Warning: Permanently added '10.128.0.133' (ECDSA) to the list of known hosts. syzkaller login: [ 636.956243][ T1147] INFO: task syz-executor410:6832 blocked for more than 143 seconds. [ 636.956259][ T1147] Not tainted 5.8.0-rc3-syzkaller #0 [ 636.956264][ T1147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.956271][ T1147] syz-executor410 D28544 6832 6830 0x00004004 [ 636.956292][ T1147] Call Trace: [ 636.956435][ T1147] __schedule+0x7d3/0xc40 [ 636.956457][ T1147] ? schedule+0x188/0x220 [ 636.956470][ T1147] ? schedule_preempt_disabled+0xf/0x20 [ 636.956480][ T1147] ? __mutex_lock_common+0x129f/0x2fc0 [ 636.956598][ T1147] ? fb_open+0x14b/0x3b0 [ 636.956618][ T1147] ? mutex_lock_nested+0x1a/0x20 [ 636.956627][ T1147] ? fb_open+0x14b/0x3b0 [ 636.956716][ T1147] ? chrdev_open+0x498/0x580 [ 636.956728][ T1147] ? cd_forget+0x160/0x160 [ 636.956740][ T1147] ? do_dentry_open+0x813/0x1070 [ 636.956760][ T1147] ? path_openat+0x278d/0x37f0 [ 636.956807][ T1147] ? do_filp_open+0x191/0x3a0 [ 636.956827][ T1147] ? _raw_spin_unlock+0x24/0x40 [ 636.956863][ T1147] ? __alloc_fd+0x55c/0x600 [ 636.956882][ T1147] ? do_sys_openat2+0x463/0x770 [ 636.956900][ T1147] ? __x64_sys_openat+0x1c8/0x1f0 [ 636.956916][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.956951][ T1147] ? do_syscall_64+0x73/0xe0 [ 636.956964][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.956986][ T1147] INFO: task syz-executor410:6833 blocked for more than 143 seconds. [ 636.956992][ T1147] Not tainted 5.8.0-rc3-syzkaller #0 [ 636.956997][ T1147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.957003][ T1147] syz-executor410 D28496 6833 6828 0x00004004 [ 636.957022][ T1147] Call Trace: [ 636.957035][ T1147] __schedule+0x7d3/0xc40 [ 636.957055][ T1147] ? schedule+0x188/0x220 [ 636.957067][ T1147] ? schedule_preempt_disabled+0xf/0x20 [ 636.957077][ T1147] ? __mutex_lock_common+0x129f/0x2fc0 [ 636.957097][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957116][ T1147] ? mutex_lock_nested+0x1a/0x20 [ 636.957125][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957139][ T1147] ? chrdev_open+0x498/0x580 [ 636.957150][ T1147] ? cd_forget+0x160/0x160 [ 636.957162][ T1147] ? do_dentry_open+0x813/0x1070 [ 636.957181][ T1147] ? path_openat+0x278d/0x37f0 [ 636.957221][ T1147] ? do_filp_open+0x191/0x3a0 [ 636.957241][ T1147] ? _raw_spin_unlock+0x24/0x40 [ 636.957250][ T1147] ? __alloc_fd+0x55c/0x600 [ 636.957269][ T1147] ? do_sys_openat2+0x463/0x770 [ 636.957286][ T1147] ? __x64_sys_openat+0x1c8/0x1f0 [ 636.957301][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.957312][ T1147] ? do_syscall_64+0x73/0xe0 [ 636.957324][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.957344][ T1147] INFO: task syz-executor410:6834 blocked for more than 143 seconds. [ 636.957350][ T1147] Not tainted 5.8.0-rc3-syzkaller #0 [ 636.957355][ T1147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.957359][ T1147] syz-executor410 D27600 6834 6826 0x00004004 [ 636.957375][ T1147] Call Trace: [ 636.957388][ T1147] __schedule+0x7d3/0xc40 [ 636.957407][ T1147] ? schedule+0x188/0x220 [ 636.957420][ T1147] ? schedule_preempt_disabled+0xf/0x20 [ 636.957429][ T1147] ? __mutex_lock_common+0x129f/0x2fc0 [ 636.957449][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957467][ T1147] ? mutex_lock_nested+0x1a/0x20 [ 636.957476][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957491][ T1147] ? chrdev_open+0x498/0x580 [ 636.957502][ T1147] ? cd_forget+0x160/0x160 [ 636.957514][ T1147] ? do_dentry_open+0x813/0x1070 [ 636.957533][ T1147] ? path_openat+0x278d/0x37f0 [ 636.957572][ T1147] ? do_filp_open+0x191/0x3a0 [ 636.957592][ T1147] ? _raw_spin_unlock+0x24/0x40 [ 636.957601][ T1147] ? __alloc_fd+0x55c/0x600 [ 636.957620][ T1147] ? do_sys_openat2+0x463/0x770 [ 636.957638][ T1147] ? __x64_sys_openat+0x1c8/0x1f0 [ 636.957653][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.957663][ T1147] ? do_syscall_64+0x73/0xe0 [ 636.957675][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.957695][ T1147] INFO: task syz-executor410:6835 blocked for more than 143 seconds. [ 636.957701][ T1147] Not tainted 5.8.0-rc3-syzkaller #0 [ 636.957706][ T1147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.957710][ T1147] syz-executor410 D27664 6835 6829 0x00004004 [ 636.957726][ T1147] Call Trace: [ 636.957738][ T1147] __schedule+0x7d3/0xc40 [ 636.957758][ T1147] ? schedule+0x188/0x220 [ 636.957770][ T1147] ? schedule_preempt_disabled+0xf/0x20 [ 636.957779][ T1147] ? __mutex_lock_common+0x129f/0x2fc0 [ 636.957804][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957823][ T1147] ? mutex_lock_nested+0x1a/0x20 [ 636.957832][ T1147] ? fb_open+0x14b/0x3b0 [ 636.957847][ T1147] ? chrdev_open+0x498/0x580 [ 636.957857][ T1147] ? cd_forget+0x160/0x160 [ 636.957869][ T1147] ? do_dentry_open+0x813/0x1070 [ 636.957888][ T1147] ? path_openat+0x278d/0x37f0 [ 636.957928][ T1147] ? do_filp_open+0x191/0x3a0 [ 636.957948][ T1147] ? _raw_spin_unlock+0x24/0x40 [ 636.957957][ T1147] ? __alloc_fd+0x55c/0x600 [ 636.957976][ T1147] ? do_sys_openat2+0x463/0x770 [ 636.957993][ T1147] ? __x64_sys_openat+0x1c8/0x1f0 [ 636.958009][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.958019][ T1147] ? do_syscall_64+0x73/0xe0 [ 636.958048][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.958068][ T1147] INFO: task syz-executor410:6836 blocked for more than 143 seconds. [ 636.958074][ T1147] Not tainted 5.8.0-rc3-syzkaller #0 [ 636.958079][ T1147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.958083][ T1147] syz-executor410 D27776 6836 6831 0x00004004 [ 636.958102][ T1147] Call Trace: [ 636.958115][ T1147] __schedule+0x7d3/0xc40 [ 636.958134][ T1147] ? schedule+0x188/0x220 [ 636.958147][ T1147] ? schedule_preempt_disabled+0xf/0x20 [ 636.958156][ T1147] ? __mutex_lock_common+0x129f/0x2fc0 [ 636.958176][ T1147] ? fb_open+0x14b/0x3b0 [ 636.958195][ T1147] ? mutex_lock_nested+0x1a/0x20 [ 636.958204][ T1147] ? fb_open+0x14b/0x3b0 [ 636.958218][ T1147] ? chrdev_open+0x498/0x580 [ 636.958229][ T1147] ? cd_forget+0x160/0x160 [ 636.958241][ T1147] ? do_dentry_open+0x813/0x1070 [ 636.958260][ T1147] ? path_openat+0x278d/0x37f0 [ 636.958299][ T1147] ? do_filp_open+0x191/0x3a0 [ 636.958319][ T1147] ? _raw_spin_unlock+0x24/0x40 [ 636.958328][ T1147] ? __alloc_fd+0x55c/0x600 [ 636.958347][ T1147] ? do_sys_openat2+0x463/0x770 [ 636.958365][ T1147] ? __x64_sys_openat+0x1c8/0x1f0 [ 636.958380][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.958390][ T1147] ? do_syscall_64+0x73/0xe0 [ 636.958402][ T1147] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.958420][ T1147] [ 636.958420][ T1147] Showing all locks held in the system: [ 636.958431][ T1147] 1 lock held by khungtaskd/1147: [ 636.958435][ T1147] #0: ffffffff892e9490 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 636.958543][ T1147] 1 lock held by in:imklog/6509: [ 636.958547][ T1147] #0: ffff88809df40930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x253/0x2f0 [ 636.958573][ T1147] 2 locks held by syz-executor410/6827: [ 636.958580][ T1147] 1 lock held by syz-executor410/6832: [ 636.958584][ T1147] #0: ffff8880a386f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0x14b/0x3b0 [ 636.958606][ T1147] 1 lock held by syz-executor410/6833: [ 636.958610][ T1147] #0: ffff8880a386f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0x14b/0x3b0 [ 636.958632][ T1147] 1 lock held by syz-executor410/6834: [ 636.958636][ T1147] #0: ffff8880a386f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0x14b/0x3b0 [ 636.958658][ T1147] 1 lock held by syz-executor410/6835: [ 636.958662][ T1147] #0: ffff8880a386f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0x14b/0x3b0 [ 636.958684][ T1147] 1 lock held by syz-executor410/6836: [ 636.958688][ T1147] #0: ffff8880a386f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0x14b/0x3b0 [ 636.958707][ T1147] [ 636.958711][ T1147] ============================================= [ 636.958711][ T1147] [ 636.958717][ T1147] NMI backtrace for cpu 0 [ 636.958727][ T1147] CPU: 0 PID: 1147 Comm: khungtaskd Not tainted 5.8.0-rc3-syzkaller #0 [ 636.958733][ T1147] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 636.958736][ T1147] Call Trace: [ 636.958797][ T1147] dump_stack+0x1f0/0x31e [ 636.958810][ T1147] nmi_cpu_backtrace+0x9f/0x180 [ 636.958853][ T1147] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 636.958864][ T1147] nmi_trigger_cpumask_backtrace+0x16a/0x280 [ 636.958898][ T1147] watchdog+0xd65/0xdb0 [ 636.958942][ T1147] kthread+0x37e/0x3a0 [ 636.958952][ T1147] ? hungtask_pm_notify+0x50/0x50 [ 636.958960][ T1147] ? kthread_blkcg+0xd0/0xd0 [ 636.958991][ T1147] ret_from_fork+0x1f/0x30 [ 636.959009][ T1147] Sending NMI from CPU 0 to CPUs 1: [ 636.959300][ C1] NMI backtrace for cpu 1 [ 636.959304][ C1] CPU: 1 PID: 6827 Comm: syz-executor410 Not tainted 5.8.0-rc3-syzkaller #0 [ 636.959308][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 636.959310][ C1] RIP: 0010:bitfill_aligned+0x118/0x1f0 [ 636.959316][ C1] Code: 24 10 48 8b 03 49 31 c6 49 21 ee 49 31 c6 4c 89 33 e9 da 00 00 00 e8 27 67 a2 fd 44 8b 24 24 48 8b 44 24 18 31 d2 f7 74 24 04 <89> c5 bf 07 00 00 00 89 c6 e8 1a 6b a2 fd 83 fd 07 76 3b 4c 8b 7c [ 636.959319][ C1] RSP: 0018:ffffc90000f87908 EFLAGS: 00000246 [ 636.959323][ C1] RAX: 0000000000000028 RBX: ffff8880000a0000 RCX: ffff8880939cc240 [ 636.959326][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 636.959329][ C1] RBP: 0000000000000000 R08: ffffffff83d21478 R09: 0000000000000040 [ 636.959332][ C1] R10: 0000000000000002 R11: ffff8880939cc240 R12: 0000000000000000 [ 636.959334][ C1] R13: ffffffffffffffff R14: 0000000000000000 R15: 00000000000009c0 [ 636.959338][ C1] FS: 000000000161c880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 636.959340][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 636.959343][ C1] CR2: 0000000020000180 CR3: 00000000a003d000 CR4: 00000000001406e0 [ 636.959346][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 636.959348][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 636.959350][ C1] Call Trace: [ 636.959352][ C1] ? bitfill_aligned_rev+0x1e0/0x1e0 [ 636.959354][ C1] cfb_fillrect+0x57b/0x790 [ 636.959356][ C1] bit_clear_margins+0x37b/0x620 [ 636.959358][ C1] fbcon_switch+0x1448/0x1e40 [ 636.959360][ C1] redraw_screen+0x4fc/0x16f0 [ 636.959362][ C1] fbcon_modechanged+0x8d5/0xd90 [ 636.959364][ C1] fb_set_var+0x825/0xcc0 [ 636.959365][ C1] do_fb_ioctl+0x502/0x6f0 [ 636.959367][ C1] ? fb_write+0x540/0x540 [ 636.959369][ C1] __se_sys_ioctl+0xf9/0x160 [ 636.959371][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.959373][ C1] do_syscall_64+0x73/0xe0 [ 636.959376][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.959377][ C1] RIP: 0033:0x441459 [ 636.959379][ C1] Code: Bad RIP value. [ 636.959381][ C1] RSP: 002b:00007fff244019e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 636.959386][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441459 [ 636.959389][ C1] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 636.959392][ C1] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 636.959395][ C1] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021d0 [ 636.959397][ C1] R13: 0000000000402260 R14: 0000000000000000 R15: 0000000000000000 [ 636.966420][ T1147] Kernel panic - not syncing: hung_task: blocked tasks [ 636.966435][ T1147] CPU: 0 PID: 1147 Comm: khungtaskd Not tainted 5.8.0-rc3-syzkaller #0 [ 636.966441][ T1147] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 636.966445][ T1147] Call Trace: [ 636.966463][ T1147] dump_stack+0x1f0/0x31e [ 636.966530][ T1147] panic+0x264/0x7a0 [ 636.966543][ T1147] ? nmi_trigger_cpumask_backtrace+0x206/0x280 [ 636.966557][ T1147] watchdog+0xda5/0xdb0 [ 636.966575][ T1147] kthread+0x37e/0x3a0 [ 636.966584][ T1147] ? hungtask_pm_notify+0x50/0x50 [ 636.966592][ T1147] ? kthread_blkcg+0xd0/0xd0 [ 636.966605][ T1147] ret_from_fork+0x1f/0x30 [ 636.968125][ T1147] Kernel Offset: disabled [ 638.116502][ T1147] Rebooting in 86400 seconds..