INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program [ 859.524940] INFO: task syz-executor235:3915 blocked for more than 140 seconds. [ 859.533528] Not tainted 4.9.113-g47bbcd6 #10 [ 859.539561] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.547613] syz-executor235 D29088 3915 3911 0x00000004 [ 859.553364] ffff8801d7c8b000 0000000000000000 ffff8801bc071f80 ffff8801d9a6b000 [ 859.561474] ffff8801db321c18 ffff8801d6e0fac8 ffffffff839e909d ffffffff81235647 [ 859.570761] 0000000000000000 ffff8801d7c8b8c0 0000000600000007 ffff8801db3224e8 [ 859.579850] Call Trace: [ 859.582500] [] ? __schedule+0x64d/0x1bd0 [ 859.588328] [] ? mark_held_locks+0xc7/0x130 [ 859.594295] [] schedule+0x7f/0x1b0 [ 859.599581] [] rwsem_down_write_failed+0x598/0x990 [ 859.606310] [] ? rwsem_down_write_failed+0x18c/0x990 [ 859.613094] [] ? unlazy_walk+0x3a6/0x980 [ 859.618891] [] ? rwsem_down_write_failed_killable+0xb40/0xb40 [ 859.626497] [] ? debug_check_no_locks_freed+0x210/0x210 [ 859.633498] [] ? __lock_is_held+0xa2/0xf0 [ 859.639414] [] call_rwsem_down_write_failed+0x17/0x30 [ 859.646320] [] down_write_nested+0x60/0xa0 [ 859.652192] [] ? filename_create+0x17a/0x490 [ 859.658328] [] filename_create+0x17a/0x490 [ 859.664200] [] ? __check_object_size+0x248/0x38e [ 859.671296] [] ? kern_path_mountpoint+0x70/0x70 [ 859.677717] [] ? strncpy_from_user+0x20d/0x2d0 [ 859.683942] [] ? getname_flags+0x23a/0x580 [ 859.689914] [] SyS_mkdirat+0xbb/0x260 [ 859.695418] [] ? SyS_mknod+0x420/0x420 [ 859.701066] [] ? do_syscall_64+0x48/0x490 [ 859.706938] [] ? SyS_mknod+0x420/0x420 [ 859.712466] [] do_syscall_64+0x1a6/0x490 [ 859.718250] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 859.725249] [ 859.725249] Showing all locks held in the system: [ 859.731574] 2 locks held by khungtaskd/520: [ 859.735897] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 859.744676] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 859.754445] 2 locks held by getty/3776: [ 859.758414] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 859.767755] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 859.777756] 2 locks held by syz-executor235/3915: [ 859.782574] #0: (sb_writers#8){.+.+.+}, at: [] mnt_want_write+0x3f/0xb0 [ 859.791704] #1: (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [] filename_create+0x17a/0x490 [ 859.802439] [ 859.804049] ============================================= [ 859.804049] [ 859.811936] NMI backtrace for cpu 0 [ 859.815570] CPU: 0 PID: 520 Comm: khungtaskd Not tainted 4.9.113-g47bbcd6 #10 [ 859.822961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.832385] ffff8801d8437d08 ffffffff81eb32a9 0000000000000000 0000000000000000 [ 859.840406] 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8437d40 [ 859.848707] ffffffff81ebe5a7 0000000000000000 0000000000000000 0000000000000003 [ 859.856739] Call Trace: [ 859.859315] [] dump_stack+0xc1/0x128 [ 859.864693] [] ? irq_force_complete_move+0x320/0x320 [ 859.871442] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 859.877919] [] ? irq_force_complete_move+0x320/0x320 [ 859.884663] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 859.891750] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 859.898747] [] watchdog+0x6b4/0xa20 [ 859.904006] [] ? watchdog+0x11c/0xa20 [ 859.909486] [] kthread+0x26d/0x300 [ 859.914665] [] ? reset_hung_task_detector+0x20/0x20 [ 859.921316] [] ? kthread_park+0xa0/0xa0 [ 859.926926] [] ? kthread_park+0xa0/0xa0 [ 859.932974] [] ? kthread_park+0xa0/0xa0 [ 859.938592] [] ret_from_fork+0x5c/0x70 [ 859.944211] Sending NMI from CPU 0 to CPUs 1: [ 859.949077] NMI backtrace for cpu 1 [ 859.952706] CPU: 1 PID: 3914 Comm: syz-executor235 Not tainted 4.9.113-g47bbcd6 #10 [ 859.960498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 859.969836] task: ffff8801d8539800 task.stack: ffff8801d7128000 [ 859.975881] RIP: 0010:[] c [] mark_held_locks+0xaa/0x130 [ 859.984517] RSP: 0018:ffff8801d712f7b0 EFLAGS: 00000093 [ 859.989940] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffff1003b0a741d [ 859.997193] RDX: 0000000000000002 RSI: ffff8801d853a0f0 RDI: ffff8801d853a112 [ 860.004444] RBP: ffff8801d712f7f0 R08: ffff8801d853a0e8 R09: 0000000000000000 [ 860.011699] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d853a0c8 [ 860.018946] R13: ffffed003b0a7418 R14: ffff8801d8539800 R15: dffffc0000000000 [ 860.026190] FS: 00007fe2f5e78700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 860.034395] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 860.040253] CR2: 00007fa2cf355000 CR3: 00000001b94e6000 CR4: 00000000001606f0 [ 860.047499] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 860.054755] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 860.062002] Stack: [ 860.064159] 0000000000000000c ffff8801d853a0c0c 0000000600000007c ffff8801d8539800c [ 860.072363] ffffffff839f969ac ffff8801d712f948c ffff8801ba8b6318c 0000000000000001c [ 860.080597] ffff8801d712f810c ffffffff81235a3bc 0000000000000296c ffff8801ba8b6318c [ 860.088809] Call Trace: [ 860.091454] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 860.098351] [] trace_hardirqs_on_caller+0x38b/0x590 [ 860.104989] [] trace_hardirqs_on+0xd/0x10 [ 860.110758] [] _raw_spin_unlock_irqrestore+0x5a/0x70 [ 860.117485] [] prepare_to_wait_event+0x1d9/0x450 [ 860.123862] [] ? wake_up_atomic_t+0x30/0x30 [ 860.129810] [] ? __might_sleep+0x95/0x1a0 [ 860.135584] [] request_wait_answer+0x22e/0x6e0 [ 860.142049] [] ? flush_bg_queue+0x2b0/0x2b0 [ 860.147997] [] ? prepare_to_wait_event+0x450/0x450 [ 860.154560] [] ? __fuse_request_send+0xfe/0x1b0 [ 860.160849] [] __fuse_request_send+0x109/0x1b0 [ 860.167056] [] fuse_request_send+0x5d/0x70 [ 860.173194] [] fuse_simple_request+0x2f4/0x660 [ 860.179401] [] fuse_lookup_name+0x253/0x5d0 [ 860.185348] [] ? fuse_valid_type+0x70/0x70 [ 860.191216] [] ? __lock_is_held+0xa2/0xf0 [ 860.196983] [] fuse_lookup+0xed/0x3a0 [ 860.202405] [] ? fuse_lookup_name+0x5d0/0x5d0 [ 860.208548] [] ? _raw_spin_unlock+0x2c/0x50 [ 860.214493] [] __lookup_hash+0x11c/0x190 [ 860.220175] [] filename_create+0x1a6/0x490 [ 860.226031] [] ? __check_object_size+0x248/0x38e [ 860.232406] [] ? kern_path_mountpoint+0x70/0x70 [ 860.238696] [] ? strncpy_from_user+0x20d/0x2d0 [ 860.244898] [] ? getname_flags+0x23a/0x580 [ 860.250858] [] SyS_mkdirat+0xbb/0x260 [ 860.256279] [] ? SyS_mknod+0x420/0x420 [ 860.261799] [] ? do_syscall_64+0x48/0x490 [ 860.267566] [] ? SyS_mknod+0x420/0x420 [ 860.273246] [] do_syscall_64+0x1a6/0x490 [ 860.278936] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 860.285860] Code: cc1 ced c03 c4d c01 cfd c48 c63 cc3 c48 c8d c04 c80 c49 c8d c34 cc4 c48 c8d c7e c22 c48 c89 cf8 c48 c89 cfa c48 cc1 ce8 c03 c83 ce2 c07 c42 c0f cb6 c04 c38 c38 cd0 c7f c04 c<84> cc0 c75 c5e c0f cb6 c46 c22 c8b c55 cd4 ca8 c03 c0f c45 c55 cd0 ca8 c04 c74 c0c c [ 860.317387] Kernel panic - not syncing: hung_task: blocked tasks [ 860.323648] CPU: 0 PID: 520 Comm: khungtaskd Not tainted 4.9.113-g47bbcd6 #10 [ 860.330905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 860.340254] ffff8801d8437cc8 ffffffff81eb32a9 ffffffff83c8bc20 00000000ffffffff [ 860.348313] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d8437d88 [ 860.356373] ffffffff81421a55 0000000041b58ab3 ffffffff843bb788 ffffffff81421896 [ 860.364399] Call Trace: [ 860.366978] [] dump_stack+0xc1/0x128 [ 860.372328] [] panic+0x1bf/0x3bc [ 860.377330] [] ? add_taint.cold.6+0x16/0x16 [ 860.383387] [] ? ___preempt_schedule+0x16/0x18 [ 860.389690] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 860.397046] [] watchdog+0x6c5/0xa20 [ 860.402308] [] ? watchdog+0x11c/0xa20 [ 860.407745] [] kthread+0x26d/0x300 [ 860.412917] [] ? reset_hung_task_detector+0x20/0x20 [ 860.419566] [] ? kthread_park+0xa0/0xa0 [ 860.425176] [] ? kthread_park+0xa0/0xa0 [ 860.430782] [] ? kthread_park+0xa0/0xa0 [ 860.436389] [] ret_from_fork+0x5c/0x70 [ 860.442605] Dumping ftrace buffer: [ 860.446173] (ftrace buffer empty) [ 860.449858] Kernel Offset: disabled [ 860.453467] Rebooting in 86400 seconds..