rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 1-....
 } 2659 jiffies s: 4053 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
lowmem_reserve[]: 0 0 3924 3924
NMI backtrace for cpu 1
CPU: 1 PID: 9173 Comm: syz-executor.4 Not tainted 6.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:424
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 e5 52 15 ff eb a4 e8 3e 53 15 ff eb e1 66
RSP: 0018:ffffc900001983a8 EFLAGS: 00000002
RAX: 0000000000000030 RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff82849455 RDI: ffffffff8c156ee0
RBP: ffffffff8c156ea0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d314320202020 R12: 0000000000000000
R13: 0000000000000030 R14: ffffffff828493f0 R15: 0000000000000000
FS:  00007f9b162cb6c0(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b1718e000 CR3: 0000000114c50000 CR4: 00000000003506e0
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_console_fifo_write drivers/tty/serial/8250/8250_port.c:3378 [inline]
 serial8250_console_write+0xd29/0x1060 drivers/tty/serial/8250/8250_port.c:3449
 console_emit_next_record kernel/printk/printk.c:2910 [inline]
 console_flush_all+0x4eb/0xfb0 kernel/printk/printk.c:2966
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2332
 show_free_areas+0x1257/0x2140 mm/show_mem.c:353
 __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+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+0x19e/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:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_flush_all+0x9e0/0xfb0 kernel/printk/printk.c:2972
Code: c6 18 23 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 94 68 1c 00 48 85 db 0f 85 97 03 00 00 e8 f6 6c 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 08 05 00 00
RSP: 0018:ffffc9000de17af0 EFLAGS: 00000246
RAX: fffff52001bc2f89 RBX: 0000000000000000 RCX: ffffc900050a2000
RDX: 0000000000040000 RSI: ffffffff813104ba RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 205d314320202020 R12: ffffffff88353f80
R13: 0000000000000001 R14: ffffffff88353fd8 R15: 0000000000000001
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2332
 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: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:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9b16f4884b
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:00007f9b162c8fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f9b16f4884b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000006
RBP: 00007f9b162ca070 R08: 0000000000000010 R09: 00342e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b162c9040 R14: 00000000200001c0 R15: 00007f9b1718dc58
 </TASK>
Node 0 Normal free:2854884kB boost:0kB min:6108kB low:10124kB high:14140kB reserved_highatomic:0KB active_anon:17924kB inactive_anon:39876kB active_file:17444kB inactive_file:162172kB unevictable:0kB writepending:16kB present:5242880kB managed:4018384kB mlocked:0kB bounce:0kB free_pcp:7152kB local_pcp:4128kB 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: 5*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 4*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 1*2048kB (M) 702*4096kB (M) = 2881748kB
Node 0 Normal: 557*4kB (ME) 546*8kB (ME) 200*16kB (ME) 73*32kB (ME) 76*64kB (ME) 127*128kB (ME) 88*256kB (UME) 49*512kB (ME) 31*1024kB (ME) 21*2048kB (ME) 659*4096kB (M) = 2854884kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
49524 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367316 pages reserved
Mem-Info:
active_anon:4477 inactive_anon:9701 isolated_anon:0
 active_file:4363 inactive_file:40543 isolated_file:0
 unevictable:0 dirty:6 writeback:0
 slab_reclaimable:4446 slab_unreclaimable:92914
 mapped:13286 shmem:4620 pagetables:379
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1444351 free_pcp:2125 free_cma:0
Node 0 active_anon:17908kB inactive_anon:38804kB active_file:17452kB inactive_file:162172kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:53144kB dirty:24kB writeback:0kB shmem:18480kB writeback_tmp:0kB kernel_stack:4116kB pagetables:1516kB 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 2814 6738 6738
Node 0 DMA32 free:2881748kB boost:0kB min:4380kB low:7260kB high:10140kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2885196kB mlocked:0kB bounce:0kB free_pcp:3448kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 3924 3924
Node 0 Normal free:2882068kB boost:0kB min:6108kB low:10124kB high:14140kB reserved_highatomic:0KB active_anon:17908kB inactive_anon:38804kB active_file:17452kB inactive_file:162172kB unevictable:0kB writepending:24kB present:5242880kB managed:4018384kB mlocked:0kB bounce:0kB free_pcp:5052kB local_pcp:5052kB 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: 5*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 4*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 1*2048kB (M) 702*4096kB (M) = 2881748kB
Node 0 Normal: 1055*4kB (UME) 675*8kB (UME) 370*16kB (UME) 391*32kB (UME) 139*64kB (UME) 166*128kB (UME) 95*256kB (UME) 50*512kB (UME) 31*1024kB (ME) 21*2048kB (ME) 659*4096kB (M) = 2882132kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
49526 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367316 pages reserved
usb 3-1: new high-speed USB device number 33 using dummy_hcd
usb 3-1: device descriptor read/64, error -71
usb 3-1: Using ep0 maxpacket: 32
usb 3-1: config index 0 descriptor too short (expected 35577, got 27)
usb 3-1: config 1 has too many interfaces: 92, using maximum allowed: 32
usb 3-1: config 1 has 1 interface, different from the descriptor's value: 92
usb 3-1: config 1 has no interface number 0
usb 3-1: config 1 interface 1 altsetting 0 endpoint 0x82 has an invalid bInterval 0, changing to 7
usb 3-1: config 1 interface 1 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 17
usb 3-1: New USB device found, idVendor=0e41, idProduct=5051, bcdDevice=d5.e8
usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Mem-Info:
active_anon:4482 inactive_anon:10311 isolated_anon:0
 active_file:4364 inactive_file:40543 isolated_file:0
 unevictable:0 dirty:19 writeback:0
 slab_reclaimable:4446 slab_unreclaimable:79268
 mapped:19725 shmem:4617 pagetables:535
 sec_pagetables:0 bounce:0
 kernel_misc_reclaimable:0
 free:1476317 free_pcp:1403 free_cma:0
Node 0 active_anon:17936kB inactive_anon:41192kB active_file:17456kB inactive_file:162172kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:78908kB dirty:76kB writeback:0kB shmem:18468kB writeback_tmp:0kB kernel_stack:4444kB pagetables:2224kB 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 2814 6738 6738
Node 0 DMA32 free:2881748kB boost:0kB min:4380kB low:7260kB high:10140kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2885196kB mlocked:0kB bounce:0kB free_pcp:3448kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 3924 3924
Node 0 Normal free:3008160kB boost:0kB min:6108kB low:10124kB high:14140kB reserved_highatomic:0KB active_anon:17936kB inactive_anon:41192kB active_file:17456kB inactive_file:162172kB unevictable:0kB writepending:76kB present:5242880kB managed:4018384kB mlocked:0kB bounce:0kB free_pcp:3376kB local_pcp:1428kB 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: 5*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 4*64kB (M) 2*128kB (M) 2*256kB (M) 2*512kB (M) 2*1024kB (M) 1*2048kB (M) 702*4096kB (M) = 2881748kB
Node 0 Normal: 14*4kB (UME) 495*8kB (ME) 229*16kB (UME) 219*32kB (UME) 345*64kB (UME) 354*128kB (UME) 216*256kB (UME) 111*512kB (UME) 56*1024kB (UME) 28*2048kB (UME) 659*4096kB (M) = 3008160kB
snd_usb_pod 3-1:1.1: Line 6 Pocket POD found
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
49524 total pagecache pages
0 pages in swap cache
Free swap  = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
367316 pages reserved
snd_usb_pod 3-1:1.1: Line 6 Pocket POD now attached
usb 5-1: USB disconnect, device number 50
usb 5-1: ath9k_htc: USB layer deinitialized
usb 5-1: new full-speed USB device number 51 using dummy_hcd
usb 5-1: no configurations
usb 5-1: can't read configurations, error -22
usb 5-1: new full-speed USB device number 52 using dummy_hcd
usb 5-1: no configurations
usb 5-1: can't read configurations, error -22
usb usb5-port1: attempt power cycle
usb 5-1: new full-speed USB device number 53 using dummy_hcd
usb 5-1: no configurations
usb 5-1: can't read configurations, error -22
usb 5-1: new full-speed USB device number 54 using dummy_hcd
usb 5-1: no configurations
usb 5-1: can't read configurations, error -22
usb usb5-port1: unable to enumerate USB device