rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=6d54/1/0x4000000000000000 softirq=171864/171866 fqs=119
rcu: (detected by 0, t=10502 jiffies, g=316821, q=83 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23273 Comm: syz-executor.3 Not tainted 6.7.0-rc2-syzkaller-00029-g9b6de136b5f0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:hash_64_generic include/linux/hash.h:78 [inline]
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3758 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3781 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3836 [inline]
RIP: 0010:__lock_acquire+0x14f3/0x3b10 kernel/locking/lockdep.c:5136
Code: ff ff c7 44 24 78 01 00 00 00 e9 1c f6 ff ff 4c 89 f7 e8 70 4a ff ff 48 8b 5c 24 08 48 b8 eb 83 b5 80 46 86 c8 61 48 0f af c3 <48> c1 e8 2f 49 89 c4 48 8d 04 c5 e0 5d df 91 48 89 c2 48 89 44 24
RSP: 0018:ffffc900003f8ae8 EFLAGS: 00000883
RAX: dd63cd743f9b55a7 RBX: e9c29562daa19235 RCX: ffffffff8166216e
RDX: fffffbfff23e1bd1 RSI: 0000000000000008 RDI: ffffffff91f0de80
RBP: ffffffff91f13580 R08: 0000000000000000 R09: fffffbfff23e1bd0
R10: ffffffff91f0de87 R11: 0000000000000002 R12: ffffed100f53798f
R13: 0000000000000001 R14: ffff88807a9bccd0 R15: 0000000000000002
FS: 00005555569c1480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11c9998000 CR3: 000000001c835000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5753 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5718
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
debug_object_deactivate lib/debugobjects.c:783 [inline]
debug_object_deactivate+0x113/0x320 lib/debugobjects.c:771
debug_hrtimer_deactivate kernel/time/hrtimer.c:427 [inline]
debug_deactivate kernel/time/hrtimer.c:483 [inline]
__run_hrtimer kernel/time/hrtimer.c:1656 [inline]
__hrtimer_run_queues+0x470/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5721
Code: c1 05 6d 77 9b 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003eafe08 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920007d5fc3 RCX: ffffffff8166216e
RDX: 0000000000000001 RSI: ffffffff8accace0 RDI: ffffffff8b2ee580
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e1bd3
R10: ffffffff91f0de9f R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88801fc85898 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]
close_fd_get_file+0x4d/0x80 fs/file.c:816
__do_sys_close fs/open.c:1580 [inline]
__se_sys_close fs/open.c:1575 [inline]
__x64_sys_close+0x35/0xf0 fs/open.c:1575
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f11c987b9da
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffce22f7390 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f11c987b9da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001d
RBP: 0000000000000032 R08: 0000001b31d20000 R09: 00000000000001b0
R10: 000000008171f338 R11: 0000000000000293 R12: 00007f11c9400458
R13: ffffffffffffffff R14: 00007f11c9400000 R15: 00000000002e2000
rcu: rcu_preempt kthread starved for 10263 jiffies! g316821 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:28336 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 5174 Comm: kworker/0:9 Not tainted 6.7.0-rc2-syzkaller-00029-g9b6de136b5f0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events fqdir_free_fn
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_single+0x1f0/0x650 kernel/smp.c:650
Code: de 89 fa c1 e2 10 09 d0 89 84 24 8c 00 00 00 e8 a6 fa ff ff 41 89 c5 0f 1f 44 00 00 e8 59 9b 0b 00 eb 07 e8 52 9b 0b 00 f3 90 <8b> 9c 24 88 00 00 00 31 ff 83 e3 01 89 de e8 ad 96 0b 00 85 db 75
RSP: 0018:ffffc900040dfb20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff817ae513
RDX: ffff888037dd0080 RSI: ffffffff817ae4fe RDI: 0000000000000005
RBP: ffffc900040dfc30 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 1ffff9200081bf68
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880b993d640
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561b0ed39dd8 CR3: 00000000314d1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x284/0x6c0 kernel/rcu/tree.c:4082
fqdir_free_fn+0x32/0x160 net/ipv4/inet_fragment.c:164
process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242