BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 11152 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x164/0xed0 kernel/locking/mutex.c:820
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
 __ipv6_dev_mc_inc+0x5c/0x9e4 net/ipv6/mcast.c:943
 ipv6_dev_mc_inc+0x2c/0x3c net/ipv6/mcast.c:981
 ipv6_add_dev+0xaf4/0x100c net/ipv6/addrconf.c:472
 addrconf_notify+0x42c/0xbe8 net/ipv6/addrconf.c:3662
 notifier_call_chain+0x1a4/0x624 kernel/notifier.c:85
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
 call_netdevice_notifiers_info+0xb8/0x120 net/core/dev.c:2249
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x1018/0x14b8 net/core/dev.c:11461
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1069 [inline]
 nsim_create+0x944/0xcec drivers/net/netdevsim/netdev.c:1151
 __nsim_dev_port_add+0x59c/0x95c drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x50/0x114 drivers/net/netdevsim/dev.c:1570
 nsim_drv_probe+0x758/0xa0c drivers/net/netdevsim/dev.c:1731
 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:420
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x29c/0x800 drivers/base/dd.c:709
 __driver_probe_device+0x1e0/0x34c drivers/base/dd.c:871
 driver_probe_device+0x6c/0x19c drivers/base/dd.c:901
 __device_attach_driver+0x194/0x2f0 drivers/base/dd.c:1029
 bus_for_each_drv+0x144/0x1dc drivers/base/bus.c:500
 __device_attach+0x248/0x390 drivers/base/dd.c:1101
 device_initial_probe+0x90/0xc8 drivers/base/dd.c:1156
 bus_probe_device+0x58/0x120 drivers/base/bus.c:613
 device_add+0x6cc/0x9f0 drivers/base/core.c:3706
 device_register+0x28/0x38 drivers/base/core.c:3788
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:471 [inline]
 new_device_store+0x2dc/0x5c0 drivers/net/netdevsim/bus.c:191
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:688
 ksys_write+0x12c/0x228 fs/read_write.c:740
 __do_sys_write fs/read_write.c:751 [inline]
 __se_sys_write fs/read_write.c:748 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:748
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
netdevsim netdevsim1 netdevsim0: renamed from eth0
8021q: adding VLAN 0 to HW filter on device netdevsim0
netdevsim netdevsim1 netdevsim1: renamed from eth1
8021q: adding VLAN 0 to HW filter on device netdevsim1