INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. executing program INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 533.078428] random: crng init done [ 613.539576] INFO: task syzkaller684233:3852 blocked for more than 120 seconds. [ 613.546963] Not tainted 4.9.84-ga9d0273 #44 [ 613.551910] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.559898] syzkaller684233 D28224 3852 3850 0x00000000 [ 613.565673] ffff8801d711c800 0000000000000000 ffff8801d8abb480 ffff8801d9b73000 [ 613.573705] ffff8801db321b98 ffff8801d50a7a70 ffffffff838a438b ffff8801d711c800 [ 613.581734] ffffffff8114529a 00fffc0000000000 ffff8801db322468 ffff8801db322490 [ 613.589719] Call Trace: [ 613.592341] [] ? __schedule+0x67b/0x1ba0 [ 613.598057] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 613.604362] [] schedule+0x7f/0x1b0 [ 613.609829] [] __lock_sock+0x13c/0x260 [ 613.615337] [] ? proto_unregister+0x370/0x370 [ 613.621495] [] ? prepare_to_wait_event+0x450/0x450 [ 613.628047] [] lock_sock_nested+0xf6/0x120 [ 613.633939] [] ipv6_getorigdst+0x136/0x610 [ 613.639810] [] ? ipv6_print_tuple+0x30/0x30 [ 613.645748] [] ? __ww_mutex_lock+0x14a0/0x14a0 [ 613.651963] [] ? mark_held_locks+0xaf/0x100 [ 613.657902] [] ? mutex_unlock+0x9/0x10 [ 613.663455] [] ? nf_sockopt_find.constprop.0+0x1a7/0x220 [ 613.670539] [] nf_getsockopt+0x6a/0xc0 [ 613.676062] [] ipv6_getsockopt+0x1ce/0x250 [ 613.681932] [] ? do_ipv6_getsockopt.isra.5+0x2160/0x2160 [ 613.689018] [] tcp_getsockopt+0x82/0xd0 [ 613.694631] [] sock_common_getsockopt+0x95/0xd0 [ 613.700927] [] SyS_getsockopt+0x14a/0x230 [ 613.706693] [] ? SyS_setsockopt+0x250/0x250 [ 613.712707] [] ? __do_page_fault+0x3bd/0xd40 [ 613.718755] [] ? do_syscall_64+0x48/0x490 [ 613.724556] [] ? SyS_setsockopt+0x250/0x250 [ 613.730517] [] do_syscall_64+0x1a4/0x490 [ 613.736199] [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 [ 613.743110] [ 613.743110] Showing all locks held in the system: [ 613.749410] 2 locks held by khungtaskd/514: [ 613.753713] #0: (rcu_read_lock){......}, at: [] watchdog+0x125/0xa70 [ 613.762413] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x70/0x280 [ 613.772073] 2 locks held by getty/3776: [ 613.776031] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.785324] #1: (&ldata->atomic_read_lock){+.+.+.}, at: [] n_tty_read+0x1f4/0x16c0 [ 613.795246] 1 lock held by syzkaller684233/3852: [ 613.799982] #0: (sk_lock-AF_INET6){+.+...}, at: [] ipv6_getsockopt+0x1b3/0x250 [ 613.809528] [ 613.811127] ============================================= [ 613.811127] [ 613.818106] NMI backtrace for cpu 1 [ 613.821717] CPU: 1 PID: 514 Comm: khungtaskd Not tainted 4.9.84-ga9d0273 #44 [ 613.828872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.838197] ffff8801d86b7d00 ffffffff81d956b9 0000000000000000 0000000000000001 [ 613.846165] 0000000000000001 0000000000000001 ffffffff810bb190 ffff8801d86b7d38 [ 613.854137] ffffffff81da07dd 0000000000000001 0000000000000000 ffff8801d711cc18 [ 613.862104] Call Trace: [ 613.864691] [] dump_stack+0xc1/0x128 [ 613.870037] [] ? irq_force_complete_move+0x390/0x390 [ 613.876759] [] nmi_cpu_backtrace+0xfd/0x120 [ 613.882696] [] ? irq_force_complete_move+0x390/0x390 [ 613.889417] [] nmi_trigger_cpumask_backtrace+0x117/0x190 [ 613.896483] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 613.903464] [] watchdog+0x6f0/0xa70 [ 613.908706] [] ? watchdog+0x125/0xa70 [ 613.914154] [] kthread+0x26d/0x300 [ 613.919312] [] ? reset_hung_task_detector+0x20/0x20 [ 613.925942] [] ? kthread_park+0xa0/0xa0 [ 613.931546] [] ? kthread_park+0xa0/0xa0 [ 613.937136] [] ? kthread_park+0xa0/0xa0 [ 613.942727] [] ret_from_fork+0x5c/0x70 [ 613.948283] Sending NMI from CPU 1 to CPUs 0: [ 613.952788] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff838b4076 [ 613.960031] Kernel panic - not syncing: hung_task: blocked tasks [ 613.966157] CPU: 1 PID: 514 Comm: khungtaskd Not tainted 4.9.84-ga9d0273 #44 [ 613.973307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.982629] ffff8801d86b7cb8 ffffffff81d956b9 ffffffff83a8b2a0 ffff8801d86b7d90 [ 613.990599] ffff8801d711cc00 dffffc0000000000 ffffffff84409000 ffff8801d86b7d80 [ 613.998584] ffffffff8142f571 0000000041b58ab3 ffffffff8418b2c0 ffffffff8142f3b5 [ 614.006546] Call Trace: [ 614.009105] [] dump_stack+0xc1/0x128 [ 614.014471] [] panic+0x1bc/0x3a8 [ 614.019456] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 614.027652] [] ? nmi_trigger_cpumask_backtrace+0x13b/0x190 [ 614.034891] [] ? nmi_trigger_cpumask_backtrace+0x145/0x190 [ 614.042134] [] watchdog+0x701/0xa70 [ 614.047387] [] ? watchdog+0x125/0xa70 [ 614.052803] [] kthread+0x26d/0x300 [ 614.057957] [] ? reset_hung_task_detector+0x20/0x20 [ 614.064589] [] ? kthread_park+0xa0/0xa0 [ 614.070192] [] ? kthread_park+0xa0/0xa0 [ 614.075792] [] ? kthread_park+0xa0/0xa0 [ 614.081385] [] ret_from_fork+0x5c/0x70 [ 614.087381] Dumping ftrace buffer: [ 614.090908] (ftrace buffer empty) [ 614.094586] Kernel Offset: disabled [ 614.098189] Rebooting in 86400 seconds..