INFO: task syz.2.2087:17346 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller-00253-gcb82ca153949 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2087 state:D stack:23840 pid:17346 tgid:17346 ppid:15613 task_flags:0x440040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:228
do_sync_mmap_readahead+0x499/0x970
filemap_fault+0x8a9/0x1490 mm/filemap.c:3391
__do_fault+0x135/0x390 mm/memory.c:4989
do_shared_fault mm/memory.c:5473 [inline]
do_fault mm/memory.c:5547 [inline]
do_pte_missing mm/memory.c:4059 [inline]
handle_pte_fault mm/memory.c:5888 [inline]
__handle_mm_fault+0x2041/0x6ef0 mm/memory.c:6031
handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6200
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fe6c7d54ebc
RSP: 002b:00007fe6c80cfb88 EFLAGS: 00010206
RAX: 0000400000000140 RBX: 0000000000000004 RCX: 8000000000000015
RDX: 0000000000000015 RSI: 00007fe6c78001bd RDI: 0000400000000140
RBP: 00007fe6c7fa7ba0 R08: 00007fe6c7c00000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fe6c7fa5fac
R13: 00007fe6c7fa5fa0 R14: fffffffffffffffe R15: 00007fe6c80cfca0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5597:
#0: ffff8880352120a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by udevd/7010:
3 locks held by kworker/1:7/8275:
#0: ffff8881446e2148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff8881446e2148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc90005317c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90005317c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffff888028c66190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#2: ffff888028c66190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5861
6 locks held by kworker/0:8/10881:
#0: ffff8881446e2148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff8881446e2148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc900044ffc60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900044ffc60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffff888144fac190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#2: ffff888144fac190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5861
#3: ffff888144faf510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3220 [inline]
#3: ffff888144faf510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5430 [inline]
#3: ffff888144faf510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
#3: ffff888144faf510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5833 [inline]
#3: ffff888144faf510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x25b9/0x5150 drivers/usb/core/hub.c:5915
#4: ffff8881437e7568 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5431 [inline]
#4: ffff8881437e7568 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
#4: ffff8881437e7568 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5833 [inline]
#4: ffff8881437e7568 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x25f7/0x5150 drivers/usb/core/hub.c:5915
#5: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
1 lock held by syz.8.1985/16685:
1 lock held by syz.2.2087/17346:
#0: ffff888148c5e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff888148c5e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:228
1 lock held by syz.0.2480/19245:
#0: ffff888148c5e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:922 [inline]
#0: ffff888148c5e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x20e/0x490 block/fops.c:839
3 locks held by kworker/u8:16/19746:
3 locks held by syz.5.2691/20275:
4 locks held by dhcpcd-run-hook/20295:
#0: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffff88807b23c018 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff88807b23c018 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: handle_pte_fault mm/memory.c:5896 [inline]
#2: ffff88807b23c018 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __handle_mm_fault+0x13ea/0x6ef0 mm/memory.c:6031
#3: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#3: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: page_ext_get+0x20/0x2a0 mm/page_ext.c:525
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller-00253-gcb82ca153949 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10881 Comm: kworker/0:8 Not tainted 6.14.0-rc6-syzkaller-00253-gcb82ca153949 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:enqueue_task_fair+0x95b/0xd40 kernel/sched/fair.c:7008
Code: fc ff df 0f 84 c3 fe ff ff e9 48 01 00 00 44 89 e1 80 e1 07 80 c1 03 38 c1 7c d9 4c 89 e7 e8 7c 5d 95 00 eb cf 83 7c 24 24 00 <48> 8b 6c 24 08 75 7f 48 8b 44 24 28 0f b6 04 10 84 c0 0f 85 f7 02
RSP: 0018:ffffc90000007ae0 EFLAGS: 00000006
RAX: 1ffff11006082b63 RBX: ffff8880b863eba0 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffff8880b863ea48 RDI: ffff8880b863ea1c
RBP: 0000000000000000 R08: ffff888030415aa7 R09: 0000000000000000
R10: ffff888030415a98 R11: ffffed1006082b55 R12: 0000000000000001
R13: ffff8880b863ea00 R14: 0000000000000000 R15: 000000000016e360
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc5871f7a8 CR3: 000000004b9ca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000004144
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
enqueue_task+0x73/0x3d0 kernel/sched/core.c:2070
activate_task kernel/sched/core.c:2117 [inline]
ttwu_do_activate+0x1d1/0x760 kernel/sched/core.c:3729
ttwu_queue kernel/sched/core.c:4002 [inline]
try_to_wake_up+0x89b/0x1470 kernel/sched/core.c:4330
hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:2037
__run_hrtimer kernel/time/hrtimer.c:1801 [inline]
__hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x700/0xa10 kernel/printk/printk.c:2431
Code: 00 e8 44 31 21 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 32 31 21 00 eb 06 e8 2b 31 21 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 a0 4f a1 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc900044ff280 EFLAGS: 00000283
RAX: ffffffff81a0aea5 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc90013bfd000 RSI: 000000000002fd6d RDI: 000000000002fd6e
RBP: ffffc900044ff390 R08: ffffffff81a0ae7e R09: 1ffffffff28a9929
R10: dffffc0000000000 R11: fffffbfff28a992a R12: dffffc0000000000
R13: 1ffff9200089fe54 R14: ffffffff81a0ace0 R15: ffffc900044ff320
dev_vprintk_emit+0x341/0x400 drivers/base/core.c:4891
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4902
_dev_err+0x122/0x170 drivers/base/core.c:4957
hub_port_init+0x1d47/0x26f0 drivers/usb/core/hub.c:5082
hub_port_connect drivers/usb/core/hub.c:5462 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
port_event drivers/usb/core/hub.c:5833 [inline]
hub_event+0x2962/0x5150 drivers/usb/core/hub.c:5915
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244