rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=d304/1/0x4000000000000000 softirq=50648/50648 fqs=1
rcu: 	(detected by 1, t=10503 jiffies, g=74213, q=257 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12681 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__netif_schedule+0x2d1/0x310 net/core/dev.c:3135
Code: fb 48 c7 44 24 20 0e 36 e0 45 4b c7 44 35 00 00 00 00 00 66 43 c7 44 35 09 00 00 43 c6 44 35 0b 00 65 48 8b 04 25 28 00 00 00 <48> 3b 84 24 80 00 00 00 75 2c 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007ba0 EFLAGS: 00000046
RAX: 0692c4a130902700 RBX: 0000000000000001 RCX: ffff88807b89da00
RDX: 0000000080010001 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007c80 R08: ffffffff894efdea R09: 1ffff1100aeb542b
R10: dffffc0000000000 R11: ffffed100aeb542c R12: ffff8880575aa000
R13: dffffc0000000000 R14: 1ffff92000000f78 R15: ffff8880575aa300
FS:  000055555b52a480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f622c596000 CR3: 000000005add2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 advance_sched+0xaa9/0xca0 net/sched/sch_taprio.c:986
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:ext4_group_desc_csum+0x53/0xc20 fs/ext4/super.c:3203
Code: 8b 04 25 28 00 00 00 48 89 84 24 00 01 00 00 49 be 00 00 00 00 00 fc ff df 4c 8d bc 24 e0 00 00 00 48 c7 44 24 40 b3 8a b5 41 <48> c7 44 24 48 4c 86 b8 8d 48 c7 44 24 50 b0 f5 65 82 48 8d 4c 24
RSP: 0018:ffffc90004fef8a0 EFLAGS: 00000286
RAX: 0692c4a130902700 RBX: ffff88802be8a000 RCX: ffff88807b89da00
RDX: ffff888144298000 RSI: 0000000000000000 RDI: ffff88802be8a000
RBP: ffffc90004fef9e8 R08: ffffffff82660338 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880126af3f0 R12: 0000000000000000
R13: 1ffff110057d14c7 R14: dffffc0000000000 R15: ffffc90004fef980
 ext4_group_desc_csum_set+0x19c/0x240 fs/ext4/super.c:3260
 __ext4_new_inode+0x2789/0x4390 fs/ext4/ialloc.c:1229
 ext4_symlink+0x38d/0xb50 fs/ext4/namei.c:3395
 vfs_symlink+0x137/0x2e0 fs/namei.c:4489
 do_symlinkat+0x222/0x3a0 fs/namei.c:4515
 __do_sys_symlinkat fs/namei.c:4531 [inline]
 __se_sys_symlinkat fs/namei.c:4528 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4528
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb3be27c6e7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdfd7a7ca8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb3be27c6e7
RDX: 00007fb3be2da788 RSI: 00000000ffffff9c RDI: 00007ffdfd7a7d60
RBP: 0000000000000001 R08: 0000000000000013 R09: 00007ffdfd7a79f7
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 00007ffdfd7a7d60 R15: 0000000000000001
 </TASK>
rcu: rcu_preempt kthread starved for 10501 jiffies! g74213 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:25232 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 12680 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1060
Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 ea de 55 00 e8 55 4b 5d 00 45 38 f7 75 15 66 90 e8 59 de 55 00 0f 00 2d 82 d8 87 0a fb f4 <e9> 50 fe ff ff e8 46 de 55 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38
RSP: 0018:ffffc90004fa7760 EFLAGS: 00000246
RAX: ffffffff81404737 RBX: ffff88802e025000 RCX: 0000000000040000
RDX: ffffc90010dc3000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90004fa7830 R08: ffffffff92f7261f R09: 1ffffffff25ee4c3
R10: dffffc0000000000 R11: fffffbfff25ee4c4 R12: 1ffff920009f4ef0
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003
FS:  00007fe98f3186c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32621000 CR3: 0000000068222000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:596 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x8d0/0xdc0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 ext4_lock_group fs/ext4/ext4.h:3497 [inline]
 __ext4_new_inode+0x14e0/0x4390 fs/ext4/ialloc.c:1094
 ext4_mkdir+0x425/0xcf0 fs/ext4/namei.c:3013
 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4131
 do_mkdirat+0x264/0x3a0 fs/namei.c:4154
 __do_sys_mkdirat fs/namei.c:4169 [inline]
 __se_sys_mkdirat fs/namei.c:4167 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4167
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe98e67ba67
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe98f317ef8 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fe98f317f80 RCX: 00007fe98e67ba67
RDX: 00000000000001ff RSI: 0000000020009ec0 RDI: 00000000ffffff9c
RBP: 0000000020009e00 R08: 0000000000000000 R09: 0000000000009dea
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020009ec0
R13: 00007fe98f317f40 R14: 0000000000009dee R15: 0000000020009f40
 </TASK>