Re: [PATCH 5.15 085/484] media: dvb-usb: Fix unexpected infinite loop in dvb_usb_read_remote_control()

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On Thu, Aug 15, 2024 at 03:10:39PM +0100, Sean Young wrote:
> On Thu, Aug 15, 2024 at 03:19:03PM +0200, Greg Kroah-Hartman wrote:
> > 5.15-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
> > 
> > [ Upstream commit 2052138b7da52ad5ccaf74f736d00f39a1c9198c ]
> > 
> > Infinite log printing occurs during fuzz test:
> > 
> >   rc rc1: DViCO FusionHDTV DVB-T USB (LGZ201) as ...
> >   ...
> >   dvb-usb: schedule remote query interval to 100 msecs.
> >   dvb-usb: DViCO FusionHDTV DVB-T USB (LGZ201) successfully initialized ...
> >   dvb-usb: bulk message failed: -22 (1/0)
> >   dvb-usb: bulk message failed: -22 (1/0)
> >   dvb-usb: bulk message failed: -22 (1/0)
> >   ...
> >   dvb-usb: bulk message failed: -22 (1/0)
> > 
> > Looking into the codes, there is a loop in dvb_usb_read_remote_control(),
> > that is in rc_core_dvb_usb_remote_init() create a work that will call
> > dvb_usb_read_remote_control(), and this work will reschedule itself at
> > 'rc_interval' intervals to recursively call dvb_usb_read_remote_control(),
> > see following code snippet:
> 
> This commit causes problems and has been reverted upstream.
> 
> https://git.linuxtv.org/media_stage.git/commit/?h=fixes&id=0c84bde4f37ba27d50e4c70ecacd33fe4a57030d
> 
> Please don't apply.

When will that land in Linus's tree?  Currently this commit is already
in released 6.1, 6.6, and 6.10 kernels :(

thanks,

greg k-h




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