rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
0-....
} 2695 jiffies s: 4121 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 0*4kB
NMI backtrace for cpu 0
CPU: 0 PID: 7933 Comm: syz-executor.5 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:ffffc900000073a8 EFLAGS: 00000002
RAX: 0000000000000020 RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff82849455 RDI: ffffffff8c156ee0
RBP: ffffffff8c156ea0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000000
R13: 0000000000000020 R14: ffffffff828493f0 R15: 0000000000000000
FS: 00007f53681e86c0(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53690aa000 CR3: 000000011daf6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0x1675/0x2140 mm/show_mem.c:384
__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
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:ffffc90010227af0 EFLAGS: 00000246
RAX: fffff52002044f89 RBX: 0000000000000000 RCX: ffffc90003014000
RDX: 0000000000040000 RSI: ffffffff813104ba RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 205d304320202020 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: 0033:0x7f5368e6584b
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:00007f53681e5fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f5368e6584b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007f53681e7070 R08: 0000000000000010 R09: 00352e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f53681e6040 R14: 0000000020000040 R15: 00007f53690a9b88
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) 1*2048kB (M) 702*4096kB (M) = 2881496kB
Node 0 Normal: 1512*4kB (UME) 728*8kB (UME) 156*16kB (UME) 300*32kB (UME) 107*64kB (UME) 88*128kB (UME) 85*256kB (UM) 44*512kB (ME) 28*1024kB (UME) 14*2048kB (ME) 712*4096kB (M) = 3060064kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
48514 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:303 inactive_anon:12619 isolated_anon:0
active_file:4323 inactive_file:40548 isolated_file:0
unevictable:0 dirty:0 writeback:0
slab_reclaimable:4678 slab_unreclaimable:65901
mapped:6866 shmem:3643 pagetables:298
sec_pagetables:0 bounce:0
kernel_misc_reclaimable:0
free:1492831 free_pcp:1987 free_cma:0
Node 0 active_anon:1212kB inactive_anon:50476kB active_file:17292kB inactive_file:162192kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:27464kB dirty:0kB writeback:0kB shmem:14572kB writeback_tmp:0kB kernel_stack:3924kB pagetables:1192kB 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:2881496kB 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:3700kB local_pcp:2792kB free_cma:0kB
lowmem_reserve[]: 0 0 3924 3924
Node 0 Normal free:3074468kB boost:0kB min:6108kB low:10124kB high:14140kB reserved_highatomic:0KB active_anon:1212kB inactive_anon:50476kB active_file:17292kB inactive_file:162192kB unevictable:0kB writepending:0kB present:5242880kB managed:4018384kB mlocked:0kB bounce:0kB free_pcp:4244kB local_pcp:3192kB 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) 1*2048kB (M) 702*4096kB (M) = 2881496kB
Node 0 Normal: 2561*4kB (UME) 938*8kB (UME) 240*16kB (UME) 375*32kB (UME) 135*64kB (UME) 100*128kB (UME) 89*256kB (UM) 45*512kB (UME) 28*1024kB (UME) 14*2048kB (ME) 712*4096kB (M) = 3074548kB
Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB
48514 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 6-1: USB disconnect, device number 10