rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (11 ticks this GP) idle=77a4/1/0x4000000000000000 softirq=53335/53335 fqs=6
rcu: 	(detected by 0, t=10502 jiffies, g=55625, q=733 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13194 Comm: syz.3.2376 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:preempt_count_sub+0x49/0x170
Code: 84 c0 0f 85 c5 00 00 00 83 3d 82 bb b0 18 00 75 25 65 8b 05 c9 57 a5 11 89 c1 81 e1 ff ff ff 7f 39 cf 7f 2a 81 ff ff 00 00 00 <0f> 93 c1 84 c0 0f 95 c0 08 c8 74 58 65 8b 05 a4 57 a5 11 f7 df 65
RSP: 0018:ffffc90000a08b50 EFLAGS: 00000093
RAX: 0000000080010102 RBX: dffffc0000000000 RCX: 0000000000010102
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff88816e4eb300 R08: ffffffff9a6d87c3 R09: 1ffffffff34db0f8
R10: dffffc0000000000 R11: fffffbfff34db0f9 R12: ffff88823c628280
R13: ffff88823c628410 R14: ffffffff9a6d87c0 R15: dffffc0000000000
FS:  00007f296c2286c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01035ada40 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 _raw_spin_unlock_irqrestore+0x4c/0x80
 __hrtimer_run_queues+0x23a/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x44/0x3c0
Code: 8b 05 e0 4d 97 11 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 e3 4d 97 11 83 f8 08 0f 83 56 02 00 00 89 c0 48 0f a3 05 8c d1 8e 0e <73> 0d e8 45 f7 08 00 84 c0 0f 84 94 02 00 00 83 3d 46 04 8f 0e 00
RSP: 0018:ffffc90000a08e68 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88816cf01d80
RDX: 0000000000000100 RSI: ffffffff8980c896 RDI: ffffffff8e95cd60
RBP: 0000000000000000 R08: ffff88816e4eb15b R09: 1ffff1102dc9d62b
R10: dffffc0000000000 R11: ffffed102dc9d62c R12: ffff88816e4eb010
R13: ffffffff8980c896 R14: ffffffff8e95cd60 R15: ffff88816e4eb000
 net_tx_action+0xbf6/0xc30
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x93/0x3c0
Code: 0f 85 0d 02 00 00 65 4c 8b 3d 71 4d 97 11 41 83 bf 8c 0b 00 00 00 0f 85 f7 01 00 00 49 81 3e 80 03 fd 93 0f 84 ea 01 00 00 9c <5b> fa 48 c7 c7 4b 12 fc 8d e8 cf ee 06 0a 65 ff 05 e8 92 97 11 c7
RSP: 0018:ffffc900220a6d08 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffffff90d1d301 RCX: 0000000080000001
RDX: ffffc900220a6e01 RSI: ffffffff8c28aec0 RDI: ffffffff8c28ae80
RBP: dffffc0000000000 R08: ffffc900220a7190 R09: 0000000000000000
R10: ffffc900220a6e98 R11: fffff52004414dd5 R12: ffffc900220a71a0
R13: ffffffff8176f256 R14: ffffffff8e95cd60 R15: ffff88816cf01d80
 unwind_next_frame+0x1bba/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_unref_folios+0xcec/0x1480
 folios_put_refs+0x9ff/0xb40
 shmem_undo_range+0x52c/0x1660
 shmem_evict_inode+0x289/0xae0
 evict+0x61e/0xb10
 __dentry_kill+0x1a2/0x690
 finish_dput+0xc9/0x480
 __fput+0x691/0xa60
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x840
 exit_to_user_mode_loop+0x8c/0x4d0
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f296b39cdd9
Code: Unable to access opcode bytes at 0x7f296b39cdaf.
RSP: 002b:00007f296c228028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f296b616090 RCX: 00007f296b39cdd9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000007
RBP: 00007f296b432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f296b616128 R14: 00007f296b616090 R15: 00007fff03e06be8
 </TASK>
rcu: rcu_preempt kthread starved for 10490 jiffies! g55625 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:27968 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 13234 Comm: syz.5.2392 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0xfd4/0x13d0
Code: 89 ee 83 e6 01 31 ff e8 da 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 85 03 0c 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 6a 03 0c 00 eb e5 44 89
RSP: 0018:ffffc90021747ae0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88812103c148 RCX: ffff88811e950000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90021747c10 R08: ffffffff9030b3f7 R09: 1ffffffff206167e
R10: dffffc0000000000 R11: ffffffff81746300 R12: 1ffff110478c8169
R13: dffffc0000000000 R14: ffff88823c640b48 R15: 0000000000000001
FS:  00007f010438e6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0103472700 CR3: 0000000115b98000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 clock_was_set+0x70a/0x7d0
 do_settimeofday64+0x340/0x570
 __x64_sys_clock_settime+0x253/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f010359cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f010438e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f0103816180 RCX: 00007f010359cdd9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f0103632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0103816218 R14: 00007f0103816180 R15: 00007ffd40dd1de8
 </TASK>
