[ 41.487077] audit: type=1800 audit(1576979591.684:32): pid=7588 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 45.566803] kauditd_printk_skb: 2 callbacks suppressed [ 45.566819] audit: type=1400 audit(1576979595.794:35): avc: denied { map } for pid=7762 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.205' (ECDSA) to the list of known hosts. executing program executing program executing program [ 654.979305] audit: type=1400 audit(1576980205.214:36): avc: denied { map } for pid=7774 comm="syz-executor102" path="/root/syz-executor102734873" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 898.017092] INFO: task login:8053 blocked for more than 140 seconds. [ 898.023821] Not tainted 4.19.91-syzkaller #0 [ 898.030236] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 898.038494] login D27504 8053 1 0x80000002 [ 898.044137] Call Trace: [ 898.046782] __schedule+0x866/0x1dc0 [ 898.055389] ? firmware_map_remove+0x1a7/0x1a7 [ 898.060287] ? mark_held_locks+0x100/0x100 [ 898.064536] ? mark_held_locks+0x100/0x100 [ 898.069100] schedule+0x92/0x1c0 [ 898.072537] schedule_timeout+0x8c8/0xfc0 [ 898.076767] ? __ldsem_down_write_nested+0x3ab/0x8f0 [ 898.082250] ? find_held_lock+0x35/0x130 [ 898.086322] ? usleep_range+0x170/0x170 [ 898.090601] ? mark_held_locks+0xb1/0x100 [ 898.094764] ? _raw_spin_unlock_irq+0x28/0x90 [ 898.099555] ? __ldsem_down_write_nested+0x3ab/0x8f0 [ 898.104667] ? _raw_spin_unlock_irq+0x28/0x90 [ 898.109529] ? lockdep_hardirqs_on+0x415/0x5d0 [ 898.114124] ? trace_hardirqs_on+0x67/0x220 [ 898.118751] __ldsem_down_write_nested+0x3b3/0x8f0 [ 898.123701] ? __ldsem_down_read_nested+0x720/0x720 [ 898.129022] ? __lock_is_held+0xb6/0x140 [ 898.133111] ldsem_down_write+0x33/0x40 [ 898.137386] ? ldsem_down_write+0x33/0x40 [ 898.141558] tty_ldisc_lock+0x50/0x90 [ 898.145366] tty_ldisc_hangup+0x1b9/0x630 [ 898.149850] __tty_hangup.part.0+0x306/0x720 [ 898.154266] ? tty_read+0x2a0/0x2a0 [ 898.158327] tty_vhangup_session+0x25/0x30 [ 898.162585] disassociate_ctty.part.0+0xb4/0x6f0 [ 898.167662] disassociate_ctty+0x81/0xa0 [ 898.171733] do_exit+0x17bb/0x3080 [ 898.175323] ? vfs_write+0x71/0x560 [ 898.179273] ? mm_update_next_owner+0x660/0x660 [ 898.183963] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 898.189828] ? ksys_write+0x1f1/0x2d0 [ 898.193646] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 898.198871] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 898.203641] do_group_exit+0x135/0x370 [ 898.207822] __x64_sys_exit_group+0x44/0x50 [ 898.212154] do_syscall_64+0xfd/0x620 [ 898.215965] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 898.221655] RIP: 0033:0x7fba27cfa1e8 [ 898.225398] Code: Bad RIP value. [ 898.229241] RSP: 002b:00007ffdcdc89ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 898.237229] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fba27cfa1e8 [ 898.244507] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 898.252095] RBP: 00007fba27fcf840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 898.259774] R10: 00007fba27fd5740 R11: 0000000000000246 R12: 00007fba27fcf840 [ 898.267332] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 898.274637] [ 898.274637] Showing all locks held in the system: [ 898.281252] 1 lock held by khungtaskd/1068: [ 898.285575] #0: 0000000059bdc926 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 898.294522] 1 lock held by rsyslogd/7626: [ 898.298923] #0: 00000000df739f4b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 898.306845] 2 locks held by getty/7750: [ 898.311094] #0: 0000000029740b48 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.319620] #1: 00000000f78c87c0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.328742] 2 locks held by getty/7751: [ 898.332714] #0: 0000000060f34c3a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.341269] #1: 00000000ccf7b93f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.350395] 2 locks held by getty/7752: [ 898.354369] #0: 000000009b95219a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.362902] #1: 00000000880c2b44 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.372025] 2 locks held by getty/7753: [ 898.375999] #0: 0000000058f77172 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.384518] #1: 0000000087b2e7cf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.393685] 2 locks held by getty/7754: [ 898.397910] #0: 0000000068b3961a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.406161] #1: 00000000a83ca8b1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.415448] 2 locks held by getty/7755: [ 898.419678] #0: 0000000024ed2203 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 898.428192] #1: 0000000035318b82 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 898.437312] 2 locks held by login/8053: [ 898.441293] #0: 000000002729b777 (&tty->legacy_mutex){+.+.}, at: tty_lock+0x73/0xb0 [ 898.449468] #1: 00000000ee8a9d22 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 898.458144] 3 locks held by syz-executor102/8140: [ 898.462987] [ 898.464612] ============================================= [ 898.464612] [ 898.471933] NMI backtrace for cpu 0 [ 898.475574] CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.19.91-syzkaller #0 [ 898.482932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 898.492283] Call Trace: [ 898.494953] dump_stack+0x197/0x210 [ 898.498599] nmi_cpu_backtrace.cold+0x63/0xa4 [ 898.503102] ? lapic_can_unplug_cpu.cold+0x47/0x47 [ 898.508056] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 898.513369] arch_trigger_cpumask_backtrace+0x14/0x20 [ 898.518582] watchdog+0x9df/0xee0 [ 898.522051] kthread+0x354/0x420 [ 898.525419] ? reset_hung_task_detector+0x30/0x30 [ 898.530269] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 898.535812] ret_from_fork+0x24/0x30 [ 898.539641] Sending NMI from CPU 0 to CPUs 1: [ 898.544774] NMI backtrace for cpu 1 [ 898.544781] CPU: 1 PID: 8140 Comm: syz-executor102 Not tainted 4.19.91-syzkaller #0 [ 898.544789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 898.544793] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 [ 898.544807] Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 78 a9 96 7e 81 e2 00 01 1f 00 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48 [ 898.544812] RSP: 0018:ffff88808e2ff7d0 EFLAGS: 00000046 [ 898.544821] RAX: ffff88808d16e4c0 RBX: 0000000000000000 RCX: ffffffff81707a96 [ 898.544827] RDX: 0000000000000000 RSI: ffffffff81707a9f RDI: 0000000000000005 [ 898.544833] RBP: ffff88808e2ff7d0 R08: ffff88808d16e4c0 R09: ffffed1011a2dc9b [ 898.544839] R10: ffffed1011a2dc9a R11: ffff88808d16e4d7 R12: 0000000000000000 [ 898.544845] R13: 000000000002c240 R14: ffff88808d16e4c0 R15: ffff8880ae92c240 [ 898.544851] FS: 0000000001db2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 898.544856] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 898.544862] CR2: ffffffffff600400 CR3: 000000008f11f000 CR4: 00000000001406e0 [ 898.544868] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 898.544874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 898.544876] Call Trace: [ 898.544880] trace_hardirqs_off+0x2f/0x220 [ 898.544884] __schedule+0x1df/0x1dc0 [ 898.544888] ? firmware_map_remove+0x1a7/0x1a7 [ 898.544891] schedule+0x92/0x1c0 [ 898.544895] paste_selection+0x2e8/0x443 [ 898.544899] ? set_selection+0x1370/0x1370 [ 898.544903] ? lock_downgrade+0x880/0x880 [ 898.544907] ? wake_up_q+0x100/0x100 [ 898.544910] tioclinux+0x133/0x470 [ 898.544914] vt_ioctl+0x19ab/0x2530 [ 898.544918] ? complete_change_console+0x3a0/0x3a0 [ 898.544922] ? avc_has_extended_perms+0xa78/0x10f0 [ 898.544926] ? lock_downgrade+0x880/0x880 [ 898.544930] ? avc_ss_reset+0x190/0x190 [ 898.544934] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 898.544939] ? tty_jobctrl_ioctl+0x50/0xcd0 [ 898.544943] ? complete_change_console+0x3a0/0x3a0 [ 898.544947] tty_ioctl+0x7f3/0x1510 [ 898.544950] ? tty_vhangup+0x30/0x30 [ 898.544955] ? thp_get_unmapped_area+0x1f0/0x1f0 [ 898.544959] ? __handle_mm_fault+0x7d1/0x3f80 [ 898.544963] ? __might_sleep+0x95/0x190 [ 898.544966] ? tty_vhangup+0x30/0x30 [ 898.544970] do_vfs_ioctl+0xd5f/0x1380 [ 898.544974] ? selinux_file_ioctl+0x46f/0x5e0 [ 898.544978] ? selinux_file_ioctl+0x125/0x5e0 [ 898.544982] ? ioctl_preallocate+0x210/0x210 [ 898.544986] ? selinux_file_mprotect+0x620/0x620 [ 898.544990] ? gup_pgd_range+0x1a1c/0x3910 [ 898.544994] ? __sanitizer_cov_trace_cmp1+0xb/0x20 [ 898.544997] ? up_read+0x1a/0x110 [ 898.545002] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 898.545007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 898.545011] ? security_file_ioctl+0x8d/0xc0 [ 898.545014] ksys_ioctl+0xab/0xd0 [ 898.545018] __x64_sys_ioctl+0x73/0xb0 [ 898.545022] do_syscall_64+0xfd/0x620 [ 898.545026] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 898.545029] RIP: 0033:0x441219 [ 898.545042] Code: e8 3c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 898.545070] RSP: 002b:00007fff38e276e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 898.545081] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441219 [ 898.545087] RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000003 [ 898.545093] RBP: 00000000000a5c4d R08: 000000000000000d R09: 00000000004002c8 [ 898.545099] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402040 [ 898.545105] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 898.545771] Kernel panic - not syncing: hung_task: blocked tasks [ 898.908523] CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.19.91-syzkaller #0 [ 898.915886] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 898.925238] Call Trace: [ 898.927837] dump_stack+0x197/0x210 [ 898.931471] panic+0x26a/0x50e [ 898.934664] ? __warn_printk+0xf3/0xf3 [ 898.938553] ? lapic_can_unplug_cpu.cold+0x47/0x47 [ 898.943490] ? ___preempt_schedule+0x16/0x18 [ 898.947938] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 898.953396] ? nmi_trigger_cpumask_backtrace+0x1c1/0x1f8 [ 898.958853] ? nmi_trigger_cpumask_backtrace+0x1cb/0x1f8 [ 898.964308] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 898.969769] watchdog+0x9f0/0xee0 [ 898.973237] kthread+0x354/0x420 [ 898.976605] ? reset_hung_task_detector+0x30/0x30 [ 898.981452] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 898.986995] ret_from_fork+0x24/0x30 [ 898.992205] Kernel Offset: disabled [ 898.995839] Rebooting in 86400 seconds..