INFO: task syz.2.3361:14593 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.2.3361      state:D stack:27432 pid:14593 tgid:14592 ppid:13179  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 write_versions+0x95/0xe30
 nfsctl_transaction_write+0x10f/0x160
 vfs_write+0x296/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fefdcd9e159
RSP: 002b:00007fefdaff6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fefdd025fa0 RCX: 00007fefdcd9e159
RDX: 0000000000000005 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007fefdce3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fefdd026038 R14: 00007fefdd025fa0 R15: 00007ffdf7b18408
 </TASK>
INFO: task syz.2.3361:14594 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.2.3361      state:D stack:27432 pid:14594 tgid:14592 ppid:13179  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 write_threads+0x3b1/0x610
 nfsctl_transaction_write+0x10f/0x160
 vfs_write+0x296/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fefdcd9e159
RSP: 002b:00007fefdafd5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fefdd026090 RCX: 00007fefdcd9e159
RDX: 0000000000000002 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007fefdce3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fefdd026128 R14: 00007fefdd026090 R15: 00007ffdf7b18408
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/34: 1, last CPU#1:
 #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by getty/5425: 2, on CPU#0:
 #0: ffff88817ab7a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034832e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
locks held by syz.3.3298/14449: 4, on CPU#1:
 #0: ffff8881114d38f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff8881a69dc460 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #2: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: write_threads+0x3b1/0x610
 #3: ffffffff8f0b25c0 (nlmsvc_mutex){+.+.}-{4:4}, at: lockd_up+0x83/0x9c0
locks held by syz.2.3361/14593: 3, on CPU#1:
 #0: ffff888178e87af0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff88817a110460 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #2: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: write_versions+0x95/0xe30
locks held by syz.2.3361/14594: 3, on CPU#0:
 #0: ffff8881108238f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff88817a110460 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #2: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: write_threads+0x3b1/0x610
locks held by syz-executor/14750: 4, last CPU#1:
 #0: ffffffff8ee35c10 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x10f/0x480
 #1: ffff88817ac229f8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x195/0x1dc0
 #2: ffff88817ac2f678 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x221/0x1dc0
 #3: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240
locks held by kworker/u10:13/16958: 2, on CPU#1:
 #0: ffff8881000ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90007717c40 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
locks held by kworker/u10:14/16961: 2, on CPU#1:
 #0: ffff8881000ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90007707c40 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
locks held by syz.0.5344/19733: 1, last CPU#0:
 #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: filemap_remove_folio+0xdb/0x3a0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 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+0x17d/0x390
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19733 Comm: syz.0.5344 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:mark_lock+0x1/0x190
Code: 0f b9 3a 90 41 89 e9 48 89 df 48 8b 2c 24 e9 b6 fd ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 41 55 41 54 53 48 8b 46 20 89 c1 81 e1 00 00 03 00 48
RSP: 0000:ffffc9000844f0d0 EFLAGS: 00000046
RAX: 1b0000000004008b RBX: ffff888177f69e00 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffff888177f6a9b0 RDI: ffff888177f69e00
RBP: 0000000000000003 R08: 1b00000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888113dff478 R12: ffffffffffffff05
R13: 0000000000000000 R14: ffff888177f6a9b0 R15: 0000000000000000
FS:  00007f7344ff96c0(0000) GS:ffff88818d6da000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed1cff8 CR3: 000000000eb48000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __lock_acquire+0x9ee/0x2e50
 lock_acquire+0x115/0x350
 _raw_spin_lock+0x2e/0x40
 filemap_remove_folio+0xdb/0x3a0
 truncate_inode_folio+0x5d/0x70
 shmem_undo_range+0x3fb/0x15d0
 shmem_evict_inode+0x247/0xae0
 evict+0x624/0xb50
 dentry_kill+0x1b9/0x880
 finish_dput+0x1a/0x260
 __fput+0x675/0xa50
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 irqentry_exit+0x2ba/0x910
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f734419e161
Code: Unable to access opcode bytes at 0x7f734419e137.
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f7344426090 RCX: 00007f734419e159
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f734423506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f7344426128 R14: 00007f7344426090 R15: 00007ffe835b3f68
 </TASK>
