INFO: task syz-executor:4269 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:20992 pid:4269 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 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: 0033:0x7fc2a678ff17
RSP: 002b:00007ffec87963a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc2a6811c05 RCX: 00007fc2a678ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec8796460
RBP: 00007ffec8796460 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffec87974f0
R13: 00007fc2a6811c05 R14: 0000000000020b8a R15: 00007ffec8797530
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b370 (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: ffffffff8cb2bb90 (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/28:
#0: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4030:
#0: ffff88814d221098 (&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/4269:
#0: ffff88814275e0e0 (&type->s_umount_key#83){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
4 locks held by syz-executor/9992:
#0: ffff8880b8e3aa98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b8e27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x398/0x6d0 kernel/sched/psi.c:999
#2: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#2: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#2: ffffffff8cb2a9e0 (rcu_read_lock){....}-{1:2}, at: folio_memcg_lock+0x85/0x2e0 mm/memcontrol.c:2101
#3: ffff88813fe107f0 (&memcg->move_lock){..-.}-{2:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#3: ffff88813fe107f0 (&memcg->move_lock){..-.}-{2:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#3: ffff88813fe107f0 (&memcg->move_lock){..-.}-{2:2}, at: folio_memcg_lock+0x85/0x2e0 mm/memcontrol.c:2101
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 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+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: 7150 Comm: kworker/u4:9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: phy11 ieee80211_iface_work
RIP: 0010:freelist_dereference mm/slub.c:374 [inline]
RIP: 0010:get_freepointer mm/slub.c:381 [inline]
RIP: 0010:slab_free_freelist_hook+0xaa/0x1a0 mm/slub.c:1747
Code: 49 89 f7 48 c7 06 00 00 00 00 48 c7 02 00 00 00 00 eb 11 48 8b 04 24 ff 08 48 3b 6c 24 10 0f 84 d3 00 00 00 4c 89 f5 8b 43 28 <4d> 8b 34 06 0f 1f 44 00 00 45 31 e4 8b 73 1c 48 89 ef e8 6f 0f 93
RSP: 0018:ffffc90003c57a78 EFLAGS: 00000202
RAX: 0000000000000100 RBX: ffff888017441c80 RCX: fffffffe1d4d8001
RDX: ffffc90003c57ad8 RSI: ffffc90003c57ae0 RDI: ffff888017441c80
RBP: ffff8880590d8000 R08: dffffc0000000000 R09: fffffbfff1c3ee26
R10: fffffbfff1c3ee26 R11: 1ffffffff1c3ee25 R12: ffffea0001643600
R13: ffffc90003c57ad8 R14: ffff8880590d8000 R15: ffffc90003c57ae0
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44ae7f6000 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3674
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x5db/0x7c0 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
kfree_skb_reason+0x163/0x370 net/core/skbuff.c:893
kfree_skb include/linux/skbuff.h:1220 [inline]
ieee80211_iface_work+0x7b3/0xc80 net/mac80211/iface.c:1727
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
vkms_vblank_simulate: vblank timer overrun