INFO: task syz.8.968:14323 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.968       state:D stack:28808 pid:14323 tgid:14308 ppid:13605  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 path_openat+0x8da/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_open+0x11e/0x150
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f338e38ebe9
RSP: 002b:00007f338c5d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f338e5c6180 RCX: 00007f338e38ebe9
RDX: 0000000000000086 RSI: 0000000000064842 RDI: 0000200000000ec0
RBP: 00007f338e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f338e5c6218 R14: 00007f338e5c6180 R15: 00007fffaa5d4128
 </TASK>
INFO: task syz.8.968:14324 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.968       state:D stack:27576 pid:14324 tgid:14308 ppid:13605  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 path_openat+0x8cb/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f338e38ebe9
RSP: 002b:00007f338c1b2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f338e5c6270 RCX: 00007f338e38ebe9
RDX: 0000000000101101 RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007f338e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000013b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f338e5c6308 R14: 00007f338e5c6270 R15: 00007fffaa5d4128
 </TASK>
INFO: task syz.8.968:14325 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.968       state:D stack:24648 pid:14325 tgid:14308 ppid:13605  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 path_openat+0x8da/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f338e38ebe9
RSP: 002b:00007f338bd8f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f338e5c6360 RCX: 00007f338e38ebe9
RDX: 0000000000143041 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f338e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f338e5c63f8 R14: 00007f338e5c6360 R15: 00007fffaa5d4128
 </TASK>
INFO: task syz.8.968:14330 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.968       state:D stack:25128 pid:14330 tgid:14308 ppid:13605  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 do_unlinkat+0x1c7/0x560
 __x64_sys_unlink+0x47/0x50
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f338e38ebe9
RSP: 002b:00007f338b96c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f338e5c6450 RCX: 00007f338e38ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f338e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f338e5c64e8 R14: 00007f338e5c6450 R15: 00007fffaa5d4128
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u9:6/1092:
 #0: ffff88801d6ce148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006df7bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8880296600e0 (&type->s_umount_key#102){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff888034384250 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
2 locks held by getty/5671:
 #0: ffff88801fbc50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
4 locks held by syz.8.968/14309:
2 locks held by syz.8.968/14323:
 #0: ffff888029660428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888034384600 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: path_openat+0x8da/0x3830
2 locks held by syz.8.968/14324:
 #0: ffff888029660428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888034384600 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: path_openat+0x8cb/0x3830
2 locks held by syz.8.968/14325:
 #0: ffff888029660428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888034384600 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: path_openat+0x8da/0x3830
2 locks held by syz.8.968/14330:
 #0: ffff888029660428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888034384600 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: do_unlinkat+0x1c7/0x560
1 lock held by syz-executor/16144:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
1 lock held by syz.7.1231/16702:
1 lock held by syz.9.1230/16718:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 16718 Comm: syz.9.1230 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0xd0/0xd20
Code: 8b 0d 84 71 0e 18 8b 97 e8 0a 00 00 85 c9 0f 94 c1 83 fa 30 40 0f 93 c6 40 20 ce 40 80 fe 01 0f 84 30 01 00 00 44 89 74 24 1c <89> 6c 24 10 44 8b b4 24 88 00 00 00 8b 6c 24 78 41 89 d5 48 c7 c1
RSP: 0018:ffffc900033bf368 EFLAGS: 00000097
RAX: ffffffff93494888 RBX: ffffffff8e139f20 RCX: 0000000000000001
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88810afe1cc0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffff94000167d39 R12: 0000000000000002
R13: ffffffff8e139f20 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f7611fd76c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f30fff8 CR3: 0000000038330000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360
 __lruvec_stat_mod_folio+0x95/0x2f0
 filemap_unaccount_folio+0x319/0x790
 __filemap_remove_folio+0xc3/0x500
 filemap_remove_folio+0xe6/0x1f0
 truncate_inode_folio+0x5d/0x70
 shmem_undo_range+0x3a9/0x14b0
 shmem_evict_inode+0x272/0xa70
 evict+0x504/0x9c0
 __dentry_kill+0x209/0x660
 dput+0x19f/0x2b0
 __fput+0x68e/0xa70
 fput_close_sync+0x119/0x200
 __x64_sys_close+0x7f/0x110
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f761118d84a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007f7611fd6e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f761118d84a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000005a4b
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005
R13: 00007f7611fd6ef0 R14: 00007f7611fd6eb0 R15: 00007f7606e00000
 </TASK>
