GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=24505, q=1282 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294963073-4294952571), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g24505 f0x2 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:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </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 UID: 0 PID: 9047 Comm: syz-executor Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:check_preemption_disabled+0x1/0x120
Code: a0 8b e2 8b 48 c7 c6 e0 8b e2 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 53 48 83 ec 10 65 48 8b 05 ee 2d 32 07 48 89 44 24 08
RSP: 0018:ffffc900001e0c28 EFLAGS: 00000046
RAX: 510175c0ba613375 RBX: 0000000000000087 RCX: 1c7255831191d500
RDX: 0000000000000001 RSI: ffffffff8db83abb RDI: ffffffff8be28c00
RBP: ffff888109430b18 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade
R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 0000000000000001
R13: 0000000000000001 R14: ffff888136627ad8 R15: ffff888109430000
FS:  0000000000000000(0000) GS:ffff8881a3c23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556776eca4e8 CR3: 000000000df38000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_release+0x27a/0x3e0
 _raw_spin_unlock_irqrestore+0x70/0x110
 __hrtimer_run_queues+0x408/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vm_area_free+0xa1/0x210
Code: 00 48 8b 7b 78 e8 af 39 0f 00 4c 8d b3 d0 00 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 72 31 1a 00 4d 8b 36 <4d> 85 f6 74 37 4c 89 f7 be 04 00 00 00 e8 fd 33 1a 00 bd ff ff ff
RSP: 0018:ffffc90006c677c8 EFLAGS: 00000246
RAX: 1ffff11022cfa10a RBX: ffff8881167d0780 RCX: 1c7255831191d500
RDX: 0000000000000000 RSI: ffffffff8be28be0 RDI: ffffffff8be28ba0
RBP: 0000000000000000 R08: ffff8881167d0803 R09: 1ffff11022cfa100
R10: dffffc0000000000 R11: ffffed1022cfa101 R12: dffffc0000000000
R13: 0000000000000022 R14: 0000000000000000 R15: ffff8881167d0780
 exit_mmap+0x53f/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x22e0
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce65d84bd3
Code: Unable to access opcode bytes at 0x7fce65d84ba9.
RSP: 002b:00007ffd0fb74578 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000002367 RCX: 00007fce65d84bd3
RDX: 0000000040000000 RSI: 00007ffd0fb7458c RDI: 00000000ffffffff
RBP: 00007ffd0fb7458c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
