From: sashiko-bot@kernel.org
To: "Liu Junyuan" <2058432396@qq.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] usb: gadget: udc: handle NULL request in tracepoint
Date: Wed, 11 Nov 2026 06:36:53 +0000 [thread overview]
Message-ID: <sashiko-outbox-208453@kernel.org> (raw)
In-Reply-To: <tencent_08E401ED34EC47C550C71A0462C8161D5D05@qq.com>
> usb_ep_alloc_request() passes a NULL request to
> trace_usb_ep_alloc_request() when ep->ops->alloc_request() fails.
> The udc_log_req tracepoint assumes req is non-NULL and dereferences
> req->length, causing a NULL pointer dereference.
>
> Make the tracepoint handle req == NULL so allocation failures can still
> be recorded safely.
>
> Reported-by: syzbot+2a7ce560c30c4ca3bc22@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=2a7ce560c30c4ca3bc22
> Fixes: 5e42d710a108 ("usb: gadget: add tracepoints to the gadget API")
> Signed-off-by: Liu Junyuan <2058432396@qq.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/tencent_08E401ED34EC47C550C71A0462C8161D5D05@qq.com?part=1
next prev parent reply other threads:[~2026-11-11 6:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 6:28 [PATCH] usb: gadget: udc: handle NULL request in tracepoint Liu Junyuan
2026-11-11 6:36 ` sashiko-bot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-11-11 4:50 LiuJunyuan
2026-11-11 5:05 ` sashiko-bot
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