[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. syzkaller login: [ 118.080609][ T8482] IPVS: ftp: loaded support on port[0] = 21 [ 118.080617][ T8480] IPVS: ftp: loaded support on port[0] = 21 [ 118.089676][ T8479] IPVS: ftp: loaded support on port[0] = 21 [ 118.104460][ T8478] IPVS: ftp: loaded support on port[0] = 21 [ 118.110605][ T8481] IPVS: ftp: loaded support on port[0] = 21 [ 118.120022][ T8483] IPVS: ftp: loaded support on port[0] = 21 executing program [ 118.245465][ T8536] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) [ 118.252160][ T8536] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program executing program executing program [ 118.326077][ T8558] vhci_hcd: connection closed [ 118.327760][ T48] vhci_hcd: stop threads executing program [ 118.375676][ T48] vhci_hcd: release socket [ 118.380590][ T48] vhci_hcd: disconnect device [ 118.392956][ T8611] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) [ 118.395755][ T8612] vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) [ 118.399495][ T8611] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.406008][ T8612] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program executing program [ 118.428350][ T8613] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) [ 118.433502][ T8616] vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) [ 118.434894][ T8613] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.441384][ T8616] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.470200][ T8619] vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) executing program [ 118.476746][ T8619] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.481244][ T8622] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) [ 118.490720][ T8622] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.498830][ T8617] vhci_hcd: connection closed [ 118.502871][ T8624] vhci_hcd: connection closed [ 118.504055][ T8618] vhci_hcd: connection closed [ 118.513477][ T48] vhci_hcd: stop threads executing program [ 118.525020][ T8629] vhci_hcd vhci_hcd.0: port 0 already used [ 118.526077][ T48] vhci_hcd: release socket [ 118.535943][ T48] vhci_hcd: disconnect device [ 118.544858][ T48] vhci_hcd: stop threads [ 118.549125][ T48] vhci_hcd: release socket [ 118.554293][ T8625] vhci_hcd: connection closed [ 118.555008][ T48] vhci_hcd: disconnect device [ 118.558354][ T8633] vhci_hcd vhci_hcd.0: port 0 already used executing program executing program executing program executing program executing program [ 118.567157][ T8630] vhci_hcd: connection closed [ 118.579736][ T8637] vhci_hcd: connection closed [ 118.584561][ T48] vhci_hcd: stop threads [ 118.593493][ T48] vhci_hcd: release socket [ 118.610917][ T48] vhci_hcd: disconnect device [ 118.620598][ T48] vhci_hcd: stop threads executing program [ 118.626480][ T48] vhci_hcd: release socket [ 118.628797][ T8644] vhci_hcd vhci_hcd.0: port 0 already used [ 118.632037][ T48] vhci_hcd: disconnect device [ 118.639040][ T8647] vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) [ 118.648227][ T8647] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.657637][ T48] vhci_hcd: stop threads [ 118.661899][ T48] vhci_hcd: release socket [ 118.668610][ T48] vhci_hcd: disconnect device [ 118.676427][ T48] vhci_hcd: stop threads [ 118.681115][ T48] vhci_hcd: release socket [ 118.687507][ T48] vhci_hcd: disconnect device [ 118.688457][ T8650] vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) [ 118.692678][ T8646] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) [ 118.698729][ T8650] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.705221][ T8646] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.723584][ T8656] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) executing program [ 118.730098][ T8656] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.745286][ T8657] vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) [ 118.751825][ T8657] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.756980][ T8658] vhci_hcd: connection closed [ 118.765183][ T8643] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) executing program [ 118.776398][ T8643] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.784200][ T48] vhci_hcd: stop threads [ 118.788461][ T48] vhci_hcd: release socket [ 118.793056][ T48] vhci_hcd: disconnect device [ 118.802121][ T8654] vhci_hcd: connection closed [ 118.802191][ T8660] vhci_hcd: connection closed [ 118.802348][ T8652] vhci_hcd: connection closed [ 118.807587][ T48] vhci_hcd: stop threads [ 118.818741][ T8663] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) executing program executing program executing program [ 118.821456][ T48] vhci_hcd: release socket [ 118.827326][ T8663] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.851710][ T48] vhci_hcd: disconnect device [ 118.860002][ T48] vhci_hcd: stop threads [ 118.864581][ T48] vhci_hcd: release socket [ 118.870078][ T48] vhci_hcd: disconnect device [ 118.872750][ T8674] vhci_hcd vhci_hcd.0: port 0 already used executing program [ 118.876307][ T8665] vhci_hcd: connection closed [ 118.883991][ T8664] vhci_hcd: connection closed [ 118.884224][ T8669] vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) [ 118.899853][ T8669] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 118.907811][ T48] vhci_hcd: stop threads [ 118.912076][ T48] vhci_hcd: release socket [ 118.915843][ T8677] vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) [ 118.923021][ T8677] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program [ 118.933469][ T48] vhci_hcd: disconnect device [ 118.940314][ T48] vhci_hcd: stop threads [ 118.941526][ T8678] vhci_hcd: connection closed [ 118.944958][ T48] vhci_hcd: release socket [ 118.948337][ T8673] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) [ 118.949890][ T48] vhci_hcd: disconnect device [ 118.954064][ T8673] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program executing program executing program [ 118.978270][ T8671] vhci_hcd: connection closed [ 118.981475][ T8681] vhci_hcd vhci_hcd.0: port 0 already used [ 118.993435][ T48] vhci_hcd: stop threads [ 119.003871][ T8684] vhci_hcd: connection closed [ 119.004591][ T48] vhci_hcd: release socket [ 119.016147][ T8683] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) [ 119.022672][ T8683] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program executing program executing program [ 119.040736][ T8691] vhci_hcd vhci_hcd.0: port 0 already used [ 119.047127][ T8689] vhci_hcd vhci_hcd.0: port 0 already used [ 119.053081][ T48] vhci_hcd: disconnect device [ 119.068850][ T48] vhci_hcd: stop threads [ 119.070257][ T8695] vhci_hcd vhci_hcd.0: port 0 already used [ 119.073124][ T48] vhci_hcd: release socket [ 119.073198][ T48] vhci_hcd: disconnect device executing program executing program [ 119.073456][ T48] vhci_hcd: stop threads [ 119.098148][ T8693] vhci_hcd vhci_hcd.0: port 0 already used [ 119.101149][ T8692] vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) [ 119.110486][ T8692] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.127306][ T48] vhci_hcd: release socket [ 119.131891][ T8699] vhci_hcd vhci_hcd.0: port 0 already used executing program [ 119.138569][ T48] vhci_hcd: disconnect device [ 119.145574][ T48] vhci_hcd: stop threads [ 119.150078][ T48] vhci_hcd: release socket [ 119.156222][ T48] vhci_hcd: disconnect device [ 119.168620][ T8697] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) [ 119.175162][ T8697] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program executing program [ 119.191066][ T8707] vhci_hcd vhci_hcd.0: port 0 already used [ 119.201203][ T8709] vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) [ 119.203559][ T8704] vhci_hcd: connection closed [ 119.207836][ T8709] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.215768][ T8708] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) [ 119.226617][ T8708] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.234564][ T48] vhci_hcd: stop threads executing program executing program executing program [ 119.239189][ T48] vhci_hcd: release socket [ 119.250767][ T8712] vhci_hcd vhci_hcd.0: port 0 already used [ 119.253514][ T48] vhci_hcd: disconnect device [ 119.279076][ T8713] vhci_hcd vhci_hcd.0: port 0 already used executing program executing program [ 119.288067][ T8715] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) [ 119.294598][ T8715] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.304760][ T8720] vhci_hcd: connection closed [ 119.305647][ T48] vhci_hcd: stop threads [ 119.320303][ T48] vhci_hcd: release socket [ 119.328879][ T8724] vhci_hcd vhci_hcd.0: port 0 already used [ 119.328899][ T48] vhci_hcd: disconnect device executing program [ 119.345585][ T8716] vhci_hcd: connection closed [ 119.345836][ T8718] vhci_hcd: connection closed [ 119.351768][ T48] vhci_hcd: stop threads [ 119.359706][ T8729] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) [ 119.363874][ T8726] vhci_hcd: connection closed [ 119.367455][ T8729] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.368160][ T8725] vhci_hcd vhci_hcd.0: port 0 already used executing program [ 119.393716][ T48] vhci_hcd: release socket [ 119.400519][ T48] vhci_hcd: disconnect device [ 119.407619][ T48] vhci_hcd: stop threads [ 119.416790][ T48] vhci_hcd: release socket [ 119.422903][ T8730] vhci_hcd: connection closed [ 119.427083][ T8733] vhci_hcd: connection closed [ 119.430104][ T48] vhci_hcd: disconnect device executing program executing program executing program executing program [ 119.444714][ T46] usb 19-1: new low-speed USB device number 2 using vhci_hcd [ 119.451290][ T48] vhci_hcd: stop threads [ 119.457569][ T8701] vhci_hcd: sendmsg failed!, ret=-32 for 48 [ 119.458859][ T48] vhci_hcd: release socket [ 119.467925][ T8743] vhci_hcd vhci_hcd.0: port 0 already used [ 119.478289][ T8738] vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) [ 119.484834][ T8738] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) executing program [ 119.499429][ T8741] vhci_hcd vhci_hcd.0: port 0 already used [ 119.505889][ T8742] vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) [ 119.512411][ T8742] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.529354][ T8747] vhci_hcd vhci_hcd.0: port 0 already used [ 119.533747][ T48] vhci_hcd: disconnect device executing program [ 119.548251][ T48] vhci_hcd: stop threads [ 119.552868][ T48] vhci_hcd: release socket [ 119.557674][ T8749] vhci_hcd: connection closed [ 119.560083][ T48] vhci_hcd: disconnect device [ 119.560227][ T8745] vhci_hcd vhci_hcd.0: port 0 already used [ 119.570934][ T48] vhci_hcd: stop threads [ 119.585453][ T48] vhci_hcd: release socket [ 119.594601][ T48] vhci_hcd: disconnect device [ 119.599474][ T48] ================================================================== [ 119.607714][ T48] BUG: KASAN: null-ptr-deref in kthread_stop+0x90/0x720 [ 119.614658][ T48] Write of size 4 at addr 000000000000001c by task kworker/u4:2/48 [ 119.622547][ T48] [ 119.623240][ T8759] vhci_hcd vhci_hcd.0: port 0 already used [ 119.624883][ T48] CPU: 1 PID: 48 Comm: kworker/u4:2 Not tainted 5.10.0-rc7-syzkaller #0 [ 119.624906][ T48] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.624926][ T48] Workqueue: usbip_event event_handler [ 119.624940][ T48] Call Trace: [ 119.624962][ T48] dump_stack+0x107/0x163 [ 119.624982][ T48] ? kthread_stop+0x90/0x720 [ 119.624997][ T48] ? kthread_stop+0x90/0x720 [ 119.625011][ T48] kasan_report.cold+0x5/0x37 [ 119.625029][ T48] ? kthread_stop+0x90/0x720 [ 119.625059][ T48] check_memory_region+0x13d/0x180 [ 119.656658][ T8753] vhci_hcd: connection closed [ 119.657951][ T48] kthread_stop+0x90/0x720 executing program executing program executing program [ 119.657976][ T48] vhci_shutdown_connection+0x9d/0x340 [ 119.657992][ T48] ? event_handler+0x14c/0x4f0 [ 119.658018][ T48] ? kfree+0xdb/0x360 [ 119.669353][ T8761] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) [ 119.671527][ T48] event_handler+0x1f0/0x4f0 [ 119.676179][ T8761] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.680754][ T48] process_one_work+0x933/0x15a0 [ 119.712615][ T8764] vhci_hcd vhci_hcd.0: port 0 already used [ 119.716555][ T48] ? lock_release+0x710/0x710 [ 119.716573][ T48] ? pwq_dec_nr_in_flight+0x320/0x320 executing program executing program executing program [ 119.716597][ T48] ? rwlock_bug.part.0+0x90/0x90 [ 119.716630][ T48] ? _raw_spin_lock_irq+0x41/0x50 [ 119.716656][ T48] worker_thread+0x64c/0x1120 [ 119.716684][ T48] ? __kthread_parkme+0x13f/0x1e0 [ 119.716698][ T48] ? process_one_work+0x15a0/0x15a0 [ 119.716716][ T48] kthread+0x3b1/0x4a0 [ 119.716740][ T48] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 119.722316][ T8751] vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) [ 119.728777][ T48] ret_from_fork+0x1f/0x30 executing program [ 119.733694][ T8751] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.739489][ T48] ================================================================== [ 119.776040][ T8767] vhci_hcd vhci_hcd.0: port 0 already used [ 119.778334][ T48] Disabling lock debugging due to kernel taint [ 119.789703][ T8768] vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) [ 119.792327][ T8762] vhci_hcd: connection closed [ 119.795191][ T8768] vhci_hcd vhci_hcd.0: devid(0) speed(1) speed_str(low-speed) [ 119.800034][ T48] Kernel panic - not syncing: panic_on_warn set ... executing program executing program [ 119.832372][ T8771] vhci_hcd: connection closed [ 119.833942][ T48] CPU: 1 PID: 48 Comm: kworker/u4:2 Tainted: G B 5.10.0-rc7-syzkaller #0 [ 119.833950][ T48] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.833967][ T48] Workqueue: usbip_event event_handler [ 119.833976][ T48] Call Trace: [ 119.834003][ T48] dump_stack+0x107/0x163 [ 119.841945][ T8776] vhci_hcd vhci_hcd.0: port 0 already used [ 119.848045][ T48] ? kthread_associate_blkcg+0x6e0/0x700 [ 119.848059][ T48] panic+0x306/0x73d executing program [ 119.848072][ T48] ? __warn_printk+0xf3/0xf3 [ 119.848086][ T48] ? preempt_schedule_common+0x59/0xc0 [ 119.848098][ T48] ? kthread_stop+0x90/0x720 [ 119.848111][ T48] ? preempt_schedule_thunk+0x16/0x18 [ 119.848123][ T48] ? trace_hardirqs_on+0x51/0x1c0 [ 119.848144][ T48] ? kthread_stop+0x90/0x720 [ 119.878768][ T8779] vhci_hcd vhci_hcd.0: port 0 already used [ 119.881270][ T48] ? kthread_stop+0x90/0x720 [ 119.881285][ T48] end_report+0x58/0x5e [ 119.881298][ T48] kasan_report.cold+0xd/0x37 [ 119.881325][ T48] ? kthread_stop+0x90/0x720 [ 119.886062][ T8780] vhci_hcd vhci_hcd.0: port 0 already used [ 119.891435][ T48] check_memory_region+0x13d/0x180 [ 119.891451][ T48] kthread_stop+0x90/0x720 [ 119.891468][ T48] vhci_shutdown_connection+0x9d/0x340 [ 119.891488][ T48] ? event_handler+0x14c/0x4f0 [ 119.912326][ T8782] vhci_hcd vhci_hcd.0: port 0 already used [ 119.915551][ T48] ? kfree+0xdb/0x360 [ 119.915568][ T48] event_handler+0x1f0/0x4f0 [ 119.915581][ T48] process_one_work+0x933/0x15a0 [ 119.915594][ T48] ? lock_release+0x710/0x710 [ 119.915614][ T48] ? pwq_dec_nr_in_flight+0x320/0x320 [ 119.928755][ T7] usb 11-1: new low-speed USB device number 2 using vhci_hcd [ 119.930569][ T48] ? rwlock_bug.part.0+0x90/0x90 [ 119.930583][ T48] ? _raw_spin_lock_irq+0x41/0x50 [ 119.930604][ T48] worker_thread+0x64c/0x1120 [ 119.952437][ T8754] vhci_hcd: sendmsg failed!, ret=-32 for 48 [ 119.954342][ T48] ? __kthread_parkme+0x13f/0x1e0 [ 119.954355][ T48] ? process_one_work+0x15a0/0x15a0 [ 119.954367][ T48] kthread+0x3b1/0x4a0 [ 119.954381][ T48] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 119.954394][ T48] ret_from_fork+0x1f/0x30 [ 119.954856][ T48] Kernel Offset: disabled [ 120.065991][ T48] Rebooting in 86400 seconds..