin_unlock_irqrestore(&dev->lock, flags);
+
/* Matches kref_get() in gadget_bind(). */
kref_put(&dev->count, dev_free);
}
prev parent reply other threads:[~2026-09-25 22:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-29 3:25 [syzbot] [kernel?] KASAN: slab-use-after-free Read in raw_process_ep_io (2) syzbot
2026-08-08 18:00 ` syzbot
2026-09-25 22:15 ` syzbot [this message]
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