rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=7b24/1/0x4000000000000000 softirq=80174/80185 fqs=13
rcu: hardirqs softirqs csw/system
rcu: number: 2 0 0
rcu: cputime: 45042 5500 1095 ==> 50840(ms)
rcu: (t=10548 jiffies g=117333 q=877 ncpus=2)
rcu: rcu_preempt kthread starved for 2638 jiffies! g117333 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:28240 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xa50 kernel/rcu/tree.c:1609
rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1808
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</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: 26 Comm: kworker/1:1 Not tainted 6.5.0-rc2-syzkaller-00052-gbfa3037d8280 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: events switchdev_deferred_process_work
RIP: 0010:__lock_acquire+0xe88/0x5de0 kernel/locking/lockdep.c:5016
Code: 0f 87 dd 17 00 00 39 05 96 07 8a 0f 0f 82 fb 07 00 00 b9 01 00 00 00 e9 01 02 00 00 44 89 eb 0f 87 8f 33 00 00 49 8d 7c da 08 <48> ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 0f
RSP: 0018:ffffc900001e0bd0 EFLAGS: 00000097
RAX: ffff888018659dc0 RBX: 0000000000000000 RCX: 1ffff11017325713
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880b992b8a0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880b992b898 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000a1c9c0 CR3: 000000002366b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
lock_acquire kernel/locking/lockdep.c:5761 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x2bd/0xc10 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
__sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1109
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:19 [inline]
RIP: 0010:mutex_spin_on_owner+0x1e3/0x2e0 kernel/locking/mutex.c:383
Code: 24 00 74 53 48 8d 7b 50 48 89 f8 48 c1 e8 03 42 80 3c 38 00 0f 85 e9 00 00 00 48 8b 04 24 48 3b 43 50 0f 85 f9 fe ff ff f3 90 <e9> 97 fe ff ff 65 8b 05 c9 ed 9d 7e a9 ff ff ff 7f 0f 85 68 fe ff
RSP: 0018:ffffc90000a1fb38 EFLAGS: 00000246
RAX: 0000000000004000 RBX: ffffffff8e3df7c0 RCX: 1ffffffff19020dc
RDX: fffffbfff1c7bef9 RSI: 0000000000000008 RDI: 0000000000000000
RBP: ffff888027d59dc0 R08: 0000000000000000 R09: fffffbfff1c7bef8
R10: ffffffff8e3df7c7 R11: 0000000000000000 R12: 0000000000000000
R13: ffffed10030cb3b8 R14: ffff888018659dc0 R15: dffffc0000000000
mutex_optimistic_spin kernel/locking/mutex.c:476 [inline]
__mutex_lock_common kernel/locking/mutex.c:607 [inline]
__mutex_lock+0x3d8/0x1340 kernel/locking/mutex.c:747
switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
worker_thread+0x687/0x1110 kernel/workqueue.c:2748
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
CPU: 0 PID: 26044 Comm: syz-executor.5 Not tainted 6.5.0-rc2-syzkaller-00052-gbfa3037d8280 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 kernel/kcov.c:207
Code: 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 cd 48 7d 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 a9
RSP: 0018:ffffc90000007d08 EFLAGS: 00000246
RAX: 0000000000000102 RBX: ffff88807d797000 RCX: 0000000000000100
RDX: 1ffff110082c0e1b RSI: ffffffff884d341d RDI: ffff8880416070d8
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffffc90000007ff8 R12: ffff888041607000
R13: 0000000000000000 R14: ffff88804828a000 R15: ffff888041607018
FS: 0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f12b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000007f1b2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
taprio_dequeue_from_txq+0x3c0/0x8d0 net/sched/sch_taprio.c:726
taprio_dequeue_tc_priority+0x289/0x4b0 net/sched/sch_taprio.c:798
taprio_dequeue+0x12e/0x5f0 net/sched/sch_taprio.c:868
dequeue_skb net/sched/sch_generic.c:292 [inline]
qdisc_restart net/sched/sch_generic.c:397 [inline]
__qdisc_run+0x1c4/0x19d0 net/sched/sch_generic.c:415
qdisc_run include/net/pkt_sched.h:125 [inline]
qdisc_run include/net/pkt_sched.h:122 [inline]
net_tx_action+0x71e/0xc80 net/core/dev.c:5049
__do_softirq+0x218/0x965 kernel/softirq.c:553
do_softirq kernel/softirq.c:454 [inline]
do_softirq+0xaa/0xe0 kernel/softirq.c:441
</IRQ>
<TASK>
__local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381
spin_unlock_bh include/linux/spinlock.h:396 [inline]
taprio_change+0x2be4/0x3890 net/sched/sch_taprio.c:1996
taprio_init+0x6c4/0x950 net/sched/sch_taprio.c:2126
qdisc_create+0x4f7/0x10a0 net/sched/sch_api.c:1326
tc_modify_qdisc+0x4a4/0x1bf0 net/sched/sch_api.c:1720
rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6424
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2549
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1914
sock_sendmsg_nosec net/socket.c:725 [inline]
sock_sendmsg+0xd9/0x180 net/socket.c:748
____sys_sendmsg+0x6ac/0x940 net/socket.c:2494
___sys_sendmsg+0x135/0x1d0 net/socket.c:2548
__sys_sendmsg+0x117/0x1e0 net/socket.c:2577
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f17579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f125ac EFLAGS: 00000292 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200007c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>