BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 6588 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline] validate_chain kernel/locking/lockdep.c:3793 [inline] __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline] read_mems_allowed_begin include/linux/cpuset.h:153 [inline] get_any_partial mm/slub.c:2292 [inline] get_partial mm/slub.c:2334 [inline] ___slab_alloc+0x82c/0xec8 mm/slub.c:3131 __slab_alloc+0x74/0xd0 mm/slub.c:3240 slab_alloc_node mm/slub.c:3325 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc_lru+0x220/0x298 mm/slub.c:3390 alloc_inode_sb include/linux/fs.h:3245 [inline] alloc_inode fs/inode.c:263 [inline] new_inode_pseudo+0xdc/0x1cc fs/inode.c:1063 new_inode+0x38/0x174 fs/inode.c:1091 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x134/0x438 fs/debugfs/inode.c:432 debugfs_create_file_unsafe+0x60/0x78 fs/debugfs/inode.c:528 debugfs_create_mode_unsafe fs/debugfs/file.c:-1 [inline] debugfs_create_bool+0x88/0xa0 fs/debugfs/file.c:871 nsim_bpf_init+0x1b0/0x24c drivers/net/netdevsim/bpf.c:645 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:311 [inline] nsim_create+0x280/0x364 drivers/net/netdevsim/netdev.c:365 __nsim_dev_port_add+0x510/0x898 drivers/net/netdevsim/dev.c:1396 nsim_dev_port_add_all+0x4c/0x110 drivers/net/netdevsim/dev.c:1454 nsim_drv_probe+0x6b0/0x930 drivers/net/netdevsim/dev.c:1608 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:239 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x39c/0xae0 drivers/base/dd.c:639 __driver_probe_device+0x180/0x314 drivers/base/dd.c:785 driver_probe_device+0x78/0x330 drivers/base/dd.c:815 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:943 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:1015 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489 device_add+0xb04/0xf94 drivers/base/core.c:3697 device_register+0x28/0x38 drivers/base/core.c:3779 nsim_bus_dev_new drivers/net/netdevsim/bus.c:290 [inline] new_device_store+0x2c0/0x4f4 drivers/net/netdevsim/bus.c:167 bus_attr_store+0x80/0xa4 drivers/base/bus.c:124 sysfs_kf_write+0x1f8/0x278 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x320/0x478 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ac/0x7c4 fs/read_write.c:584 ksys_write+0x120/0x210 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 netdevsim netdevsim8 netdevsim0: renamed from eth0 netdevsim netdevsim8 netdevsim1: renamed from eth1 netdevsim netdevsim8 netdevsim2: renamed from eth2 netdevsim netdevsim8 netdevsim3: renamed from eth3 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 device veth0_vlan entered promiscuous mode device veth1_vlan entered promiscuous mode device veth0_macvtap entered promiscuous mode device veth1_macvtap entered promiscuous mode batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_1 netdevsim netdevsim8 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim8 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim8 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim8 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' ieee80211 phy21: Selected rate control algorithm 'minstrel_ht'