rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=37cc/1/0x4000000000000000 softirq=65673/65674 fqs=0
rcu: (detected by 1, t=10502 jiffies, g=100813, q=74 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5079 Comm: syz-executor.4 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:__lock_acquire+0xdd1/0x7f70 kernel/locking/lockdep.c:5106
Code: 89 d8 48 c1 e8 06 48 8d 3c c5 80 93 6f 90 be 08 00 00 00 e8 11 71 7b 00 49 b8 00 00 00 00 00 fc ff df 48 0f a3 1d 7f 8f 02 0f <0f> 83 ce 0a 00 00 49 8d 9d b8 0a 00 00 48 89 d8 48 c1 e8 03 48 89
RSP: 0018:ffffc90000007820 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000020 RCX: ffffffff816d03ef
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff906f9380
RBP: ffffc90000007ae8 R08: dffffc0000000000 R09: 1ffffffff20df270
R10: dffffc0000000000 R11: fffffbfff20df271 R12: ffff88802512c640
R13: ffff88802512bb80 R14: ffff88802512c670 R15: ffff88802512c690
FS: 00005555567d3480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a23b98000 CR3: 000000003836d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753
rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
rcu_read_lock include/linux/rcupdate.h:749 [inline]
advance_sched+0xa27/0xcb0 net/sched/sch_taprio.c:996
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x59f/0xd10 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
__sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1080
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:inet6_sk include/linux/ipv6.h:331 [inline]
RIP: 0010:inet6_cleanup_sock+0x89/0x210 net/ipv6/af_inet6.c:490
Code: ef ff ff 31 ff e8 e7 5f 12 f8 81 e5 bf ef ff ff 74 27 e8 2a 5c 12 f8 49 8d 9e 10 05 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 4d c4 6c f8 48 8b 2b eb 07 e8 03 5c 12 f8 31 ed
RSP: 0018:ffffc9000424fd70 EFLAGS: 00000246
RAX: 1ffff1100f911d62 RBX: ffff88807c88eb10 RCX: ffff88802512bb80
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000
RBP: 0000000000000080 R08: ffffffff897baec9 R09: 1ffff1100f911ccc
R10: dffffc0000000000 R11: ffffed100f911ccd R12: ffff88803f8daa18
R13: ffff88807c88eae8 R14: ffff88807c88e600 R15: dffffc0000000000
inet6_sock_destruct+0x15/0x20 net/ipv6/af_inet6.c:114
__sk_destruct+0x54/0x610 net/core/sock.c:2185
inet_release+0x178/0x1f0 net/ipv4/af_inet.c:433
__sock_release net/socket.c:659 [inline]
sock_close+0xb8/0x230 net/socket.c:1402
__fput+0x3f8/0x910 fs/file_table.c:384
__do_sys_close fs/open.c:1572 [inline]
__se_sys_close+0x15f/0x220 fs/open.c:1557
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9596e7b9da
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:00007fff78d0f2d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9596e7b9da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fff78d0f34c R08: 00000000000003b8 R09: 0079746972756365
R10: 00007f9596f786a0 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000164edc R14: 0000000000164b47 R15: 000000000000001c
rcu: rcu_preempt kthread starved for 10502 jiffies! g100813 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:26504 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x196c/0x4af0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1613
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1812
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 7330 Comm: kworker/u4:0 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:300 [inline]
RIP: 0010:smp_call_function_many_cond+0x1805/0x2890 kernel/smp.c:844
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 34 59 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 6f 55 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 53 55
RSP: 0018:ffffc90004c9f720 EFLAGS: 00000293
RAX: ffffffff8182b5ad RBX: 1ffff110173087b9 RCX: ffff88807ac1d940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004c9f920 R08: ffffffff8182b57c R09: 1ffffffff20df270
R10: dffffc0000000000 R11: fffffbfff20df271 R12: dffffc0000000000
R13: ffff8880b9843dc8 R14: ffff8880b993d440 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7cdc9d98 CR3: 000000000d130000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1998 [inline]
text_poke_bp_batch+0x350/0xb20 arch/x86/kernel/alternative.c:2208
text_poke_flush arch/x86/kernel/alternative.c:2399 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2406
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x132/0x250 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:830
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703
worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304