rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2665 jiffies s: 46013 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):

Sending NMI from CPU 1 to CPUs 0:
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
NMI backtrace for cpu 0
CPU: 0 PID: 9948 Comm: syz-executor.3 Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:vsnprintf+0x901/0x1da0
Code: 08 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 4c 12 00 00 44 89 2a 49 bd 00 00 00 00 00 fc ff df e9 f0 05 00 00 <4c> 8b 74 24 28 4c 3b 74 24 18 0f 83 01 06 00 00 e8 fa b0 16 f6 4c
RSP: 0000:ffffc90000006d80 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888018739e00
RDX: ffffc90000006ee0 RSI: ffffffff8f94f7e0 RDI: 0000000000000000
RBP: ffffc90000006e70 R08: 0000000000000001 R09: ffffffff8b7f5df4
R10: 0000000000000012 R11: ffff888018739e00 R12: ffffffff8bcb7f81
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8bcb7f80
FS:  000055556f83e480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31725000 CR3: 000000006bb60000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 sprintf+0xda/0x120 lib/vsprintf.c:3028
 print_time kernel/printk/printk.c:1327 [inline]
 info_print_prefix+0x16b/0x310 kernel/printk/printk.c:1353
 record_print_text kernel/printk/printk.c:1402 [inline]
 printk_get_next_message+0x6da/0xbe0 kernel/printk/printk.c:2855
 console_emit_next_record kernel/printk/printk.c:2895 [inline]
 console_flush_all+0x410/0xfd0 kernel/printk/printk.c:2994
 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3063
 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345
 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4951
 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4962
 _dev_err+0x122/0x170 drivers/base/core.c:5017
 wdm_int_callback+0x41f/0xac0 drivers/usb/class/cdc-wdm.c:269
 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648
 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_lockdep_current_cpu_online+0x0/0x120 kernel/rcu/tree.c:4653
Code: 8e e8 64 79 6c 03 e9 53 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 53 65 8b 0d 98 3b 87 7e b0 01 f7 c1 00 00
RSP: 0000:ffffc90005387080 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888018739e00
RDX: ffff888018739e00 RSI: ffffffff8c1ff1e0 RDI: ffffffff8c1ff1a0
RBP: ffff88806ea43280 R08: ffffffff8a2ef400 R09: 0000000000000000
R10: ffffc90005387140 R11: fffff52000a70e2e R12: ffffc90005387148
R13: ffffc90005387140 R14: dffffc0000000000 R15: ffff88802eaed300
 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
 rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
 fib6_node_lookup_1+0x159/0x8b0 net/ipv6/ip6_fib.c:1583
 fib6_node_lookup+0x14a/0x250 net/ipv6/ip6_fib.c:1652
 fib6_table_lookup+0xc6/0xbb0 net/ipv6/route.c:2189
 ip6_pol_route+0x273/0x15d0 net/ipv6/route.c:2229
 pol_lookup_func include/net/ip6_fib.h:616 [inline]
 fib6_rule_lookup+0x286/0x790 net/ipv6/fib6_rules.c:116
 ip6_route_output_flags_noref net/ipv6/route.c:2637 [inline]
 ip6_route_output_flags+0x38e/0x610 net/ipv6/route.c:2649
 ip6_route_output include/net/ip6_route.h:93 [inline]
 icmpv6_rt_has_prefsrc+0x50/0x3d0 net/ipv6/icmp.c:242
 icmp6_send+0xd5a/0x2070 net/ipv6/icmp.c:556
 __icmpv6_send include/linux/icmpv6.h:28 [inline]
 icmpv6_send include/linux/icmpv6.h:49 [inline]
 ip6_link_failure+0x3c/0x4f0 net/ipv6/route.c:2797
 dst_link_failure include/net/dst.h:429 [inline]
 ndisc_error_report+0x114/0x160 net/ipv6/ndisc.c:729
 neigh_invalidate+0x244/0x470 net/core/neighbour.c:1061
 neigh_timer_handler+0x8a5/0xfd0 net/core/neighbour.c:1148
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers kernel/time/timer.c:2417 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
 run_timer_base kernel/time/timer.c:2437 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7fe009c38b80
Code: 56 cb ca 00 00 0f 85 6f ff ff ff 44 0f b6 64 24 0f 41 89 eb 41 89 e8 44 8d 55 04 89 e8 89 c7 81 e7 ff 1f 00 00 49 8b 54 fd 00 <49> 39 d0 0f 84 58 ff ff ff 48 85 d2 0f 84 6e 01 00 00 83 c0 01 44
RSP: 002b:00007fe009edfaa0 EFLAGS: 00000202
RAX: 00000000820f9cf4 RBX: ffffffff820f9150 RCX: 00007fe009401008
RDX: 00000000820f9cf4 RSI: 0000000080000000 RDI: 0000000000001cf4
RBP: ffffffff820f9cf4 R08: 00000000820f9cf4 R09: 0000000000000003
R10: 00000000820f9cf8 R11: 00000000820f9cf4 R12: 0000000000000001
R13: 00007fe009da0000 R14: 00000000000004be R15: 00007fe009db4038
 </TASK>
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
vkms_vblank_simulate: vblank timer overrun
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
vkms_vblank_simulate: vblank timer overrun
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes
cdc_wdm 4-1:1.0: nonzero urb status received: -71
cdc_wdm 4-1:1.0: wdm_int_callback - 0 bytes