rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 0-....
 } 2684 jiffies s: 8917 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):

Sending NMI from CPU 1 to CPUs 0:
lowmem_reserve[]: 0 0 3915 3915
Node 0 
NMI backtrace for cpu 0
CPU: 0 PID: 597 Comm: kworker/0:2 Not tainted 6.8.0-rc6-syzkaller-00098-ga560a5672826 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:411
Code: b1 c5 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 8c b2 13 ff eb a6 e8 e5 b2 13 ff eb e3
RSP: 0018:ffffc90000007370 EFLAGS: 00000002
RAX: dffffc0000000060 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82883460 RDI: ffffffff8c1ab320
RBP: ffffffff8c1ab2e0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 000000000000000a R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff18356b6 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83bb3b8988 CR3: 0000000007c9d000 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:2081
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3366 [inline]
 serial8250_console_write+0xc79/0x1060 drivers/tty/serial/8250/8250_port.c:3444
 console_emit_next_record kernel/printk/printk.c:2901 [inline]
 console_flush_all+0x4d8/0xd60 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_node mm/show_mem.c:29 [inline]
 show_free_areas+0xdc1/0x2140 mm/show_mem.c:304
 __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+0x5c9/0x840 drivers/input/input.c:161
 input_event_dispose+0x377/0x630 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+0x193/0x590 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x759/0xaa0 kernel/time/timer.c:2038
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2051
 __do_softirq+0x20a/0x8c1 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+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:console_flush_all+0xa11/0xd60 kernel/printk/printk.c:2973
Code: e8 84 7d 23 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 92 a1 1c 00 48 85 db 0f 85 7c 01 00 00 e8 f4 a5 1c 00 fb 48 8b 04 24 <4c> 89 fa 83 e2 07 0f b6 00 38 d0 7f 08 84 c0 0f 85 55 02 00 00 41
RSP: 0018:ffffc90001a5f5b8 EFLAGS: 00000246
RAX: fffff5200034bede RBX: 0000000000000000 RCX: ffffc9000d731000
RDX: 0000000000040000 RSI: ffffffff81313fdc RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000006 R12: 0000000000000001
R13: ffffffff883606d8 R14: ffffffff88360680 R15: ffffc90001a5f6f0
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
 dev_vprintk_emit drivers/base/core.c:4864 [inline]
 dev_printk_emit+0xfb/0x140 drivers/base/core.c:4875
 __dev_printk+0xf5/0x270 drivers/base/core.c:4887
 _dev_info+0xe5/0x120 drivers/base/core.c:4933
 usb_disconnect+0xec/0x910 drivers/usb/core/hub.c:2278
 hub_port_connect drivers/usb/core/hub.c:5352 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5652 [inline]
 port_event drivers/usb/core/hub.c:5812 [inline]
 hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5894
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243
 </TASK>
Normal free:2971772kB boost:0kB min:6100kB low:10108kB high:14116kB reserved_highatomic:0KB active_anon:28164kB inactive_anon:113948kB active_file:16412kB inactive_file:169284kB unevictable:0kB writepending:40kB present:5242880kB managed:4009928kB mlocked:0kB bounce:0kB free_pcp:3744kB local_pcp:3052kB 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: 125*4kB (ME) 43*8kB (UME) 99*16kB (UME) 116*32kB (UME) 160*64kB (UME) 157*128kB (UME) 62*256kB (UME) 46*512kB (UM) 20*1024kB (UM) 10*2048kB (ME) 697*4096kB (ME) = 2971772kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
67733 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
369994 pages reserved
Mem-Info:
active_anon:7041 inactive_anon:28487 isolated_anon:0
 active_file:4103 inactive_file:42321 isolated_file:0
 unevictable:0 dirty:10 writeback:0
 slab_reclaimable:6049 slab_unreclaimable:68260
 mapped:19274 shmem:21309 pagetables:638
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1466522 free_pcp:1851 free_cma:0
Node 0 active_anon:28164kB inactive_anon:113948kB active_file:16412kB inactive_file:169284kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:77096kB dirty:40kB writeback:0kB shmem:85236kB writeback_tmp:0kB kernel_stack:4004kB pagetables:2552kB 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 6727 6727
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:2882940kB mlocked:0kB bounce:0kB free_pcp:3492kB local_pcp:64kB free_cma:0kB
lowmem_reserve[]: 0 0 3915 3915
Node 0 Normal free:2971280kB boost:0kB min:6100kB low:10108kB high:14116kB reserved_highatomic:0KB active_anon:28164kB inactive_anon:113948kB active_file:16412kB inactive_file:169284kB unevictable:0kB writepending:40kB present:5242880kB managed:4009928kB mlocked:0kB bounce:0kB free_pcp:3912kB local_pcp:3052kB 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: 74*4kB (E) 37*8kB (UME) 98*16kB (ME) 109*32kB (UME) 160*64kB (UME) 157*128kB (UME) 62*256kB (UME) 46*512kB (UM) 20*1024kB (UM) 10*2048kB (ME) 697*4096kB (ME) = 2971280kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
67733 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
369994 pages reserved
Mem-Info:
active_anon:7041 inactive_anon:28487 isolated_anon:0
 active_file:4103 inactive_file:42321 isolated_file:0
 unevictable:0 dirty:10 writeback:0
 slab_reclaimable:6049 slab_unreclaimable:68286
 mapped:19274 shmem:21309 pagetables:638
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1466522 free_pcp:1829 free_cma:0
Node 0 active_anon:28164kB inactive_anon:113948kB active_file:16412kB inactive_file:169284kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:77096kB dirty:40kB writeback:0kB shmem:85236kB writeback_tmp:0kB kernel_stack:4004kB pagetables:2552kB 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 6727 6727
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:2882940kB mlocked:0kB bounce:0kB free_pcp:3492kB local_pcp:64kB free_cma:0kB
lowmem_reserve[]: 0 0 3915 3915
Node 0 Normal free:2971280kB boost:0kB min:6100kB low:10108kB high:14116kB reserved_highatomic:0KB active_anon:28164kB inactive_anon:113948kB active_file:16412kB inactive_file:169284kB unevictable:0kB writepending:40kB present:5242880kB managed:4009928kB mlocked:0kB bounce:0kB free_pcp:3816kB local_pcp:3052kB 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: 74*4kB (E) 37*8kB (UME) 98*16kB (ME) 109*32kB (UME) 160*64kB (UME) 157*128kB (UME) 62*256kB (UME) 46*512kB (UM) 20*1024kB (UM) 10*2048kB (ME) 697*4096kB (ME) = 2971280kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
67733 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
369994 pages reserved
usb 2-1: new high-speed USB device number 114 using dummy_hcd
usb 2-1: Using ep0 maxpacket: 8
usb 2-1: config 179 has an invalid interface number: 65 but max is 0
usb 2-1: config 179 has no interface number 0
usb 2-1: config 179 interface 65 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7
usb 2-1: config 179 interface 65 altsetting 0 endpoint 0xF has invalid maxpacket 1025, setting to 1024
usb 2-1: config 179 interface 65 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7
usb 2-1: config 179 interface 65 altsetting 0 endpoint 0x83 has invalid maxpacket 41728, setting to 1024
usb 2-1: config 179 interface 65 altsetting 0 has 2 endpoint descriptors, different from the interface descriptor's value: 23
usb 2-1: New USB device found, idVendor=12ab, idProduct=90a3, bcdDevice=1e.eb
usb 2-1: New USB device strings: Mfr=65, Product=122, SerialNumber=0
usb 2-1: Product: syz
usb 2-1: Manufacturer: syz
xpad 2-1:179.65: xpad_irq_in - usb_submit_urb failed with result -19