linux-kernel - Re: [PATCH 3/3] usb: mtu3: fix list

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Date:   Fri, 10 Dec 2021 09:19:05 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Sergey Shtylyov <s.shtylyov@....ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Eddie Hung <eddie.hung@...iatek.com>,
        "Yuwen Ng" <yuwen.ng@...iatek.com>
Subject: Re: [PATCH 3/3] usb: mtu3: fix list_head check warning

On Thu, 2021-12-09 at 12:10 +0300, Sergey Shtylyov wrote:
> Hello!
> 
> On 09.12.2021 6:14, Chunfeng Yun wrote:
> 
> > This is caused by uninitialization of list_head.
> 
>     No such word, suggesting to replace with "not initializing". :-)
Will fix it, thanks

> 
> > BUG: KASAN: use-after-free in __list_del_entry_valid+0x34/0xe4
> > 
> > Call trace:
> > dump_backtrace+0x0/0x298
> > show_stack+0x24/0x34
> > dump_stack+0x130/0x1a8
> > print_address_description+0x88/0x56c
> > __kasan_report+0x1b8/0x2a0
> > kasan_report+0x14/0x20
> > __asan_load8+0x9c/0xa0
> > __list_del_entry_valid+0x34/0xe4
> > mtu3_req_complete+0x4c/0x300 [mtu3]
> > mtu3_gadget_stop+0x168/0x448 [mtu3]
> > usb_gadget_unregister_driver+0x204/0x3a0
> > unregister_gadget_item+0x44/0xa4
> > 
> > Reported-by: Yuwen Ng <yuwen.ng@...iatek.com>
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> 
> [...]
> 
> MBR, Sergey