rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (7 ticks this GP) idle=f19/1/0x4000000000000002 softirq=18058/18058 fqs=5245 
	(detected by 1, t=10502 jiffies, g=25725, q=1364)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7771 Comm: syz.3.840 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:perf_trace_preemptirq_template+0x2ee/0x380 include/trace/events/preemptirq.h:14
Code: e8 f7 e4 f9 ff eb 05 e8 f0 e4 f9 ff 48 c7 44 24 40 0e 36 e0 45 48 8b 44 24 38 48 c7 04 18 00 00 00 00 c7 44 18 08 00 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 3b 84 24 a0 00 00 00 75 28 48 8d 65
RSP: 0018:ffffc90000007800 EFLAGS: 00000086
RAX: 1ffff92000000f08 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000008
RBP: ffffc900000078e8 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffffe8ffff62f000
R13: ffff8880b90351c8 R14: ffffe8ffff62f00c R15: ffffffff8c1674c0
FS:  00007f73c8e666c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f073464ef98 CR3: 0000000051450000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 ed 11 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000079e0 EFLAGS: 00000206
RAX: 6dbab0d3f90eb300 RBX: 1ffff92000000f40 RCX: 6dbab0d3f90eb300
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800
RBP: ffffc90000007ac0 R08: dffffc0000000000 R09: fffffbfff1ff5438
R10: fffffbfff1ff5438 R11: 1ffffffff1ff5437 R12: ffffffff8c120c00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 hsr_announce+0x294/0x300 net/hsr/hsr_device.c:410
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:qlist_free_all+0x2a/0x90 mm/kasan/quarantine.c:174
Code: 41 57 41 56 41 55 41 54 53 4c 8b 3f 4d 85 ff 74 6d 49 89 f6 48 89 fb 49 bc 00 00 00 00 00 ea ff ff eb 1a 4c 01 e0 48 8b 70 18 <4d> 8b 2f 4c 89 ff e8 db 03 00 00 4d 89 ef 4d 85 ed 74 2a 4c 89 f6
RSP: 0018:ffffc9000360ecc0 EFLAGS: 00000286
RAX: ffffea0001318400 RBX: ffffc9000360ecf0 RCX: ffffea0001318400
RDX: ffffc9000d111000 RSI: ffff888016842140 RDI: 0000000000080000
RBP: ffffc9000360ef40 R08: ffff888051aca200 R09: 0000000080070002
R10: fffffbfff1ff541a R11: 1ffffffff1ff5419 R12: ffffea0000000000
R13: ffff88804c616000 R14: 0000000000000000 R15: ffff88804c616000
 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
 kmem_cache_zalloc include/linux/slab.h:728 [inline]
 __kernfs_new_node+0xd6/0x680 fs/kernfs/dir.c:593
 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669
 __kernfs_create_file+0x47/0x2e0 fs/kernfs/file.c:985
 sysfs_add_file_mode_ns+0x2d4/0x3a0 fs/sysfs/file.c:317
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x489/0xcf0 fs/sysfs/group.c:149
 internal_create_groups fs/sysfs/group.c:189 [inline]
 sysfs_create_groups+0x55/0x120 fs/sysfs/group.c:215
 device_add_groups drivers/base/core.c:2491 [inline]
 device_add_attrs+0x83/0x6a0 drivers/base/core.c:2639
 device_add+0x64b/0xfb0 drivers/base/core.c:3363
 netdev_register_kobject+0x176/0x310 net/core/net-sysfs.c:2014
 register_netdevice+0x1019/0x16b0 net/core/dev.c:10397
 __ip_tunnel_create+0x2bf/0x380 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x232/0x6b0 net/ipv4/ip_tunnel.c:1084
 ops_init+0x357/0x600 net/core/net_namespace.c:138
 setup_net+0x38d/0x9f0 net/core/net_namespace.c:333
 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:503
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x37d/0x3e0 kernel/nsproxy.c:178
 copy_process+0x180f/0x3e00 kernel/fork.c:2293
 kernel_clone+0x219/0x930 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x170/0x1c0 kernel/fork.c:2780
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f73cabff749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f73c8e65fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f73cae55fa0 RCX: 00007f73cabff749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004b200000
RBP: 00007f73cac83f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f73cae56038 R14: 00007f73cae55fa0 R15: 00007fff1a4f1718
 </TASK>