rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=496/1/0x4000000000000000 softirq=67737/67737 fqs=1
(detected by 0, t=10502 jiffies, g=105181, q=30)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3536 Comm: syz-executor.3 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:354 [inline]
RIP: 0010:__rcu_read_lock+0x25/0x60 kernel/rcu/tree_plugin.h:374
Code: 0f 1f 44 00 00 53 65 48 8b 1c 25 00 fe 01 00 48 81 c3 78 03 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 8a 04 08 <84> c0 75 13 8b 03 ff c0 89 03 3d 00 00 00 40 7d 02 5b c3 0f 0b eb
RSP: 0018:ffffc90000da8d10 EFLAGS: 00000806
RAX: 1ffff1100b391c00 RBX: ffff888059c8e7f8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88809183eb58
RBP: ffff8880a74eb900 R08: dffffc0000000000 R09: ffffed1012307d5e
R10: ffffed1012307d5e R11: 0000000000000000 R12: 17f773d400000000
R13: dffffc0000000000 R14: ffff88809183e800 R15: ffff88809183eb60
FS: 00007fbe85fe8700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ed1b0 CR3: 00000000a7cfb000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
rcu_read_lock include/linux/rcupdate.h:632 [inline]
advance_sched+0x70b/0x8c0 net/sched/sch_taprio.c:752
__run_hrtimer kernel/time/hrtimer.c:1524 [inline]
__hrtimer_run_queues+0x47f/0x930 kernel/time/hrtimer.c:1588
hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
</IRQ>
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
sysvec_apic_timer_interrupt+0x94/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:lock_release+0x3c4/0x750 kernel/locking/lockdep.c:5026
Code: 48 c1 e8 03 42 80 3c 28 00 74 0c 48 c7 c7 f8 14 4d 89 e8 ef b3 5a 00 48 83 3d 8f f7 f2 07 00 0f 84 5c 03 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 50 0f 85 40
RSP: 0018:ffffc900166a7d30 EFLAGS: 00000286
RAX: 1ffffffff129a29f RBX: 1ffff1100b391dac RCX: ffff888059c8e480
RDX: ffff888059c8ed60 RSI: ffff8880598271e8 RDI: 0000000000000286
RBP: 0de114c57b567705 R08: dffffc0000000000 R09: fffffbfff131e0f6
R10: fffffbfff131e0f6 R11: 0000000000000000 R12: 0000000000000286
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888059c8ed64
_copy_from_user+0x28/0x170 lib/usercopy.c:12
copy_from_user include/linux/uaccess.h:160 [inline]
copy_from_sockptr_offset include/linux/sockptr.h:48 [inline]
tcp_repair_options_est net/ipv4/tcp.c:2807 [inline]
do_tcp_setsockopt+0x12f7/0x30d0 net/ipv4/tcp.c:3178
__sys_setsockopt+0x4a9/0x870 net/socket.c:2132
__do_sys_setsockopt net/socket.c:2143 [inline]
__se_sys_setsockopt net/socket.c:2140 [inline]
__x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2140
do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d4d9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbe85fe7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000002f680 RCX: 000000000045d4d9
RDX: 0000000000000016 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 000000000118cf90 R08: 000000000012f7e5 R09: 0000000000000000
R10: 0000000020000440 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc5af74f5f R14: 00007fbe85fe89c0 R15: 000000000118cf4c
rcu: rcu_preempt kthread starved for 10500 jiffies! g105181 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:28896 pid: 10 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0x979/0xce0 kernel/sched/core.c:4527