rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1):
P9414/3:b..l
rcu: (detected by 1, t=10502 jiffies, g=33113, q=164 ncpus=2)
task:syz.0.991 state:R
running task stack:25672 pid:9414 tgid:9411 ppid:5816 task_flags:0x400040 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6947
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
filemap_map_pages+0xe2b/0x1680 mm/filemap.c:3748
do_fault_around mm/memory.c:5476 [inline]
do_read_fault mm/memory.c:5509 [inline]
do_fault mm/memory.c:5652 [inline]
do_pte_missing+0xf1a/0x3fb0 mm/memory.c:4160
handle_pte_fault mm/memory.c:5997 [inline]
__handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
faultin_page mm/gup.c:1193 [inline]
__get_user_pages+0x771/0x36f0 mm/gup.c:1491
populate_vma_page_range+0x278/0x3a0 mm/gup.c:1929
__mm_populate+0x1d8/0x380 mm/gup.c:2032
mm_populate include/linux/mm.h:3487 [inline]
vm_mmap_pgoff+0x362/0x450 mm/util.c:584
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:607
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc867d8e969
RSP: 002b:00007fc868bf9038 EFLAGS: 00000246
ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fc867fb5fa0 RCX: 00007fc867d8e969
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fc867e10ab1 R08: ffffffffffffffff R09: 0000000030dd3000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fc867fb5fa0 R15: 00007fffacf6cff8
rcu: rcu_preempt kthread starved for 8766 jiffies! g33113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:27848 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2248
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
radio-si470x 5-1:0.0: non-zero urb status (-71)
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 971 Comm: kworker/0:2 Not tainted 6.15.0-rc4-syzkaller-00189-g2bfcee565c3a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:prb_read kernel/printk/printk_ringbuffer.c:1932 [inline]
RIP: 0010:_prb_read_valid+0x22d/0x890 kernel/printk/printk_ringbuffer.c:2113
Code: 85 d5 03 00 00 e8 13 78 1f 00 48 83 7c 24 08 00 0f 84 0f 05 00 00 e8 02 78 1f 00 48 8b 44 24 08 48 b9 00 00 00 00 00 fc ff df <48> c1 e8 03 80 3c 08 00 0f 85 f7 05 00 00 48 8b 44 24 08 48 8b 28
RSP: 0018:ffffc900000071f0 EFLAGS: 00000087
RAX: ffffc90000007420 RBX: ffffffff8e355c28 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: ffffffff819bbaee RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000135178 R12: 000000000000000d
R13: 00000000000058eb R14: ffffffff8e2ccae0 R15: ffffc900000072c0
FS: 0000000000000000(0000) GS:ffff8881249e1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febcd6acf98 CR3: 000000002f86f000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
prb_read_valid+0x78/0xa0 kernel/printk/printk_ringbuffer.c:2185
printk_get_next_message+0x15b/0x6d0 kernel/printk/printk.c:3005
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x6ea/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
dev_vprintk_emit drivers/base/core.c:4917 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4928
__dev_printk+0xf5/0x270 drivers/base/core.c:4940
_dev_warn+0xe4/0x120 drivers/base/core.c:4984
si470x_int_in_callback+0x15d/0xca0 drivers/media/radio/si470x/radio-si470x-usb.c:378
__usb_hcd_giveback_urb+0x38a/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x180e/0x3a20 drivers/usb/gadget/udc/dummy_hcd.c:1994
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0x2c8/0x350 kernel/locking/lockdep.c:5829
Code: 8b 05 8c 1a ed 0e 85 c0 0f 85 b6 fd ff ff b9 0a 00 00 00 ba 08 00 00 00 48 8d 74 24 08 48 89 df e8 ed cc ff ff e9 9a fd ff ff c3 c6 08 00 84 c0 0f 85 7f fd ff ff 80 3d 32 4e d5 0e 00 0f 85
RSP: 0018:ffffc90003ac7b88 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffffffff8f4bccd8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8f4bccd8
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000421 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
wg_ratelimiter_gc_entries+0xc6/0x520 drivers/net/wireguard/ratelimiter.c:63
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)
radio-si470x 5-1:0.0: non-zero urb status (-71)