[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 79.257462][ T32] audit: type=1800 audit(1570288237.303:25): pid=11737 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 79.280856][ T32] audit: type=1800 audit(1570288237.323:26): pid=11737 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 79.312193][ T32] audit: type=1800 audit(1570288237.353:27): pid=11737 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.242212][ T3844] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 91.482193][ T3844] usb 1-1: Using ep0 maxpacket: 8 [ 91.602308][ T3844] usb 1-1: config 0 has an invalid interface number: 68 but max is 0 [ 91.610545][ T3844] usb 1-1: config 0 has no interface number 0 [ 91.692253][ T3844] usb 1-1: New USB device found, idVendor=0547, idProduct=0201, bcdDevice=4f.d5 [ 91.701321][ T3844] usb 1-1: New USB device strings: Mfr=0, Product=26, SerialNumber=0 [ 91.709496][ T3844] usb 1-1: Product: syz [ 91.714858][ T3844] usb 1-1: config 0 descriptor?? [ 91.754685][ T3844] dvb-usb: found a 'Nebula Electronics uDigiTV DVB-T USB2.0)' in warm state. [ 91.765794][ T3844] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 91.792516][ T3844] dvbdev: DVB: registering new adapter (Nebula Electronics uDigiTV DVB-T USB2.0)) [ 91.801811][ T3844] usb 1-1: media controller created [ 91.826122][ T3844] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 91.846657][ T3844] dvb-usb: bulk message failed: -22 (7/0) [ 91.852710][ T3844] mt352_read_register: readreg error (reg=127, ret==0) [ 91.859615][ T3844] dvb-usb: bulk message failed: -22 (7/0) [ 91.865450][ T3844] dvb-usb: no frontend was attached by 'Nebula Electronics uDigiTV DVB-T USB2.0)' [ 91.913154][ T3844] input: IR-receiver inside an USB DVB receiver as /devices/platform/dummy_hcd.0/usb1/1-1/input/input5 [ 91.925314][ T3844] dvb-usb: schedule remote query interval to 1000 msecs. [ 91.932636][ T3844] dvb-usb: Nebula Electronics uDigiTV DVB-T USB2.0) successfully initialized and connected. [ 91.942796][ T3844] dvb-usb: bulk message failed: -22 (7/0) [ 91.948515][ T3844] dvb-usb: bulk message failed: -22 (7/0) [ 92.972231][ T3844] dvb-usb: bulk message failed: -22 (7/-30591) [ 92.978554][ T3844] dvb-usb: bulk message failed: -22 (7/0) [ 92.984381][ T3844] ===================================================== [ 92.991376][ T3844] BUG: KMSAN: uninit-value in legacy_dvb_usb_read_remote_control+0x106/0x790 [ 93.000134][ T3844] CPU: 1 PID: 3844 Comm: kworker/1:2 Not tainted 5.3.0-rc7+ #0 [ 93.007654][ T3844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.017704][ T3844] Workqueue: events legacy_dvb_usb_read_remote_control [ 93.024527][ T3844] Call Trace: [ 93.027819][ T3844] dump_stack+0x191/0x1f0 [ 93.032134][ T3844] kmsan_report+0x13a/0x2b0 [ 93.036619][ T3844] __msan_warning+0x73/0xe0 [ 93.041105][ T3844] digitv_rc_query+0x76a/0x890 [ 93.045856][ T3844] ? digitv_identify_state+0x150/0x150 [ 93.051295][ T3844] legacy_dvb_usb_read_remote_control+0x106/0x790 [ 93.057693][ T3844] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 93.063567][ T3844] ? legacy_dvb_usb_setkeycode+0x7c0/0x7c0 [ 93.069357][ T3844] process_one_work+0x1572/0x1ef0 [ 93.074381][ T3844] worker_thread+0x111b/0x2460 [ 93.079138][ T3844] kthread+0x4b5/0x4f0 [ 93.083201][ T3844] ? process_one_work+0x1ef0/0x1ef0 [ 93.088381][ T3844] ? kthread_blkcg+0xf0/0xf0 [ 93.092953][ T3844] ret_from_fork+0x35/0x40 [ 93.097381][ T3844] [ 93.099685][ T3844] Local variable description: ----key@digitv_rc_query [ 93.106503][ T3844] Variable was created at: [ 93.110895][ T3844] digitv_rc_query+0x78/0x890 [ 93.115557][ T3844] legacy_dvb_usb_read_remote_control+0x106/0x790 [ 93.122012][ T3844] ===================================================== [ 93.128923][ T3844] Disabling lock debugging due to kernel taint [ 93.135052][ T3844] Kernel panic - not syncing: panic_on_warn set ... [ 93.141621][ T3844] CPU: 1 PID: 3844 Comm: kworker/1:2 Tainted: G B 5.3.0-rc7+ #0 [ 93.150525][ T3844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.162218][ T3844] Workqueue: events legacy_dvb_usb_read_remote_control [ 93.169055][ T3844] Call Trace: [ 93.172345][ T3844] dump_stack+0x191/0x1f0 [ 93.176673][ T3844] panic+0x3c9/0xc1e [ 93.180563][ T3844] kmsan_report+0x2a2/0x2b0 [ 93.185048][ T3844] __msan_warning+0x73/0xe0 [ 93.189558][ T3844] digitv_rc_query+0x76a/0x890 [ 93.194338][ T3844] ? digitv_identify_state+0x150/0x150 [ 93.199775][ T3844] legacy_dvb_usb_read_remote_control+0x106/0x790 [ 93.206184][ T3844] ? kmsan_get_shadow_origin_ptr+0x6e/0x4c0 [ 93.212070][ T3844] ? legacy_dvb_usb_setkeycode+0x7c0/0x7c0 [ 93.217888][ T3844] process_one_work+0x1572/0x1ef0 [ 93.222908][ T3844] worker_thread+0x111b/0x2460 [ 93.227672][ T3844] kthread+0x4b5/0x4f0 [ 93.231743][ T3844] ? process_one_work+0x1ef0/0x1ef0 [ 93.236926][ T3844] ? kthread_blkcg+0xf0/0xf0 [ 93.241500][ T3844] ret_from_fork+0x35/0x40 [ 93.247354][ T3844] Kernel Offset: disabled [ 93.251684][ T3844] Rebooting in 86400 seconds..