rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=1274/1/0x4000000000000000 softirq=60190/60190 fqs=0
rcu: (detected by 1, t=10506 jiffies, g=65493, q=136 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:advance_sched+0x6e6/0xc60 net/sched/sch_taprio.c:990
Code: 01 00 00 e8 dc 1d 5b f8 48 c7 c7 40 83 1b 8e 48 8d 35 00 00 00 00 e8 c9 3e 38 f8 e8 e4 fa 41 f8 b8 01 00 00 00 48 83 c4 78 5b <5d> 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 a7 1d 5b f8 49 8d 7e
RSP: 0018:ffffc90000007e00 EFLAGS: 00000082
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffc90000007d08
RDX: 0000000000000000 RSI: ffffffff8b6cd340 RDI: ffff88801c694cc4
RBP: ffff888033169400 R08: 0000000000000000 R09: fffffbfff20beb21
R10: ffffffff905f590f R11: 0000000000000000 R12: 0000000000000000
R13: ffff888033169400 R14: ffff888027ac1340 R15: ffff888031d9d800
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcd87f5f98 CR3: 000000005e216000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/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_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3181
Code: 00 e8 f0 98 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 7e ee 1f 00 48 85 db 0f 85 55 01 00 00 e8 00 ec 1f 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 f5 75 81
RSP: 0018:ffffc900000e7488 EFLAGS: 00000287
RAX: ffffffff8ee8ea78 RBX: 0000000000000000 RCX: ffffc90017a82000
RDX: 0000000000100000 RSI: ffffffff816d8f50 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8ee8ea78
R13: ffffffff8ee8ea20 R14: ffffc900000e7518 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3279
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407
dev_vprintk_emit drivers/base/core.c:4942 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4953
__dev_printk+0xf5/0x270 drivers/base/core.c:4965
_dev_info+0xe5/0x120 drivers/base/core.c:5011
show_string drivers/usb/core/hub.c:2357 [inline]
show_string drivers/usb/core/hub.c:2353 [inline]
announce_device drivers/usb/core/hub.c:2374 [inline]
usb_new_device+0x939/0x1a10 drivers/usb/core/hub.c:2632
hub_port_connect drivers/usb/core/hub.c:5521 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x2d9a/0x4e10 drivers/usb/core/hub.c:5903
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10506 jiffies! g65493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27504 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 14990 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x1cb/0x580 kernel/smp.c:679
Code: 89 fa c1 e2 10 09 d0 89 44 24 4c e8 af fa ff ff 41 89 c5 0f 1f 44 00 00 e8 22 f7 0b 00 eb 07 e8 1b f7 0b 00 f3 90 8b 5c 24 48 <31> ff 83 e3 01 89 de e8 49 f9 0b 00 85 db 75 e5 e8 00 f7 0b 00 e8
RSP: 0018:ffffc900053e7a20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000011 RCX: ffffffff81818447
RDX: ffff888032880000 RSI: ffffffff81818435 RDI: 0000000000000005
RBP: ffffc900053e7b00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff92000a7cf48
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880b863fe40
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcd87f6d58 CR3: 0000000071fca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x28d/0x700 kernel/rcu/tree.c:4614
netdev_wait_allrefs_any net/core/dev.c:10710 [inline]
netdev_run_todo+0x8e1/0x12d0 net/core/dev.c:10801
tun_detach drivers/net/tun.c:704 [inline]
tun_chr_close+0xea/0x230 drivers/net/tun.c:3517
__fput+0x3f6/0xb60 fs/file_table.c:431
task_work_run+0x14e/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xadd/0x2d70 kernel/exit.c:939
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f432497e719
Code: Unable to access opcode bytes at 0x7f432497e6ef.
RSP: 002b:00007ffd811f1d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f43249f12ae RCX: 00007f432497e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffd811efab6 R09: 00007ffd811f2fd0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd811f2fd0
R13: 00007f43249f123c R14: 000055556f33c4a8 R15: 00007ffd811f5180
watchdog: BUG: soft lockup - CPU#1 stuck for 244s! [syz-executor:14990]
Modules linked in:
irq event stamp: 1697214
hardirqs last enabled at (1697213): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357
hardirqs last disabled at (1697214): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049
softirqs last enabled at (1697202): [] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last enabled at (1697202): [] handle_softirqs+0x5bb/0x8f0 kernel/softirq.c:582
softirqs last disabled at (1697059): [] __do_softirq kernel/softirq.c:588 [inline]
softirqs last disabled at (1697059): [] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (1697059): [] __irq_exit_rcu kernel/softirq.c:637 [inline]
softirqs last disabled at (1697059): [] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
CPU: 1 UID: 0 PID: 14990 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x1c7/0x580 kernel/smp.c:679
Code: c0 48 89 de 89 fa c1 e2 10 09 d0 89 44 24 4c e8 af fa ff ff 41 89 c5 0f 1f 44 00 00 e8 22 f7 0b 00 eb 07 e8 1b f7 0b 00 f3 90 <8b> 5c 24 48 31 ff 83 e3 01 89 de e8 49 f9 0b 00 85 db 75 e5 e8 00
RSP: 0018:ffffc900053e7a20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81818447
RDX: ffff888032880000 RSI: ffffffff81818435 RDI: 0000000000000005
RBP: ffffc900053e7b00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff92000a7cf48
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880b863fe40
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcd87f6d58 CR3: 0000000071fca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x28d/0x700 kernel/rcu/tree.c:4614
netdev_wait_allrefs_any net/core/dev.c:10710 [inline]
netdev_run_todo+0x8e1/0x12d0 net/core/dev.c:10801
tun_detach drivers/net/tun.c:704 [inline]
tun_chr_close+0xea/0x230 drivers/net/tun.c:3517
__fput+0x3f6/0xb60 fs/file_table.c:431
task_work_run+0x14e/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xadd/0x2d70 kernel/exit.c:939
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f432497e719
Code: Unable to access opcode bytes at 0x7f432497e6ef.
RSP: 002b:00007ffd811f1d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f43249f12ae RCX: 00007f432497e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffd811efab6 R09: 00007ffd811f2fd0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd811f2fd0
R13: 00007f43249f123c R14: 000055556f33c4a8 R15: 00007ffd811f5180
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_lockdep_rcu_enabled+0xa/0x40 kernel/rcu/update.c:320
Code: eb b6 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 8b 05 0a 03 3c 05 <85> c0 74 20 8b 05 34 35 3c 05 85 c0 74 16 65 48 8b 05 d0 84 e0 74
RSP: 0018:ffffc90000007d78 EFLAGS: 00000096
RAX: 0000000000000002 RBX: ffff88807b7f0000 RCX: ffffffff816b163d
RDX: 1ffff11004f5825f RSI: 0000000000000004 RDI: ffffc90000007d10
RBP: 000000000003dbcc R08: 0000000000000001 R09: fffff52000000fa2
R10: 0000000000000003 R11: 0000000000000000 R12: ffff888027ac1340
R13: ffff8880b862cac0 R14: ffff888027ac1340 R15: ffffffff893256b0
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcd87f5f98 CR3: 000000005e216000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
advance_sched+0xdd/0xc60 net/sched/sch_taprio.c:925
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/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_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3181
Code: 00 e8 f0 98 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 7e ee 1f 00 48 85 db 0f 85 55 01 00 00 e8 00 ec 1f 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 f5 75 81
RSP: 0018:ffffc900000e7488 EFLAGS: 00000287
RAX: ffffffff8ee8ea78 RBX: 0000000000000000 RCX: ffffc90017a82000
RDX: 0000000000100000 RSI: ffffffff816d8f50 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8ee8ea78
R13: ffffffff8ee8ea20 R14: ffffc900000e7518 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3279
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407
dev_vprintk_emit drivers/base/core.c:4942 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4953
__dev_printk+0xf5/0x270 drivers/base/core.c:4965
_dev_info+0xe5/0x120 drivers/base/core.c:5011
show_string drivers/usb/core/hub.c:2357 [inline]
show_string drivers/usb/core/hub.c:2353 [inline]
announce_device drivers/usb/core/hub.c:2374 [inline]
usb_new_device+0x939/0x1a10 drivers/usb/core/hub.c:2632
hub_port_connect drivers/usb/core/hub.c:5521 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x2d9a/0x4e10 drivers/usb/core/hub.c:5903
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244