rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P17477/1:b..l
	(detected by 0, t=10502 jiffies, g=111913, q=59 ncpus=2)
task:syz.9.2817      state:R  running task     stack:26288 pid:17477 ppid:13873  flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6732
 preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6756
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 filemap_map_pages+0xf0f/0x11e0 mm/filemap.c:3531
 do_fault_around mm/memory.c:4598 [inline]
 do_read_fault mm/memory.c:4624 [inline]
 do_fault mm/memory.c:4758 [inline]
 handle_pte_fault mm/memory.c:5029 [inline]
 __handle_mm_fault mm/memory.c:5171 [inline]
 handle_mm_fault+0x25e5/0x3d40 mm/memory.c:5292
 do_user_addr_fault+0x58e/0xb20 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fbb81c72980
RSP: 002b:00007ffd5b1c9920 EFLAGS: 00010202
RAX: 000000110c270000 RBX: ffffffff818eee36 RCX: 0000000000000006
RDX: 0000000000000e36 RSI: 0000000000003bb8 RDI: 0000000000000040
RBP: 0000000000000000 R08: 00007fbb82010000 R09: 00007fbb82012000
R10: 00000000818eee3a R11: 0000000000000002 R12: 00007fbb82026038
R13: 0000000000000040 R14: ffffffff818ee0a6 R15: 00007fbb82b55720
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g111913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=71691
rcu: rcu_preempt kthread starved for 10502 jiffies! g111913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27632 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 schedule+0xb9/0x180 kernel/sched/core.c:6639
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7764 Comm: kworker/1:14 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events azx_probe_work
RIP: 0010:__lock_acquire+0xe2/0x7c40 kernel/locking/lockdep.c:4930
Code: 8b 05 82 5f 9e 7e 48 89 44 24 20 48 c7 c0 64 4b 21 8e 48 c1 e8 03 42 0f b6 04 00 84 c0 0f 85 e9 64 00 00 83 3d 82 3b bd 0c 00 <0f> 84 80 27 00 00 83 3d 71 a9 3b 0b 00 74 2a 4c 89 e8 48 c1 e8 03
RSP: 0018:ffffc90003b37340 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffff92000766e88
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff8dd3c6b8
RBP: ffffc90003b37570 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1c422d6 R12: 0000000000000001
R13: ffffffff8dd3c6b8 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb82d39ff8 CR3: 000000006360f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000006800 DR2: 0000000000009951
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 __raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline]
 _raw_spin_trylock+0x43/0x70 kernel/locking/spinlock.c:138
 ___ratelimit+0x11a/0x610 lib/ratelimit.c:47
 snd_hdac_bus_update_rirb+0x2e5/0x5a0 sound/hda/hdac_controller.c:225
 snd_hdac_bus_get_response+0x234/0x6a0 sound/hda/hdac_controller.c:258
 azx_rirb_get_response sound/pci/hda/hda_controller.c:772 [inline]
 azx_get_response+0x39b/0x840 sound/pci/hda/hda_controller.c:928
 probe_codec sound/pci/hda/hda_controller.c:1138 [inline]
 azx_probe_codecs+0x205/0x8d0 sound/pci/hda/hda_controller.c:1205
 azx_probe_continue+0x179c/0x26a0 sound/pci/hda/hda_intel.c:2354
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>