[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.108738][ T30] audit: type=1800 audit(1563750789.166:25): pid=12303 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 80.132971][ T30] audit: type=1800 audit(1563750789.196:26): pid=12303 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 80.181996][ T30] audit: type=1800 audit(1563750789.216:27): pid=12303 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 '10.128.15.206' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.765485][T12454] IPVS: ftp: loaded support on port[0] = 21 [ 93.082098][ T3022] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 93.322090][ T3022] usb 1-1: Using ep0 maxpacket: 8 [ 93.442204][ T3022] usb 1-1: config 0 has an invalid interface number: 234 but max is 0 [ 93.450437][ T3022] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 93.460698][ T3022] usb 1-1: config 0 has no interface number 0 [ 93.466953][ T3022] usb 1-1: config 0 interface 234 altsetting 0 bulk endpoint 0x8 has invalid maxpacket 0 [ 93.476973][ T3022] usb 1-1: New USB device found, idVendor=1618, idProduct=9113, bcdDevice=9a.da [ 93.486120][ T3022] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 93.495681][ T3022] usb 1-1: config 0 descriptor?? [ 93.772352][ T3022] usb 1-1: string descriptor 0 read error: -71 [ 93.782187][ T3022] rsi_91x: rsi_probe: Failed to init usb interface [ 93.791707][ T3022] rsi_91x: rsi_probe: Failed in probe...Exiting [ 93.798271][ T3022] RSI-USB WLAN: probe of 1-1:0.234 failed with error -22 [ 93.808717][ T3022] usb 1-1: USB disconnect, device number 2 [ 93.852103][ C1] ================================================================== [ 93.860214][ C1] BUG: KMSAN: uninit-value in exit_creds+0xb0/0x450 [ 93.866785][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.2.0+ #15 [ 93.874087][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.884240][ C1] Call Trace: [ 93.887506][ C1] [ 93.890345][ C1] dump_stack+0x191/0x1f0 [ 93.894665][ C1] kmsan_report+0x162/0x2d0 [ 93.899152][ C1] __msan_warning+0x75/0xe0 [ 93.903640][ C1] exit_creds+0xb0/0x450 [ 93.907861][ C1] ? security_task_free+0x161/0x1a0 [ 93.913041][ C1] __put_task_struct+0x12b/0x840 [ 93.917977][ C1] ? refcount_dec_and_test_checked+0x187/0x210 [ 93.924128][ C1] delayed_put_task_struct+0x23b/0x270 [ 93.929569][ C1] ? release_task+0x24a0/0x24a0 [ 93.934429][ C1] rcu_core+0xb45/0x1910 [ 93.938659][ C1] ? cpumask_weight+0x60/0x60 [ 93.943315][ C1] __do_softirq+0x4ad/0x858 [ 93.947803][ C1] irq_exit+0x238/0x290 [ 93.952048][ C1] exiting_irq+0xe/0x10 [ 93.956201][ C1] smp_apic_timer_interrupt+0x48/0x70 [ 93.961549][ C1] apic_timer_interrupt+0x2e/0x40 [ 93.966565][ C1] [ 93.969490][ C1] RIP: 0010:default_idle+0x232/0x450 [ 93.974754][ C1] Code: 37 f3 8b 1d 40 8c df 01 48 c7 c7 f0 f5 24 90 e8 f4 42 bb f3 83 38 00 0f 85 a4 01 00 00 85 db 7e 07 0f 00 2d 30 e3 5b 00 fb f4 <65> 8b 05 47 47 bd 71 89 45 c4 8b 1d 16 9e 7f 01 48 c7 c7 f8 07 c5 [ 93.994355][ C1] RSP: 0018:ffff8881280bfde0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 94.002753][ C1] RAX: ffff888217c395f0 RBX: 0000000000000000 RCX: ffff888000000000 [ 94.010704][ C1] RDX: ffff888207e325f0 RSI: 0000160000000000 RDI: 00000000000005f0 [ 94.019118][ C1] RBP: ffff8881280bfe20 R08: 000000001024f5f0 R09: 0000778000000000 [ 94.027082][ C1] R10: ffffd0ffffffffff R11: 0000000000000004 R12: ffff888128090990 [ 94.035037][ C1] R13: 0000000000000000 R14: ffff888128090000 R15: ffff888128090990 [ 94.043008][ C1] ? __cpuidle_text_start+0x8/0x8 [ 94.048016][ C1] ? __cpuidle_text_start+0x8/0x8 [ 94.053022][ C1] arch_cpu_idle+0x25/0x30 [ 94.057426][ C1] do_idle+0x1d7/0x790 [ 94.061495][ C1] cpu_startup_entry+0x45/0x50 [ 94.066237][ C1] ? setup_APIC_timer+0x210/0x210 [ 94.071240][ C1] start_secondary+0x3c0/0x4d0 [ 94.076007][ C1] secondary_startup_64+0xa4/0xb0 [ 94.081031][ C1] [ 94.083344][ C1] Uninit was stored to memory at: [ 94.088349][ C1] kmsan_internal_chain_origin+0xcc/0x150 [ 94.094061][ C1] __msan_chain_origin+0x6b/0xe0 [ 94.098981][ C1] commit_creds+0xcc8/0x1430 [ 94.103556][ C1] install_exec_creds+0x7d/0x1a0 [ 94.108658][ C1] load_elf_binary+0x132b/0x5f60 [ 94.113598][ C1] search_binary_handler+0x2f4/0xad0 [ 94.118865][ C1] __do_execve_file+0x2218/0x2ed0 [ 94.123883][ C1] __se_sys_execve+0xec/0x110 [ 94.128543][ C1] __x64_sys_execve+0x4a/0x70 [ 94.133199][ C1] do_syscall_64+0xbc/0xf0 [ 94.137592][ C1] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 94.143455][ C1] [ 94.145760][ C1] Uninit was created at: [ 94.149998][ C1] kmsan_internal_poison_shadow+0x53/0xa0 [ 94.155721][ C1] kmsan_slab_free+0x8d/0x100 [ 94.160373][ C1] kfree+0x4b2/0x2960 [ 94.164426][ C1] rsi_91x_deinit+0x40e/0x460 [ 94.169080][ C1] rsi_probe+0x1ebf/0x24d0 [ 94.173487][ C1] usb_probe_interface+0xd19/0x1310 [ 94.178665][ C1] really_probe+0x1344/0x1d90 [ 94.183337][ C1] driver_probe_device+0x1ba/0x510 [ 94.188463][ C1] __device_attach_driver+0x5b8/0x790 [ 94.193814][ C1] bus_for_each_drv+0x28e/0x3b0 [ 94.198642][ C1] __device_attach+0x489/0x750 [ 94.203414][ C1] device_initial_probe+0x4a/0x60 [ 94.208419][ C1] bus_probe_device+0x131/0x390 [ 94.213257][ C1] device_add+0x25b5/0x2df0 [ 94.217754][ C1] usb_set_configuration+0x309f/0x3710 [ 94.223189][ C1] generic_probe+0xe7/0x280 [ 94.227670][ C1] usb_probe_device+0x146/0x200 [ 94.232514][ C1] really_probe+0x1344/0x1d90 [ 94.237176][ C1] driver_probe_device+0x1ba/0x510 [ 94.242264][ C1] __device_attach_driver+0x5b8/0x790 [ 94.247611][ C1] bus_for_each_drv+0x28e/0x3b0 [ 94.252437][ C1] __device_attach+0x489/0x750 [ 94.257178][ C1] device_initial_probe+0x4a/0x60 [ 94.262181][ C1] bus_probe_device+0x131/0x390 [ 94.267006][ C1] device_add+0x25b5/0x2df0 [ 94.271488][ C1] usb_new_device+0x23e5/0x2fb0 [ 94.276314][ C1] hub_event+0x5853/0x7320 [ 94.280707][ C1] process_one_work+0x1572/0x1f00 [ 94.285708][ C1] worker_thread+0x111b/0x2460 [ 94.290466][ C1] kthread+0x4b5/0x4f0 [ 94.294528][ C1] ret_from_fork+0x35/0x40 [ 94.298917][ C1] ================================================================== [ 94.306972][ C1] Disabling lock debugging due to kernel taint [ 94.313136][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 94.319732][ C1] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.2.0+ #15 [ 94.327963][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.338001][ C1] Call Trace: [ 94.341264][ C1] [ 94.344133][ C1] dump_stack+0x191/0x1f0 [ 94.348555][ C1] panic+0x3c9/0xc1e [ 94.352445][ C1] kmsan_report+0x2ca/0x2d0 [ 94.356931][ C1] __msan_warning+0x75/0xe0 [ 94.361418][ C1] exit_creds+0xb0/0x450 [ 94.365661][ C1] ? security_task_free+0x161/0x1a0 [ 94.370865][ C1] __put_task_struct+0x12b/0x840 [ 94.375786][ C1] ? refcount_dec_and_test_checked+0x187/0x210 [ 94.381923][ C1] delayed_put_task_struct+0x23b/0x270 [ 94.387370][ C1] ? release_task+0x24a0/0x24a0 [ 94.392232][ C1] rcu_core+0xb45/0x1910 [ 94.396493][ C1] ? cpumask_weight+0x60/0x60 [ 94.401167][ C1] __do_softirq+0x4ad/0x858 [ 94.405663][ C1] irq_exit+0x238/0x290 [ 94.409873][ C1] exiting_irq+0xe/0x10 [ 94.414014][ C1] smp_apic_timer_interrupt+0x48/0x70 [ 94.419379][ C1] apic_timer_interrupt+0x2e/0x40 [ 94.424503][ C1] [ 94.427429][ C1] RIP: 0010:default_idle+0x232/0x450 [ 94.432697][ C1] Code: 37 f3 8b 1d 40 8c df 01 48 c7 c7 f0 f5 24 90 e8 f4 42 bb f3 83 38 00 0f 85 a4 01 00 00 85 db 7e 07 0f 00 2d 30 e3 5b 00 fb f4 <65> 8b 05 47 47 bd 71 89 45 c4 8b 1d 16 9e 7f 01 48 c7 c7 f8 07 c5 [ 94.452366][ C1] RSP: 0018:ffff8881280bfde0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 94.460756][ C1] RAX: ffff888217c395f0 RBX: 0000000000000000 RCX: ffff888000000000 [ 94.468707][ C1] RDX: ffff888207e325f0 RSI: 0000160000000000 RDI: 00000000000005f0 [ 94.476743][ C1] RBP: ffff8881280bfe20 R08: 000000001024f5f0 R09: 0000778000000000 [ 94.484715][ C1] R10: ffffd0ffffffffff R11: 0000000000000004 R12: ffff888128090990 [ 94.492692][ C1] R13: 0000000000000000 R14: ffff888128090000 R15: ffff888128090990 [ 94.500664][ C1] ? __cpuidle_text_start+0x8/0x8 [ 94.505672][ C1] ? __cpuidle_text_start+0x8/0x8 [ 94.510695][ C1] arch_cpu_idle+0x25/0x30 [ 94.515094][ C1] do_idle+0x1d7/0x790 [ 94.519149][ C1] cpu_startup_entry+0x45/0x50 [ 94.523889][ C1] ? setup_APIC_timer+0x210/0x210 [ 94.528892][ C1] start_secondary+0x3c0/0x4d0 [ 94.533650][ C1] secondary_startup_64+0xa4/0xb0 [ 94.539920][ C1] Kernel Offset: disabled [ 94.544248][ C1] Rebooting in 86400 seconds..