All of lore.kernel.org
 help / color / mirror / Atom feed
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Yu Zhang <yuz08559@gmail.com>
Cc: Mike Christie <michael.christie@oracle.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-usb@vger.kernel.org, target-devel@vger.kernel.org,
	linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [BUG] usb: gadget: f_tcm: NULL-ptr-deref / use-after-free when the UDC is disconnected during in-flight target I/O
Date: Tue, 20 Oct 2026 08:04:47 +0200	[thread overview]
Message-ID: <2026102035-unsure-garland-2281@gregkh> (raw)
In-Reply-To: <20261020052629.92551-1-yuz08559@gmail.com>

On Tue, Oct 20, 2026 at 03:26:29PM +1000, Yu Zhang wrote:
> Hi,
> 
> f_tcm frees its per-endpoint USB requests on the teardown path without
> waiting for in-flight target_core commands to finish, so a command that
> is still being processed by the backend when the gadget is disconnected
> completes into freed/NULL request memory.

Great, can you submit a patch for this?

thanks,

greg k-h

      reply	other threads:[~2026-10-20  6:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-20  5:26 [BUG] usb: gadget: f_tcm: NULL-ptr-deref / use-after-free when the UDC is disconnected during in-flight target I/O Yu Zhang
2026-10-20  6:04 ` Greg Kroah-Hartman [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=2026102035-unsure-garland-2281@gregkh \
    --to=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    --cc=michael.christie@oracle.com \
    --cc=target-devel@vger.kernel.org \
    --cc=yuz08559@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.