rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6680/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=24341, q=386 ncpus=2)
task:syz-executor.2 state:R running task stack:20288 pid:6680 tgid:6680 ppid:6659 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1089 [inline]
free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2669
folios_put_refs+0x76e/0x860 mm/swap.c:1020
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x6de/0x1df0 mm/shmem.c:1013
shmem_truncate_range mm/shmem.c:1122 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1250
evict+0x2a8/0x630 fs/inode.c:667
__dentry_kill+0x20d/0x630 fs/dcache.c:603
dput+0x19f/0x2b0 fs/dcache.c:845
__fput+0x68c/0x8b0 fs/file_table.c:430
task_work_run+0x24f/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f746187cccb
RSP: 002b:00007fff81a32920 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f746187cccb
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 00007fff81a329cc R08: 0000000000000000 R09: 00007fff81a326c7
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000031b90 R14: 00000000000318f9 R15: 000000000000000a
rcu: rcu_preempt kthread starved for 10537 jiffies! g24341 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:24304 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_sub+0x66/0x170 kernel/sched/core.c:5693
Code: c1 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 cb 47 9e 7e f7 db 65 01 1d c2 47 9e 7e <5b> 41 5e c3 cc cc cc cc 90 e8 fc e6 48 03 85 c0 74 3a 48 c7 c0 d0
RSP: 0018:ffffc90000167b50 EFLAGS: 00000257
RAX: 0000000000000001 RBX: 00000000ffffffff RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: 0000000000000001
RBP: ffff888017698000 R08: ffffffff8fae026f R09: 1ffffffff1f5c04d
R10: dffffc0000000000 R11: fffffbfff1f5c04e R12: dffffc0000000000
R13: 1ffff9200002cf74 R14: dffffc0000000000 R15: ffff888017699278
__schedule_loop kernel/sched/core.c:6607 [inline]
schedule+0x155/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4489 Comm: kworker/u9:1 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: hci1 hci_cmd_sync_work
RIP: 0010:complete_signal+0x656/0xcf0
Code: df 80 3c 08 00 74 08 4c 89 f7 e8 25 e7 9f 00 49 8b 1e 48 89 de 48 83 e6 04 31 ff e8 e4 dc 39 00 48 83 e3 04 0f 85 03 02 00 00 <4c> 89 64 24 18 e8 f0 d7 39 00 4d 89 f5 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000007c40 EFLAGS: 00000046
RAX: 0000000080010002 RBX: 0000000000000000 RCX: ffff88802b318000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007d40 R08: ffffffff815c8afc R09: 1ffff1100486cb40
R10: dffffc0000000000 R11: ffffed100486cb41 R12: 0000000000000020
R13: 0000000000000000 R14: ffff888024365a00 R15: 0000000000000020
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef30000 CR3: 000000001d3ce000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__send_signal_locked+0xb1b/0xdc0 kernel/signal.c:1185
do_send_sig_info kernel/signal.c:1301 [inline]
group_send_sig_info+0x292/0x310 kernel/signal.c:1451
do_bpf_send_signal+0x85/0x190 kernel/trace/bpf_trace.c:838
irq_work_single+0xe2/0x240 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x18b/0x350 kernel/irq_work.c:261
__sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5066
Code: c9 50 e8 09 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 c0 14 32 0a e8 8b 2f 37 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000d55f228 EFLAGS: 00000282
RAX: f1e7e9143f154700 RBX: ffff88802b318000 RCX: ffffffff8172caea
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: ffffffff8c200e00
RBP: ffffc9000d55f270 R08: ffffffff92fc9797 R09: 1ffffffff25f92f2
R10: dffffc0000000000 R11: fffffbfff25f92f3 R12: 1ffff11017287ec7
R13: dffffc0000000000 R14: ffff8880b943e8c0 R15: ffff8880b943f638
context_switch kernel/sched/core.c:5195 [inline]
__schedule+0x17f0/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:79 [inline]
RIP: 0010:preempt_count_add+0x3d/0x190 kernel/sched/core.c:5652
Code: c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 ed 00 00 00 83 3d ac 8b 16 13 00 75 07 65 8b 05 8b 49 9e 7e <65> 01 1d 84 49 9e 7e 48 c7 c0 20 18 7c 94 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc9000d55f608 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff947c1803
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: 0000000000000001
RBP: ffff88802b318000 R08: ffffffff92fc9797 R09: 1ffffffff25f92f2
R10: dffffc0000000000 R11: fffffbfff25f92f3 R12: dffffc0000000000
R13: 1ffff92001aabecc R14: ffffffff8b971ed0 R15: dffffc0000000000
__schedule_loop kernel/sched/core.c:6605 [inline]
schedule+0x144/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
__hci_cmd_sync_sk+0x8df/0x1130 net/bluetooth/hci_sync.c:171
__hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:252 [inline]
hci_disconnect_sync+0x204/0x3d0 net/bluetooth/hci_sync.c:5282
hci_abort_conn_sync+0x147/0xde0
hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:310
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244