rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 0-....
 } 2649 jiffies s: 6553 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: 11172 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:418
Code: b3 c7 fe 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 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 3c 1e 15 ff eb a6 e8 95 1e 15 ff eb e3
RSP: 0018:ffffc90000007370 EFLAGS: 00000002
RAX: dffffc0000000060 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82865d00 RDI: ffffffff8c175f60
RBP: ffffffff8c175f20 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff182ec3e R15: dffffc0000000000
FS:  00007f76757a66c0(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7676668000 CR3: 000000011c8bb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 serial_in drivers/tty/serial/8250/8250.h:117 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
 wait_for_lsr+0xd7/0x180 drivers/tty/serial/8250/8250_port.c:2088
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3373 [inline]
 serial8250_console_write+0xc79/0x1060 drivers/tty/serial/8250/8250_port.c:3451
 console_emit_next_record kernel/printk/printk.c:2901 [inline]
 console_flush_all+0x4d5/0xd50 kernel/printk/printk.c:2967
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 show_free_areas+0x1257/0x2140 mm/show_mem.c:350
 __show_mem+0x34/0x140 mm/show_mem.c:406
 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+0x52f/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+0x193/0x580 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+0x20a/0x94b 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:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_flush_all+0xa0c/0xd50 kernel/printk/printk.c:2973
Code: e8 59 53 23 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 b7 98 1c 00 48 85 db 0f 85 74 01 00 00 e8 19 9d 1c 00 fb 48 8b 04 24 <4c> 89 fa 83 e2 07 0f b6 00 38 d0 7f 08 84 c0 0f 85 4b 02 00 00 41
RSP: 0018:ffffc9001009fb10 EFLAGS: 00000293
RAX: fffff52002013f89 RBX: 0000000000000000 RCX: ffffffff81317359
RDX: ffff8881042b1d00 RSI: ffffffff81317367 RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000001
R13: ffffffff88356e18 R14: ffffffff88356dc0 R15: ffffc9001009fc48
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 usb_gadget_register_driver_owner+0x1c2/0x2d0 drivers/usb/gadget/udc/core.c:1695
 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline]
 raw_ioctl+0x172f/0x2b80 drivers/usb/gadget/legacy/raw_gadget.c:1306
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f767642384b
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:00007f76757a3fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f767642384b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007f76757a5070 R08: 0000000000000010 R09: 00302e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f76757a4040 R14: 0000000020000000 R15: 00007f7676667b88
 </TASK>
Node 0 Normal free:2847948kB boost:0kB min:6112kB low:10128kB high:14144kB reserved_highatomic:0KB active_anon:1592kB inactive_anon:52056kB active_file:18284kB inactive_file:161852kB unevictable:0kB writepending:0kB present:5242880kB managed:4018128kB mlocked:0kB bounce:0kB free_pcp:1952kB local_pcp:976kB 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: 2*4kB (M) 0*8kB 1*16kB (M) 2*32kB (M) 2*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 2*2048kB (M) 701*4096kB (M) = 2879448kB
Node 0 Normal: 443*4kB (ME) 648*8kB (ME) 306*16kB (UME) 276*32kB (ME) 146*64kB (UME) 145*128kB (ME) 97*256kB (UM) 55*512kB (M) 22*1024kB (ME) 16*2048kB (UM) 657*4096kB (M) = 2847948kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
48540 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367904 pages reserved
raw-gadget.5 gadget.5: ignoring, device is not running
Mem-Info:
active_anon:374 inactive_anon:12598 isolated_anon:0
 active_file:4571 inactive_file:40463 isolated_file:0
 unevictable:0 dirty:0 writeback:0
 slab_reclaimable:4571 slab_unreclaimable:89102
 mapped:15373 shmem:3507 pagetables:561
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1435955 free_pcp:1854 free_cma:0
Node 0 active_anon:1496kB inactive_anon:50392kB active_file:18284kB inactive_file:161852kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:61492kB dirty:0kB writeback:0kB shmem:14028kB writeback_tmp:0kB kernel_stack:4420kB pagetables:2244kB 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:2879448kB 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:2883100kB mlocked:0kB bounce:0kB free_pcp:3652kB local_pcp:64kB free_cma:0kB
lowmem_reserve[]: 0 0 3923 3923
Node 0 Normal free:2849012kB boost:0kB min:6112kB low:10128kB high:14144kB reserved_highatomic:0KB active_anon:1496kB inactive_anon:50392kB active_file:18284kB inactive_file:161852kB unevictable:0kB writepending:0kB present:5242880kB managed:4018128kB mlocked:0kB bounce:0kB free_pcp:3764kB local_pcp:1588kB 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: 2*4kB (M) 0*8kB 1*16kB (M) 2*32kB (M) 2*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 2*2048kB (M) 701*4096kB (M) = 2879448kB
Node 0 Normal: 567*4kB (UME) 658*8kB (UME) 328*16kB (UME) 283*32kB (UM) 146*64kB (UME) 145*128kB (ME) 97*256kB (M) 55*512kB (M) 22*1024kB (ME) 16*2048kB (UM) 657*4096kB (M) = 2849100kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
48541 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367904 pages reserved
Mem-Info:
active_anon:374 inactive_anon:12598 isolated_anon:0
 active_file:4571 inactive_file:40463 isolated_file:0
 unevictable:0 dirty:0 writeback:0
 slab_reclaimable:4571 slab_unreclaimable:89020
 mapped:15373 shmem:3507 pagetables:561
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1436336 free_pcp:2531 free_cma:0
Node 0 active_anon:1496kB inactive_anon:50392kB active_file:18284kB inactive_file:161852kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:61492kB dirty:0kB writeback:0kB shmem:14028kB writeback_tmp:0kB kernel_stack:4392kB pagetables:2244kB 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:2879448kB 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:2883100kB mlocked:0kB bounce:0kB free_pcp:3652kB local_pcp:64kB free_cma:0kB
lowmem_reserve[]: 0 0 3923 3923
Node 0 Normal free:2850536kB boost:0kB min:6112kB low:10128kB high:14144kB reserved_highatomic:0KB active_anon:1496kB inactive_anon:50392kB active_file:18284kB inactive_file:161852kB unevictable:0kB writepending:0kB present:5242880kB managed:4018128kB mlocked:0kB bounce:0kB free_pcp:6472kB local_pcp:4316kB 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: 2*4kB (M) 0*8kB 1*16kB (M) 2*32kB (M) 2*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 2*2048kB (M) 701*4096kB (M) = 2879448kB
Node 0 Normal: 632*4kB (UME) 651*8kB (UME) 339*16kB (UME) 302*32kB (UM) 149*64kB (UME) 147*128kB (ME) 97*256kB (M) 55*512kB (M) 22*1024kB (ME) 16*2048kB (UM) 657*4096kB (M) = 2850536kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
48541 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367904 pages reserved