[ OK ] Started System Logging Service. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.52' (ECDSA) to the list of known hosts. syzkaller login: [ 141.321027][ T8488] IPVS: ftp: loaded support on port[0] = 21 executing program [ 141.713038][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 141.953094][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 142.073275][ T12] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0xB has invalid wMaxPacketSize 0 [ 142.083243][ T12] usb 1-1: config 1 interface 0 altsetting 0 bulk endpoint 0xB has invalid maxpacket 0 [ 142.093212][ T12] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x8A has invalid wMaxPacketSize 0 [ 142.103305][ T12] usb 1-1: config 1 interface 0 altsetting 0 bulk endpoint 0x8A has invalid maxpacket 0 [ 142.113315][ T12] usb 1-1: New USB device found, idVendor=04e6, idProduct=0003, bcdDevice=74.ec [ 142.122482][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 142.175961][ T12] ums-sddr09 1-1:1.0: USB Mass Storage device detected [ 142.384541][ T12] scsi host1: usb-storage 1-1:1.0 [ 143.313171][ T12] Bluetooth: hci0: command 0x0409 tx timeout [ 143.394576][ T989] scsi 1:0:0:0: Direct-Access Sandisk ImageMate SDDR09 74>< PQ: 0 ANSI: 0 [ 143.413279][ T989] sd 1:0:0:0: Attached scsi generic sg1 type 0 [ 143.653347][ T3372] usb 1-1: USB disconnect, device number 2 [ 143.674624][ T8527] sddr09: could not read card info [ 143.680356][ T624] sd 1:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B) [ 143.687732][ T624] sd 1:0:0:0: [sdb] 0-byte physical blocks [ 143.707628][ T624] ===================================================== [ 143.708441][ T989] tipc: TX() has been purged, node left! [ 143.714693][ T624] BUG: KMSAN: uninit-value in scsi_mode_sense+0x10f0/0x17b0 [ 143.714714][ T624] CPU: 1 PID: 624 Comm: kworker/u4:6 Not tainted 5.8.0-rc5-syzkaller #0 [ 143.714722][ T624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 143.714744][ T624] Workqueue: events_unbound async_run_entry_fn [ 143.714755][ T624] Call Trace: [ 143.714778][ T624] dump_stack+0x21c/0x280 [ 143.714801][ T624] kmsan_report+0xf7/0x1e0 [ 143.714825][ T624] __msan_warning+0x58/0xa0 [ 143.714851][ T624] scsi_mode_sense+0x10f0/0x17b0 [ 143.714891][ T624] sd_revalidate_disk+0x4ffa/0xdae0 [ 143.714914][ T624] ? kobject_put+0x2d4/0x490 [ 143.714953][ T624] ? sd_resume+0x150/0x260 [ 143.714973][ T624] sd_probe+0x10d1/0x18c0 [ 143.715002][ T624] ? sd_print_result+0x6b0/0x6b0 [ 143.715024][ T624] really_probe+0xf20/0x20b0 [ 143.715047][ T624] ? kmsan_get_metadata+0x116/0x180 [ 143.715071][ T624] driver_probe_device+0x293/0x390 [ 143.715095][ T624] __device_attach_driver+0x63f/0x830 [ 143.715155][ T624] bus_for_each_drv+0x2ca/0x3f0 [ 143.822170][ T624] ? coredump_store+0xf0/0xf0 [ 143.826851][ T624] __device_attach_async_helper+0x31a/0x3f0 [ 143.832741][ T624] async_run_entry_fn+0x1a2/0x7d0 [ 143.837760][ T624] ? kmsan_get_metadata+0x116/0x180 [ 143.842968][ T624] ? __device_attach_driver+0x830/0x830 [ 143.848594][ T624] ? async_schedule_node_domain+0xcf0/0xcf0 [ 143.854478][ T624] process_one_work+0x1688/0x2140 [ 143.859509][ T624] worker_thread+0x10bc/0x2730 [ 143.864265][ T624] ? kmsan_get_metadata+0x116/0x180 [ 143.869829][ T624] kthread+0x551/0x590 [ 143.873900][ T624] ? process_one_work+0x2140/0x2140 [ 143.879087][ T624] ? kthread_blkcg+0x110/0x110 [ 143.883845][ T624] ret_from_fork+0x1f/0x30 [ 143.888252][ T624] [ 143.890562][ T624] Uninit was stored to memory at: [ 143.895576][ T624] kmsan_internal_chain_origin+0xad/0x130 [ 143.901282][ T624] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 143.907246][ T624] kmsan_memcpy_metadata+0xb/0x10 [ 143.912255][ T624] __msan_memcpy+0x43/0x50 [ 143.916660][ T624] bio_copy_kern_endio_read+0x494/0x5f0 [ 143.922192][ T624] bio_endio+0xce1/0xde0 [ 143.926424][ T624] blk_update_request+0x1178/0x2710 [ 143.931607][ T624] scsi_end_request+0x102/0xc00 [ 143.936448][ T624] scsi_io_completion+0x34f/0x2f20 [ 143.941549][ T624] scsi_finish_command+0x85b/0x880 [ 143.946646][ T624] scsi_softirq_done+0x683/0xa80 [ 143.951573][ T624] blk_done_softirq+0x2fe/0x4e0 [ 143.956413][ T624] __do_softirq+0x2ea/0x7f5 [ 143.960894][ T624] [ 143.963204][ T624] Uninit was created at: [ 143.967432][ T624] kmsan_save_stack_with_flags+0x3c/0x90 [ 143.973050][ T624] kmsan_alloc_page+0xc5/0x1a0 [ 143.977802][ T624] __alloc_pages_nodemask+0xdf0/0x1030 [ 143.983257][ T624] alloc_pages_current+0x685/0xb50 [ 143.988385][ T624] blk_rq_map_kern+0xdda/0x1570 [ 143.993223][ T624] __scsi_execute+0x318/0xc80 [ 143.997887][ T624] scsi_mode_sense+0x600/0x17b0 [ 144.002725][ T624] sd_revalidate_disk+0x4ffa/0xdae0 [ 144.007910][ T624] sd_probe+0x10d1/0x18c0 [ 144.012228][ T624] really_probe+0xf20/0x20b0 [ 144.016806][ T624] driver_probe_device+0x293/0x390 [ 144.021910][ T624] __device_attach_driver+0x63f/0x830 [ 144.027270][ T624] bus_for_each_drv+0x2ca/0x3f0 [ 144.032108][ T624] __device_attach_async_helper+0x31a/0x3f0 [ 144.037991][ T624] async_run_entry_fn+0x1a2/0x7d0 [ 144.043003][ T624] process_one_work+0x1688/0x2140 [ 144.048014][ T624] worker_thread+0x10bc/0x2730 [ 144.052762][ T624] kthread+0x551/0x590 [ 144.056824][ T624] ret_from_fork+0x1f/0x30 [ 144.061228][ T624] ===================================================== [ 144.068227][ T624] Disabling lock debugging due to kernel taint [ 144.074373][ T624] Kernel panic - not syncing: panic_on_warn set ... [ 144.080949][ T624] CPU: 1 PID: 624 Comm: kworker/u4:6 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 144.090641][ T624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.100691][ T624] Workqueue: events_unbound async_run_entry_fn [ 144.106826][ T624] Call Trace: [ 144.110122][ T624] dump_stack+0x21c/0x280 [ 144.114446][ T624] panic+0x4d7/0xef7 [ 144.118344][ T624] ? add_taint+0x17c/0x210 [ 144.122756][ T624] kmsan_report+0x1df/0x1e0 [ 144.127254][ T624] __msan_warning+0x58/0xa0 [ 144.131747][ T624] scsi_mode_sense+0x10f0/0x17b0 [ 144.136693][ T624] sd_revalidate_disk+0x4ffa/0xdae0 [ 144.141898][ T624] ? kobject_put+0x2d4/0x490 [ 144.146494][ T624] ? sd_resume+0x150/0x260 [ 144.151350][ T624] sd_probe+0x10d1/0x18c0 [ 144.155678][ T624] ? sd_print_result+0x6b0/0x6b0 [ 144.160744][ T624] really_probe+0xf20/0x20b0 [ 144.165355][ T624] ? kmsan_get_metadata+0x116/0x180 [ 144.170570][ T624] driver_probe_device+0x293/0x390 [ 144.175691][ T624] __device_attach_driver+0x63f/0x830 [ 144.181064][ T624] bus_for_each_drv+0x2ca/0x3f0 [ 144.185911][ T624] ? coredump_store+0xf0/0xf0 [ 144.190588][ T624] __device_attach_async_helper+0x31a/0x3f0 [ 144.196478][ T624] async_run_entry_fn+0x1a2/0x7d0 [ 144.201495][ T624] ? kmsan_get_metadata+0x116/0x180 [ 144.206685][ T624] ? __device_attach_driver+0x830/0x830 [ 144.212221][ T624] ? async_schedule_node_domain+0xcf0/0xcf0 [ 144.218110][ T624] process_one_work+0x1688/0x2140 [ 144.223141][ T624] worker_thread+0x10bc/0x2730 [ 144.227901][ T624] ? kmsan_get_metadata+0x116/0x180 [ 144.233102][ T624] kthread+0x551/0x590 [ 144.237162][ T624] ? process_one_work+0x2140/0x2140 [ 144.242355][ T624] ? kthread_blkcg+0x110/0x110 [ 144.247112][ T624] ret_from_fork+0x1f/0x30 [ 144.252689][ T624] Kernel Offset: disabled [ 144.257007][ T624] Rebooting in 86400 seconds..