INFO: task syz-executor:5781 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20848 pid:5781 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
io_schedule+0x80/0xd0 kernel/sched/core.c:9022
folio_wait_bit_common+0x6eb/0xf70 mm/filemap.c:1329
__filemap_get_folio+0xbc/0xbc0 mm/filemap.c:1910
truncate_inode_pages_range+0x40a/0xf00 mm/truncate.c:376
evict+0x499/0x870 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x5fe/0x690 fs/inode.c:792
generic_shutdown_super+0x97/0x2b0 fs/super.c:672
kill_block_super+0x44/0x90 fs/super.c:1660
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250
task_work_run+0x1ce/0x250 kernel/task_work.c:239
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:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4b5b58ff17
RSP: 002b:00007ffd6e1875e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4b5b611c05 RCX: 00007f4b5b58ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd6e1876a0
RBP: 00007ffd6e1876a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd6e188730
R13: 00007f4b5b611c05 R14: 00000000000375f2 R15: 00007ffd6e188770
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cd2fbe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2fbe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2fbe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by kworker/u4:2/42:
#0: ffff888142a8d538 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#0: ffff888142a8d538 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
#1: ffffc90000b2fd00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
#1: ffffc90000b2fd00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
2 locks held by kworker/u4:6/1136:
2 locks held by dhcpcd/5450:
#0: ffff888018efc688 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0xf4/0x810 net/netlink/af_netlink.c:2336
#1: ffffffff8dfbc348 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x71f/0xde0 net/netlink/af_netlink.c:2263
2 locks held by getty/5546:
#0: ffff88803131a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
1 lock held by syz-executor/5781:
#0: ffff8880537b00e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880537b00e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880537b00e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/5779:
#0: ffff8880609ce0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880609ce0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880609ce0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/6615:
#0: ffff888030c440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888030c440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888030c440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/7252:
#0: ffff88805ee880e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805ee880e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805ee880e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/7971:
#0: ffff88801fb440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88801fb440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88801fb440e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/8595:
#0: ffff8880438420e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880438420e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880438420e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/8762:
#0: ffff88802c1d40e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802c1d40e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802c1d40e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/8866:
#0: ffff8880253580e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880253580e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880253580e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz-executor/9363:
#0: ffff88804b53a0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804b53a0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804b53a0e0 (&type->s_umount_key#118){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
2 locks held by syz-executor/9819:
#0: ffffffff8dfbc348 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline]
#0: ffffffff8dfbc348 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x76f/0xf10 net/core/rtnetlink.c:6472
#1: ffffffff8cd35bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8cd35bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x448/0x830 kernel/rcu/tree_exp.h:1004
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 54 Comm: kworker/1:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events __sched_core_put
RIP: 0010:__bfs kernel/locking/lockdep.c:1799 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1844 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2804 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3138 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3253 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3869 [inline]
RIP: 0010:__lock_acquire+0x3634/0x7c80 kernel/locking/lockdep.c:5137
Code: 00 74 12 4c 89 ff e8 3b 9a 75 00 48 ba 00 00 00 00 00 fc ff df 4d 8b 3f 4c 89 6c 24 30 4d 39 f7 75 0d e9 88 fb ff ff 4d 8b 3f <4d> 39 f7 74 45 49 8d 7f 30 48 89 f8 48 c1 e8 03 80 3c 10 00 74 0f
RSP: 0018:ffffc90000bf7280 EFLAGS: 00000046
RAX: 1ffffffff26d0eef RBX: ffffffff93769688 RCX: 0000000000000104
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff936877a8
RBP: ffffc90000bf74c8 R08: ffffc90000bf7457 R09: 0000000000000000
R10: ffffc90000bf7420 R11: fffff5200017ee8b R12: ffffffff92df0318
R13: 00000000000003dd R14: ffffffff9071af50 R15: ffffffff93693c58
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff5b594198 CR3: 000000000cb30000 CR4: 00000000003506e0
Call Trace:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
do_write_seqcount_begin_nested include/linux/seqlock.h:515 [inline]
do_write_seqcount_begin include/linux/seqlock.h:541 [inline]
psi_write_begin kernel/sched/psi.c:179 [inline]
psi_task_switch+0x10f/0x970 kernel/sched/psi.c:940
psi_sched_switch kernel/sched/stats.h:189 [inline]
__schedule+0x20ee/0x44d0 kernel/sched/core.c:6694
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
class_preempt_destructor include/linux/preempt.h:478 [inline]
try_to_wake_up+0x756/0x1140 kernel/sched/core.c:4355
wake_up_process kernel/sched/core.c:4480 [inline]
wake_up_q+0xb6/0x100 kernel/sched/core.c:1031
__mutex_unlock_slowpath+0x40a/0x6a0 kernel/locking/mutex.c:951
static_key_disable+0x1a/0x20 kernel/jump_label.c:245
__sched_core_disable kernel/sched/core.c:411 [inline]
__sched_core_put+0xef/0x120 kernel/sched/core.c:431
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293