rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 0-....
 } 2688 jiffies s: 11689 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):

Sending NMI from CPU 1 to CPUs 0:
lowmem_reserve[]: 0 0 3923 3923
NMI backtrace for cpu 0
CPU: 0 PID: 14827 Comm: syz-executor.3 Not tainted 6.5.0-rc6-syzkaller-00153-g78e0ea427754 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:416
Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 18 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 e8 f5 43 16 ff eb a4 e8 4e 44 16 ff eb e1 66
RSP: 0018:ffffc90000007388 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: ffffffff8280bf75 RDI: ffffffff8c1ddc60
RBP: ffffffff8c1ddc20 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8c1ddc70 R15: 00000000000000d0
FS:  00007fc20e3d96c0(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee28000 CR3: 0000000117581000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 serial_out drivers/tty/serial/8250/8250.h:122 [inline]
 serial8250_clear_IER+0xea/0x150 drivers/tty/serial/8250/8250_port.c:712
 serial8250_console_write+0x1e9/0x1060 drivers/tty/serial/8250/8250_port.c:3409
 console_emit_next_record kernel/printk/printk.c:2877 [inline]
 console_flush_all+0x4c8/0xf50 kernel/printk/printk.c:2933
 console_unlock+0xc6/0x1f0 kernel/printk/printk.c:3007
 vprintk_emit+0x1c5/0x640 kernel/printk/printk.c:2307
 vprintk+0x89/0xa0 kernel/printk/printk_safe.c:50
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 __show_free_areas+0x1239/0x2140 mm/show_mem.c:352
 __show_mem+0x34/0x140 mm/show_mem.c:409
 k_spec drivers/tty/vt/keyboard.c:667 [inline]
 k_spec+0xea/0x140 drivers/tty/vt/keyboard.c:656
 kbd_keycode drivers/tty/vt/keyboard.c:1524 [inline]
 kbd_event+0xcc8/0x17c0 drivers/tty/vt/keyboard.c:1543
 input_to_handler+0x382/0x4c0 drivers/input/input.c:132
 input_pass_values.part.0+0x536/0x7a0 drivers/input/input.c:161
 input_pass_values drivers/input/input.c:148 [inline]
 input_event_dispose+0x5ee/0x770 drivers/input/input.c:378
 input_handle_event+0x11c/0xd80 drivers/input/input.c:406
 input_repeat_key+0x251/0x340 drivers/input/input.c:2263
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x20b/0x94e kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x8e/0xb0 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:console_flush_all+0x9b6/0xf50 kernel/printk/printk.c:2939
Code: 30 c7 22 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 8e 21 1c 00 48 85 db 0f 85 94 03 00 00 e8 f0 25 1c 00 fb 48 8b 44 24 08 <48> 8b 14 24 0f b6 00 83 e2 07 38 d0 7f 08 84 c0 0f 85 9d 04 00 00
RSP: 0018:ffffc9000acb7af0 EFLAGS: 00000246
RAX: fffff52001596f89 RBX: 0000000000000000 RCX: ffffc900021e2000
RDX: 0000000000040000 RSI: ffffffff813025d0 RDI: 0000000000000007
RBP: ffffffff88347b00 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000001
R13: ffffffff88347b58 R14: dffffc0000000000 R15: 0000000000000001
 console_unlock+0xc6/0x1f0 kernel/printk/printk.c:3007
 vprintk_emit+0x1c5/0x640 kernel/printk/printk.c:2307
 vprintk+0x89/0xa0 kernel/printk/printk_safe.c:50
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 usb_gadget_register_driver_owner+0x1c2/0x2d0 drivers/usb/gadget/udc/core.c:1684
 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:548 [inline]
 raw_ioctl+0x172f/0x2b80 drivers/usb/gadget/legacy/raw_gadget.c:1255
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc20f09884b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fc20e3d6fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc20f09884b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003
RBP: 00007fc20e3d8070 R08: 0000000000000010 R09: 00332e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc20e3d7040 R14: 00000000200000c0 R15: 00007fc20f2dd3f0
 </TASK>

Node 0 Normal free:2826684kB boost:0kB min:6112kB low:10128kB high:14144kB reserved_highatomic:0KB active_anon:2060kB inactive_anon:60688kB active_file:19204kB inactive_file:162384kB unevictable:0kB writepending:0kB present:5242880kB managed:4018128kB mlocked:0kB bounce:0kB free_pcp:2476kB local_pcp:1576kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB
Node 0 DMA32: 3*4kB (M) 1*8kB (M) 2*16kB (M) 3*32kB (M) 3*64kB (M) 3*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 2*2048kB (M) 701*4096kB (M) = 2879700kB
Node 0 Normal: 1020*4kB (ME) 818*8kB (UME) 324*16kB (ME) 44*32kB (ME) 218*64kB (ME) 118*128kB (ME) 76*256kB (ME) 54*512kB (UME) 29*1024kB (ME) 16*2048kB (UM) 652*4096kB (M) = 2826432kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
50170 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367867 pages reserved
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
raw-gadget.5 gadget.1: ignoring, device is not running
Mem-Info:
active_anon:513 inactive_anon:15007 isolated_anon:0
 active_file:4801 inactive_file:40596 isolated_file:0
 unevictable:0 dirty:0 writeback:0
 slab_reclaimable:9553 slab_unreclaimable:88590
 mapped:17903 shmem:4772 pagetables:440
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1435004 free_pcp:3294 free_cma:0
Node 0 active_anon:2052kB inactive_anon:60028kB active_file:19204kB inactive_file:162384kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:71612kB dirty:0kB writeback:0kB shmem:19088kB writeback_tmp:0kB kernel_stack:4376kB pagetables:1760kB sec_pagetables:0kB all_unreclaimable? no
Node 0 DMA free:15360kB boost:0kB min:20kB low:32kB high:44kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2812 6735 6735
Node 0 DMA32 free:2879700kB boost:0kB min:4380kB low:7256kB high:10132kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2883248kB mlocked:0kB bounce:0kB free_pcp:3548kB local_pcp:64kB free_cma:0kB
lowmem_reserve[]: 0 0 3923 3923
Node 0 Normal free:2844956kB boost:0kB min:6112kB low:10128kB high:14144kB reserved_highatomic:0KB active_anon:2052kB inactive_anon:60028kB active_file:19204kB inactive_file:162384kB unevictable:0kB writepending:0kB present:5242880kB managed:4018128kB mlocked:0kB bounce:0kB free_pcp:9628kB local_pcp:4580kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB
Node 0 DMA32: 3*4kB (M) 1*8kB (M) 2*16kB (M) 3*32kB (M) 3*64kB (M) 3*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 2*2048kB (M) 701*4096kB (M) = 2879700kB
Node 0 Normal: 1007*4kB (UME) 828*8kB (UME) 386*16kB (UME) 425*32kB (UME) 275*64kB (UME) 131*128kB (UME) 78*256kB (UME) 53*512kB (ME) 29*1024kB (ME) 16*2048kB (UM) 652*4096kB (M) = 2844956kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
50169 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367867 pages reserved
usb 4-1: USB disconnect, device number 121