Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 483.486959] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.503142] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal executing program executing program [ 483.571414] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.591233] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal executing program [ 483.648906] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.672290] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal executing program [ 483.731619] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.751328] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal executing program [ 483.805706] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.830921] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal [ 483.877397] EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended [ 483.892517] EXT4-fs (loop0): can't mount with journal_checksum, fs mounted w/o journal [ 717.440010] INFO: task syz-executor066:8143 blocked for more than 140 seconds. [ 717.447665] Not tainted 4.19.195-syzkaller #0 [ 717.454106] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.462591] syz-executor066 D28088 8143 8106 0x00000004 [ 717.468226] Call Trace: [ 717.471532] __schedule+0x887/0x2040 [ 717.475246] ? io_schedule_timeout+0x140/0x140 [ 717.480883] ? check_preemption_disabled+0x41/0x280 [ 717.485921] ? mark_held_locks+0xf0/0xf0 [ 717.490849] ? trace_hardirqs_off+0x64/0x200 [ 717.495280] schedule+0x8d/0x1b0 [ 717.498663] schedule_timeout+0x92d/0xfe0 [ 717.503818] ? usleep_range+0x170/0x170 [ 717.507921] ? wait_for_common+0x294/0x470 [ 717.513000] ? mark_held_locks+0xa6/0xf0 [ 717.517078] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.522304] wait_for_common+0x29c/0x470 [ 717.526384] ? try_to_wake_up+0x733/0x1050 [ 717.531300] ? bit_wait_io_timeout+0x100/0x100 [ 717.535878] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.541169] ? wake_up_q+0xe0/0xe0 [ 717.544728] kthread_stop+0x109/0x6b0 [ 717.548529] ext4_fill_super+0x7911/0xc7f0 [ 717.553766] ? ext4_calculate_overhead+0x11c0/0x11c0 [ 717.558884] ? snprintf+0xbb/0xf0 [ 717.564087] ? wait_for_completion_io+0x10/0x10 [ 717.568776] ? set_blocksize+0x163/0x3f0 [ 717.573591] mount_bdev+0x2fc/0x3b0 [ 717.577221] ? ext4_calculate_overhead+0x11c0/0x11c0 [ 717.583090] mount_fs+0xa3/0x310 [ 717.586465] vfs_kern_mount.part.0+0x68/0x470 [ 717.591751] do_mount+0x113c/0x2f10 [ 717.595386] ? cmp_ex_sort+0xc0/0xc0 [ 717.599094] ? __do_page_fault+0x180/0xd60 [ 717.604324] ? copy_mount_string+0x40/0x40 [ 717.608569] ? copy_mount_options+0x1cd/0x380 [ 717.613785] ? memset+0x20/0x40 [ 717.617057] ? copy_mount_options+0x26f/0x380 [ 717.622383] ksys_mount+0xcf/0x130 [ 717.625989] __x64_sys_mount+0xba/0x150 [ 717.630701] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.635333] do_syscall_64+0xf9/0x620 [ 717.639210] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.645428] RIP: 0033:0x445b2a [ 717.648739] Code: Bad RIP value. [ 717.652934] RSP: 002b:00007fff072a2708 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 717.661871] RAX: ffffffffffffffda RBX: 00007fff072a2760 RCX: 0000000000445b2a [ 717.669179] RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fff072a2720 [ 717.677251] RBP: 00007fff072a2720 R08: 00007fff072a2760 R09: 0000000000000000 [ 717.685193] R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200003f8 [ 717.693470] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 [ 717.701355] [ 717.701355] Showing all locks held in the system: [ 717.707823] 1 lock held by khungtaskd/1571: [ 717.713046] #0: 0000000024d12f41 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.722200] 1 lock held by in:imklog/7814: [ 717.726428] #0: 000000001a9b0a5a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 717.735357] 1 lock held by syz-executor066/8143: [ 717.740897] #0: 000000006b47d9eb (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x20b/0xcd0 [ 717.750595] [ 717.752223] ============================================= [ 717.752223] [ 717.759222] NMI backtrace for cpu 0 [ 717.762980] CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.195-syzkaller #0 [ 717.770426] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.779955] Call Trace: [ 717.782541] dump_stack+0x1fc/0x2ef [ 717.786207] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.790715] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.795333] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 717.800687] watchdog+0x991/0xe60 [ 717.804135] ? reset_hung_task_detector+0x30/0x30 [ 717.808968] kthread+0x33f/0x460 [ 717.812323] ? kthread_park+0x180/0x180 [ 717.816297] ret_from_fork+0x24/0x30 [ 717.820123] Sending NMI from CPU 0 to CPUs 1: [ 717.825119] NMI backtrace for cpu 1 [ 717.825126] CPU: 1 PID: 4687 Comm: systemd-journal Not tainted 4.19.195-syzkaller #0 [ 717.825132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.825137] RIP: 0010:__lock_acquire+0x163/0x3ff0 [ 717.825147] Code: 0f 85 9a 2b 00 00 48 83 3d 89 8b a6 08 00 0f 84 a7 0e 00 00 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 f0 0c 00 00 8b 3d 0d da ab 08 <85> ff 75 73 45 31 ff 83 fe 01 0f 86 98 00 00 00 31 d2 4c 89 f7 e8 [ 717.825151] RSP: 0018:ffff8880a1307cb0 EFLAGS: 00000046 [ 717.825159] RAX: 0000000000000086 RBX: 0000000000000000 RCX: 0000000000000002 [ 717.825164] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 717.825170] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000001 [ 717.825175] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000 [ 717.825180] R13: ffff8880a12fc440 R14: ffffffff89f85ee0 R15: 0000000000000000 [ 717.825185] FS: 00007fc0f489e8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 717.825190] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 717.825195] CR2: 00007fc0f1c6f000 CR3: 00000000a1360000 CR4: 00000000001406e0 [ 717.825200] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 717.825205] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 717.825208] Call Trace: [ 717.825212] ? __seccomp_filter+0xe4/0xca0 [ 717.825216] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 717.825220] ? __se_sys_copy_file_range+0x410/0x410 [ 717.825224] ? fsnotify_first_mark+0x200/0x200 [ 717.825228] ? fsnotify+0x84e/0xe10 [ 717.825232] ? mark_held_locks+0xf0/0xf0 [ 717.825236] ? fsnotify_first_mark+0x200/0x200 [ 717.825240] ? security_file_permission+0x1c0/0x220 [ 717.825244] ? __secure_computing+0x104/0x360 [ 717.825248] ? syscall_trace_enter+0x3b7/0xd60 [ 717.825251] lock_acquire+0x170/0x3c0 [ 717.825255] ? get_task_pid+0x2a0/0x2a0 [ 717.825259] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.825263] __task_pid_nr_ns+0x3d/0x4c0 [ 717.825267] ? get_task_pid+0x2a0/0x2a0 [ 717.825271] __ia32_sys_getpid+0x1a/0x20 [ 717.825274] do_syscall_64+0xf9/0x620 [ 717.825278] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.825282] RIP: 0033:0x7fc0f3b36f17 [ 717.825292] Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 [ 717.825296] RSP: 002b:00007ffc2bfac488 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 [ 717.825305] RAX: ffffffffffffffda RBX: 000055eb2223b1e0 RCX: 00007fc0f3b36f17 [ 717.825310] RDX: 00007ffc2bfac540 RSI: 0000000000000000 RDI: 000055eb2223b1e0 [ 717.825315] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 717.825321] R10: 0000000000000069 R11: 0000000000000202 R12: 00007ffc2bfac540 [ 717.825326] R13: 000000000000124f R14: 00007ffc2bfaf330 R15: 00007ffc2bfac940 [ 717.825636] Kernel panic - not syncing: hung_task: blocked tasks [ 718.105084] CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.195-syzkaller #0 [ 718.112556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.122220] Call Trace: [ 718.124805] dump_stack+0x1fc/0x2ef [ 718.128421] panic+0x26a/0x50e [ 718.131596] ? __warn_printk+0xf3/0xf3 [ 718.135464] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.139947] ? ___preempt_schedule+0x16/0x18 [ 718.144340] ? watchdog+0x991/0xe60 [ 718.147946] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.153398] watchdog+0x9a2/0xe60 [ 718.156996] ? reset_hung_task_detector+0x30/0x30 [ 718.161839] kthread+0x33f/0x460 [ 718.165314] ? kthread_park+0x180/0x180 [ 718.169451] ret_from_fork+0x24/0x30 [ 718.174507] Kernel Offset: disabled [ 718.178156] Rebooting in 86400 seconds..