INFO: task syz.2.2273:13170 blocked for more than 143 seconds.
Not tainted 6.14.0-syzkaller-11125-g609706855d90 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2273 state:D stack:24616 pid:13170 tgid:13170 ppid:5860 task_flags:0x440040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
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+0x6ff/0xa50 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
do_sync_mmap_readahead+0x4a1/0x980 mm/filemap.c:-1
filemap_fault+0x8b3/0x14a0 mm/filemap.c:3414
__do_fault+0x135/0x390 mm/memory.c:4991
do_cow_fault mm/memory.c:5441 [inline]
do_fault mm/memory.c:5547 [inline]
do_pte_missing mm/memory.c:4056 [inline]
handle_pte_fault mm/memory.c:5890 [inline]
__handle_mm_fault+0x1f35/0x6ef0 mm/memory.c:6033
handle_mm_fault+0x3fa/0x900 mm/memory.c:6202
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fdb31554ebc
RSP: 002b:00007fdb318cfb88 EFLAGS: 00010246
RAX: 0000200000000000 RBX: 0000000000000004 RCX: 8000000000000010
RDX: 0000000000000010 RSI: 00007fdb310000c7 RDI: 0000200000000000
RBP: 00007fdb317a7ba0 R08: 00007fdb31400000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007fdb317a608c
R13: 00007fdb317a6080 R14: fffffffffffffffe R15: 00007fdb318cfca0
INFO: task syz.2.2273:13171 blocked for more than 144 seconds.
Not tainted 6.14.0-syzkaller-11125-g609706855d90 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2273 state:D stack:25672 pid:13171 tgid:13170 ppid:5860 task_flags:0x440040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
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+0x6ff/0xa50 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
do_sync_mmap_readahead+0x4a1/0x980 mm/filemap.c:-1
filemap_fault+0x8b3/0x14a0 mm/filemap.c:3414
__do_fault+0x135/0x390 mm/memory.c:4991
do_cow_fault mm/memory.c:5441 [inline]
do_fault mm/memory.c:5547 [inline]
do_pte_missing mm/memory.c:4056 [inline]
handle_pte_fault mm/memory.c:5890 [inline]
__handle_mm_fault+0x1f35/0x6ef0 mm/memory.c:6033
handle_mm_fault+0x3fa/0x900 mm/memory.c:6202
do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x2bb/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_8+0xd/0x20 arch/x86/lib/putuser.S:115
Code: 89 01 31 c9 0f 01 ca c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 cc cc cc cc 66 0f 1f 44 00 00 90 90 90
RSP: 0018:ffffc90003d8fbb8 EFLAGS: 00050202
RAX: 0000000000000042 RBX: 0000000000000000 RCX: 0000200000000180
RDX: 0000000000000001 RSI: ffffffff8e4f31fc RDI: ffffffff8ca180c0
RBP: ffffc90003d8fe10 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888148f1c510 R14: ffffffff9366f020 R15: 1ffff920007b1f80
put_u64 block/ioctl.c:279 [inline]
blkdev_common_ioctl+0xd41/0x25a0 block/ioctl.c:575
blkdev_ioctl+0x52c/0x710 block/ioctl.c:692
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb3158d169
RSP: 002b:00007fdb324ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fdb317a5fa0 RCX: 00007fdb3158d169
RDX: 0000200000000180 RSI: 0000000080081280 RDI: 0000000000000004
RBP: 00007fdb3160e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdb317a5fa0 R15: 00007fdb318cfa28
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:4/60:
2 locks held by getty/5601:
#0: ffff88814d9760a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000334b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x53d/0x16b0 drivers/tty/n_tty.c:2211
8 locks held by kworker/1:14/9884:
#0: ffff88814529f148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814529f148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000ba17c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000ba17c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff888028760190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#2: ffff888028760190 (&dev->mutex){....}-{4:4}, at: hub_event+0x200/0x50f0 drivers/usb/core/hub.c:5861
#3: ffff88805c803190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff88805c803190 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x103/0x960 drivers/usb/core/hub.c:2307
#4: ffff8880469e8160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff8880469e8160 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff8880469e8160 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffffffff900f5648 (rtnl_mutex){+.+.}-{4:4}, at: ieee802154_unregister_hw+0x5a/0xe0 net/mac802154/main.c:280
#6: ffff8880281a6788 (&local->iflist_mtx#2){+.+.}-{4:4}, at: ieee802154_remove_interfaces+0x33/0x1d0 net/mac802154/iface.c:702
#7: ffffffff8ed40a78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#7: ffffffff8ed40a78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x384/0x830 kernel/rcu/tree_exp.h:998
1 lock held by syz.1.2244/13099:
1 lock held by syz.2.2273/13170:
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.2.2273/13171:
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.4.2390/13530:
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.4.2390/13531:
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.7.2529/14031:
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148f1ce40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.8.2724/14695:
#0: ffffffff900f5648 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:633 [inline]
#0: ffffffff900f5648 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3390
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-11125-g609706855d90 #0 PREEMPT(full)
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+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.14.0-syzkaller-11125-g609706855d90 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__rcu_read_lock+0x9/0xb0 kernel/rcu/tree_plugin.h:413
Code: ff ff e9 b8 fc ff ff e8 75 15 84 0a 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <53> 49 be 00 00 00 00 00 fc ff df 65 4c 8b 3c 25 08 f0 66 93 49 81
RSP: 0018:ffffc900000075e8 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 1ffff92000000ee8 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8e4f31fc RDI: ffffc90000007740
RBP: ffffc90000007778 R08: ffffc90000007730 R09: 0000000000000000
R10: ffffc90000007790 R11: fffff52000000ef4 R12: ffffc90000007740
R13: dffffc0000000000 R14: ffffffff816442e7 R15: ffffc90000007740
FS: 0000000000000000(0000) GS:ffff888124fb1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4e1ececcc CR3: 000000003c9e8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock include/linux/rcupdate.h:839 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xb1/0x23b0 arch/x86/kernel/unwind_orc.c:479
__unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe7/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2376 [inline]
slab_free mm/slub.c:4633 [inline]
kfree+0x198/0x430 mm/slub.c:4832
slab_free_after_rcu_debug+0x62/0x280 mm/slub.c:4670
rcu_do_batch kernel/rcu/tree.c:2568 [inline]
rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2824
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 08 f0 66 93 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 55 48 7d 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8ea07ca8 EFLAGS: 00000246
RAX: ffffffff8ea96580 RBX: ffff8881452f0064 RCX: ffffffff8c2db6cc
RDX: 0000000000000001 RSI: ffff8881452f0000 RDI: ffff8881452f0064
RBP: ffffffff93684c78 R08: ffff8880b8632b5b R09: 1ffff110170c656b
R10: dffffc0000000000 R11: ffffffff8c2dd1a0 R12: ffff888141fd0800
R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f545ac0
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:701
cpuidle_enter_state+0x111/0x480 drivers/cpuidle/cpuidle.c:268
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:389
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x374/0x5d0 kernel/sched/idle.c:325
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:423
rest_init+0x2dc/0x300 init/main.c:743
start_kernel+0x484/0x510 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0x66/0x70 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x147
IPVS: rr: UDP 224.0.0.2:0 - no destination available