rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3035 jiffies s: 85341 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1174 Comm: kworker/0:2 Not tainted 6.11.0-rc7-syzkaller-00151-gd42f7708e27c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events request_firmware_work_func
RIP: 0010:unwind_next_frame+0x68b/0x23a0 arch/x86/kernel/unwind_orc.c:512
Code: 9e c2 84 c0 0f 95 c0 84 c2 0f 85 42 18 00 00 4c 89 fa 45 0f b6 6c 24 05 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 41 c0 ed 03 41 83 e5 01 38 d0 7f 08 84 c0 0f 85
RSP: 0018:ffffc90000007040 EFLAGS: 00000807
RAX: 0000000000000000 RBX: ffffc900000070c0 RCX: 0000000000000001
RDX: 1ffff92000000e1e RSI: ffffffff813cf51c RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000000 R12: ffffffff913f1dcc
R13: 0000000000000002 R14: ffffffff913f1dd0 R15: ffffc900000070f5
FS:  0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e5e8ff8 CR3: 000000000db7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2256 [inline]
 slab_free mm/slub.c:4477 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4598
 dummy_timer+0x1750/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1981
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5727
Code: c1 05 2a ba 98 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90000007960 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000000f2e RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8b4cda40 RDI: ffffffff8bb0fc00
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2d248e0
R10: ffffffff96924707 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8ddb9fe0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 ipv6_chk_mcast_addr+0x49/0x990 net/ipv6/mcast.c:1021
 ip6_mc_input+0x392/0xfd0 net/ipv6/ip6_input.c:523
 dst_input include/net/dst.h:460 [inline]
 dst_input include/net/dst.h:458 [inline]
 ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ipv6_rcv+0x45a/0x680 net/ipv6/ip6_input.c:310
 __netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5661
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5775
 process_backlog+0x443/0x15f0 net/core/dev.c:6108
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0xa92/0x1010 net/core/dev.c:6963