INFO: task syz-executor:4271 blocked for more than 143 seconds.
Not tainted 6.1.142-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21472 pid:4271 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
io_schedule+0x7c/0xd0 kernel/sched/core.c:8797
folio_wait_bit_common+0x6e1/0xf60 mm/filemap.c:1324
truncate_inode_pages_range+0x9a2/0xff0 mm/truncate.c:422
evict+0x498/0x870 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x604/0x690 fs/inode.c:792
generic_shutdown_super+0x93/0x340 fs/super.c:480
kill_block_super+0x7c/0xe0 fs/super.c:1470
deactivate_locked_super+0x93/0xf0 fs/super.c:332
cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fab9778fc57
RSP: 002b:00007fff318797f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fab97810925 RCX: 00007fab9778fc57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff318798b0
RBP: 00007fff318798b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff3187a940
R13: 00007fab97810925 R14: 00000000000423db R15: 00007fff3187a980
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b430 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2bc50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by kworker/0:2/129:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90002db7d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
2 locks held by getty/4027:
#0: ffff88814d1fc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4271:
#0: ffff88801b2a80e0 (&type->s_umount_key#114){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
2 locks held by syz-executor/10715:
#0: ffff8880546780e0 (&type->s_umount_key#79){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
#1: ffffffff8cb30778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8cb30778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x830 kernel/rcu/tree_exp.h:962
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10715 Comm: syz-executor Not tainted 6.1.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__hlist_del include/linux/list.h:882 [inline]
RIP: 0010:hlist_del include/linux/list.h:898 [inline]
RIP: 0010:__alloc_object lib/debugobjects.c:214 [inline]
RIP: 0010:alloc_object+0x313/0x650 lib/debugobjects.c:250
Code: da e8 12 4d 85 ff 0f 84 8f 01 00 00 48 89 54 24 50 4d 89 fe 49 c1 ee 03 41 80 3c 2e 00 74 08 4c 89 ff e8 c0 05 c6 fd 49 8b 1f <4d> 8d 67 08 4d 89 e5 49 c1 ed 03 41 80 7c 2d 00 00 74 08 4c 89 e7
RSP: 0018:ffffc9000cc0f378 EFLAGS: 00000046
RAX: 0000000000008269 RBX: ffff8880470d9ab8 RCX: dffffc0000000000
RDX: 000000000000000b RSI: 0000000000000004 RDI: ffffc9000cc0f300
RBP: dffffc0000000000 R08: 0000000000000004 R09: 0000000000000003
R10: fffff52001981e60 R11: 1ffff92001981e60 R12: ffff888045fd9508
R13: 1ffff11004ce4bd6 R14: 1ffff1100f7045a4 R15: ffff88807b822d20
FS: 0000555578538500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555773395c8 CR3: 0000000043c41000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lookup_object_or_alloc lib/debugobjects.c:588 [inline]
debug_object_activate+0x13e/0x490 lib/debugobjects.c:700
debug_rcu_head_queue kernel/rcu/rcu.h:190 [inline]
call_rcu+0x9e/0x970 kernel/rcu/tree.c:2830
xa_node_free lib/xarray.c:260 [inline]
xas_delete_node lib/xarray.c:497 [inline]
update_node lib/xarray.c:761 [inline]
xas_store+0xe35/0x19e0 lib/xarray.c:846
page_cache_delete mm/filemap.c:140 [inline]
__filemap_remove_folio+0x47f/0x860 mm/filemap.c:223
filemap_remove_folio+0xed/0x2c0 mm/filemap.c:255
truncate_inode_folio+0x59/0x70 mm/truncate.c:195
shmem_undo_range+0x4d2/0x2050 mm/shmem.c:942
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x248/0xa40 mm/shmem.c:1171
evict+0x485/0x870 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfa/0x1d0 fs/dcache.c:918
__fput+0x5e0/0x920 fs/file_table.c:328
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f567c38fc57
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd83b37cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f567c410925 RCX: 00007f567c38fc57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd83b37db0
RBP: 00007ffd83b37db0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd83b38e40
R13: 00007f567c410925 R14: 0000000000065f79 R15: 00007ffd83b38e80