On Thu, Aug 01, 2024 at 07:21:25PM +0200, Stefan Lippers-Hollmann wrote: > Hi > > On 2024-08-01, Stefan Lippers-Hollmann wrote: > > On 2024-08-01, Stefan Lippers-Hollmann wrote: > > > On 2024-07-30, Greg Kroah-Hartman wrote: > > > > 6.10-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 patch, as part of v6.10.3-rc3 breaks my TeVii s480 dual DVB-S2 > > > card, reverting just this patch from v6.10-rc3 fixes the situation > > > again (a co-installed Microsoft Xbox One Digital TV DVB-T2 Tuner > > > keeps working). > > [...] > > > > Btw. I can also reproduce this (both breakage and 'fix' by reverting > > this patch) on a another x86_64 system that only has a single TeVii > > s480 dual DVB-S2 card (and no further v4l devices) installed. So I'm > > seeing this on both sandy-bridge and raptor-lake x86_64 systems. > > This issue is also present in current linux HEAD (as of this moment, > v6.11-rc1-63-g21b136cc63d2). > > A clean revert of this commit 2052138b7da52ad5ccaf74f736d00f39a1c9198c > "media: dvb-usb: Fix unexpected infinite loop in > dvb_usb_read_remote_control()" avoids the problem for v6.11~ as well. As this issue is in Linus's tree, please work to get it resolved there first and then we will gladly take the changes here. thanks, greg k-h
