rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P27952/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=96197, q=19 ncpus=2)
task:syz.1.9868      state:R  running task     stack:25536 pid:27952 tgid:27952 ppid:5853   task_flags:0x40004c flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_reschedule_ipi+0x1a/0x20
RIP: 0010:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 7b d1 02 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900030df530 EFLAGS: 00000206
RAX: cd272ec697896300 RBX: 0000000000000202 RCX: cd272ec697896300
RDX: 0000000000000001 RSI: ffffffff8dba6026 RDI: ffffffff8be33400
RBP: ffff88802ea70b18 R08: ffffc900030df6c7 R09: 0000000000000000
R10: ffffc900030df6b8 R11: fffff5200061bed9 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e139ee0 R15: ffff88802ea70000
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kmem_cache_free+0x2f6/0x400
 exit_mmap+0x53f/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f386c58ebe9
RSP: 002b:00007ffe65cfea98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f386c58ebe9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe65cfeafc R08: 0000000265cfeb8f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000cca
R13: 00000000000927c0 R14: 0000000000085583 R15: 00007ffe65cfeb50
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g96197 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:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 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: 27947 Comm: syz.2.9866 Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094-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:mark_lock+0xa3/0x190
Code: 4f ba 8d 48 c7 c6 db a2 a9 8d e8 b8 be e5 ff 90 0f 0b 90 90 90 31 c9 4c 89 fe 4c 89 f7 b8 01 00 00 00 85 69 60 74 10 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 41 a0 de 09 cc 49 89 fe 49 89 f7 e8 35 b1
RSP: 0018:ffffc900001e0b08 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffffffff935473f8
RDX: 0000000000000008 RSI: ffff88802087e130 RDI: ffff88802087d640
RBP: 0000000000000100 R08: 0000000000000000 R09: ffffffff899a60c4
R10: dffffc0000000000 R11: ffffffff899a6000 R12: ffffffffffffff03
R13: 0000000000000003 R14: ffff88802087e130 R15: 0000000000000000
FS:  000055556b54e500(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000043dfc000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __lock_acquire+0x6a8/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 advance_sched+0xc4/0xc90
 __hrtimer_run_queues+0x52c/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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf c7 ea 09 e8 3a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900031bf7d8 EFLAGS: 00000286
RAX: f0841655c52a7a00 RBX: 0000000000000000 RCX: f0841655c52a7a00
RDX: 0000000000000000 RSI: ffffffff8d9b6dc6 RDI: ffffffff8be33400
RBP: ffffc900031bf830 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffff88802087d640
R13: dffffc0000000000 R14: ffff88801bb6d640 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 do_nanosleep+0x191/0x600
 hrtimer_nanosleep+0x169/0x360
 __se_sys_clock_nanosleep+0x2f1/0x380
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a455c14a5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffc98a40d10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f8a457b5fa0 RCX: 00007f8a455c14a5
RDX: 00007ffc98a40d50 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f8a457b7da0 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000008583c
R13: 00007f8a457b6180 R14: ffffffffffffffff R15: 00007ffc98a40e90
 </TASK>
