------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 3170 at kernel/locking/lockdep.c:231 check_wait_context kernel/locking/lockdep.c:4727 [inline] WARNING: CPU: 1 PID: 3170 at kernel/locking/lockdep.c:231 __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 Modules linked in: CPU: 1 PID: 3170 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4727 [inline] pc : __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 lr : hlock_class kernel/locking/lockdep.c:231 [inline] lr : check_wait_context kernel/locking/lockdep.c:4727 [inline] lr : __lock_acquire+0x298/0x30a4 kernel/locking/lockdep.c:5003 sp : ffff80001297b820 x29: ffff80001297b900 x28: 0000000000000001 x27: ffff0000c10e4fa8 x26: ffff0000c869fa78 x25: ffff0000c10e59d8 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000000 x19: aaaaaa0000f8f1e6 x18: 00000000000001fe x17: 0000000000000008 x16: ffff80000db49158 x15: ffff0000c10e4f80 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d5ef920 x11: ff808000081c0d5c x10: ffff80000dd0b198 x9 : 08038478f58ad500 x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff80000819545c x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000001 x0 : 0000000000000016 Call trace: check_wait_context kernel/locking/lockdep.c:4727 [inline] __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __mutex_lock_common+0xd4/0xca8 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 tee_netdev_event+0x54/0x1a8 net/netfilter/xt_TEE.c:68 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x7c/0x108 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10250 [inline] netdev_run_todo+0x340/0x6f0 net/core/dev.c:10364 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:147 tun_detach drivers/net/tun.c:704 [inline] tun_chr_close+0xe8/0xfc drivers/net/tun.c:3455 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x26c/0xbe0 kernel/exit.c:795 do_group_exit+0x60/0xe8 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __wake_up_parent+0x0/0x40 kernel/exit.c:934 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 10798097 hardirqs last enabled at (10798097): [] __local_bh_enable_ip+0x13c/0x1a4 kernel/softirq.c:401 hardirqs last disabled at (10798095): [] __local_bh_enable_ip+0xc4/0x1a4 kernel/softirq.c:378 softirqs last enabled at (10798096): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (10798096): [] rt_flush_dev+0x32c/0x374 net/ipv4/route.c:1557 softirqs last disabled at (10798094): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (10798094): [] rt_flush_dev+0x114/0x374 net/ipv4/route.c:1548 ---[ end trace 0000000000000000 ]--- Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000105e6f000 [00000000000000b8] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3170 Comm: syz-executor.3 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4727 [inline] pc : __lock_acquire+0x2d0/0x30a4 kernel/locking/lockdep.c:5003 lr : hlock_class kernel/locking/lockdep.c:231 [inline] lr : check_wait_context kernel/locking/lockdep.c:4727 [inline] lr : __lock_acquire+0x298/0x30a4 kernel/locking/lockdep.c:5003 sp : ffff80001297b820 x29: ffff80001297b900 x28: 0000000000000001 x27: ffff0000c10e4fa8 x26: ffff0000c869fa78 x25: ffff0000c10e59d8 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000000 x19: aaaaaa0000f8f1e6 x18: 00000000000001fe x17: 0000000000000008 x16: ffff80000db49158 x15: ffff0000c10e4f80 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d5ef920 x11: ff808000081c0d5c x10: ffff80000dd0b198 x9 : 00000000000411e6 x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff80000819545c x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000001 x0 : 0000000000000016 Call trace: hlock_class kernel/locking/lockdep.c:222 [inline] check_wait_context kernel/locking/lockdep.c:4728 [inline] __lock_acquire+0x2d0/0x30a4 kernel/locking/lockdep.c:5003 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __mutex_lock_common+0xd4/0xca8 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 tee_netdev_event+0x54/0x1a8 net/netfilter/xt_TEE.c:68 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x7c/0x108 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10250 [inline] netdev_run_todo+0x340/0x6f0 net/core/dev.c:10364 rtnl_unlock+0x14/0x20 net/core/rtnetlink.c:147 tun_detach drivers/net/tun.c:704 [inline] tun_chr_close+0xe8/0xfc drivers/net/tun.c:3455 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x26c/0xbe0 kernel/exit.c:795 do_group_exit+0x60/0xe8 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __wake_up_parent+0x0/0x40 kernel/exit.c:934 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: b002db8a 91056210 9106614a b9400329 (3942e114) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: b002db8a adrp x10, 0x5b71000 4: 91056210 add x16, x16, #0x158 8: 9106614a add x10, x10, #0x198 c: b9400329 ldr w9, [x25] * 10: 3942e114 ldrb w20, [x8, #184] <-- trapping instruction