BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 9155 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
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:3899 [inline]
 validate_chain kernel/locking/lockdep.c:3920 [inline]
 __lock_acquire+0xed4/0x2b08 kernel/locking/lockdep.c:5288
 lock_acquire+0x13c/0x320 kernel/locking/lockdep.c:5942
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x164/0x10b8 kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
 register_nexthop_notifier+0x28/0x88 net/ipv4/nexthop.c:4044
 nsim_fib_create+0x54c/0x888 drivers/net/netdevsim/fib.c:1585
 nsim_drv_probe+0x690/0xa1c drivers/net/netdevsim/dev.c:1634
 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:419
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x29c/0x800 drivers/base/dd.c:707
 __driver_probe_device+0x1e0/0x350 drivers/base/dd.c:869
 driver_probe_device+0x6c/0x19c drivers/base/dd.c:899
 __device_attach_driver+0x198/0x2f8 drivers/base/dd.c:1027
 bus_for_each_drv+0x144/0x1dc drivers/base/bus.c:500
 __device_attach+0x248/0x378 drivers/base/dd.c:1131
 device_initial_probe+0x8c/0xf4 drivers/base/dd.c:1190
 __bus_probe_device+0x58/0x120 drivers/base/bus.c:614
 bus_probe_device+0x20/0x30 drivers/base/bus.c:632
 device_add+0x6cc/0x9e0 drivers/base/core.c:3778
 device_register+0x28/0x38 drivers/base/core.c:3860
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:468 [inline]
 new_device_store+0x318/0x58c 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:145
 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __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+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606