INFO: task syz.7.15732:26562 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.15732     state:D stack:28760 pid:26562 tgid:26558 ppid:23942  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x899/0x1040
 down_write_nested+0x1c6/0x210
 __start_renaming+0x148/0x410
 do_renameat2+0x3c9/0x900
 __x64_sys_rename+0x82/0x90
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcc259acb9
RSP: 002b:00007fbcc34b5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fbcc2816090 RCX: 00007fbcc259acb9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000200000000580
RBP: 00007fbcc2608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbcc2816128 R14: 00007fbcc2816090 R15: 00007ffed1257088
 </TASK>
INFO: task syz.7.15732:26563 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.15732     state:D stack:28600 pid:26563 tgid:26558 ppid:23942  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 lookup_slow+0x46/0x70
 link_path_walk+0xd1e/0x18d0
 __filename_parentat+0x27f/0x6f0
 do_unlinkat+0x105/0x590
 __x64_sys_unlinkat+0xd3/0xf0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcc259acb9
RSP: 002b:00007fbcc3494028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007fbcc2816180 RCX: 00007fbcc259acb9
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007fbcc2608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbcc2816218 R14: 00007fbcc2816180 R15: 00007ffed1257088
 </TASK>
INFO: task syz.7.15732:26564 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.15732     state:D stack:24952 pid:26564 tgid:26558 ppid:23942  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 lookup_slow+0x46/0x70
 link_path_walk+0xd1e/0x18d0
 __filename_parentat+0x27f/0x6f0
 do_unlinkat+0x105/0x590
 __x64_sys_unlinkat+0xd3/0xf0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcc259acb9
RSP: 002b:00007fbcc3473028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007fbcc2816270 RCX: 00007fbcc259acb9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007fbcc2608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbcc2816308 R14: 00007fbcc2816270 R15: 00007ffed1257088
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5666:
 #0: ffff88817308c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
4 locks held by kworker/u8:4/5867:
 #0: ffff888100ef7948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90005617bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f79bb10 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xfe/0x7b0
 #3: ffffffff8e360c78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
5 locks held by kworker/1:10/18586:
 #0: ffff88823c63a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88823c624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff88823c628ec8 (lock#7){..-.}-{3:3}, at: kcov_remote_stop+0x69/0x6b0
 #3: ffffffff8e3b5318 (kcov_remote_lock){..-.}-{3:3}, at: kcov_remote_stop+0x3b6/0x6b0
 #4: ffff88816e25c098 (&hub->status_mutex){+.+.}-{4:4}, at: hub_ext_port_status+0x53/0x820
4 locks held by kworker/u9:34/12940:
 #0: ffff8881604ea148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900078dfbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffff88810cb9c0e0 (&type->s_umount_key#89){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff888025e30af0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
1 lock held by udevd/17804:
 #0: ffffffff8e360c78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
4 locks held by syz.7.15732/26559:
2 locks held by syz.7.15732/26562:
 #0: ffff88810cb9c420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888025e30ea0 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: __start_renaming+0x148/0x410
1 lock held by syz.7.15732/26563:
 #0: ffff888025e30ea0 (&type->i_mutex_dir_key#22){++++}-{4:4}, at: lookup_slow+0x46/0x70
1 lock held by syz.7.15732/26564:
 #0: ffff888025e30ea0 (&type->i_mutex_dir_key#22){++++}-{4:4}, at: lookup_slow+0x46/0x70

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18953 Comm: ipvs-e:13:0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__debug_object_init+0xb2/0x4e0
Code: f7 e8 c2 16 87 fd 4d 8b 2e 45 31 e4 eb 07 4d 8b 6d 00 41 ff c4 4d 85 ed 74 3c 49 8d 6d 18 48 89 e8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 ef e8 94 16 87 fd 48 39 5d 00 0f 84 b5 00 00 00 4c 89
RSP: 0018:ffffc90009347928 EFLAGS: 00000046
RAX: 1ffff1102171d21f RBX: ffffc90009347a00 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90009347880
RBP: ffff88810b8e90f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001268f10 R12: 0000000000000004
R13: ffff88810b8e90e0 R14: ffffffff99fc3788 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8882a9924000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001034 CR3: 000000000e146000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 timer_init_key_on_stack+0x3c/0x110
 schedule_timeout+0x146/0x2c0
 ip_vs_estimation_kthread+0x2ae7/0x3a80
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
