------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 8958 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4773 [inline] WARNING: CPU: 0 PID: 8958 at kernel/locking/lockdep.c:232 __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 Modules linked in: CPU: 0 PID: 8958 Comm: kbnepd bnep0 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 604010c5 (nZCv daIF +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4773 [inline] pc : __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 lr : hlock_class kernel/locking/lockdep.c:232 [inline] lr : check_wait_context kernel/locking/lockdep.c:4773 [inline] lr : __lock_acquire+0x780/0x763c kernel/locking/lockdep.c:5087 sp : ffff8000987272c0 x29: ffff800098727580 x28: ffff0000cc9bbc80 x27: ffff0000cc9bc788 x26: 1fffe000199378f1 x25: ffff0000cc9bc6f0 x24: 0000000000000001 x23: 0000000000000003 x22: 0000000000001df5 x21: ffff8000924bc7b8 x20: 0000000000000000 x19: ffff0000cc9bc78c x18: 0000000000000008 x17: 0000000000000000 x16: ffff80008ae725bc x15: 0000000000000001 x14: 1fffe000367b9602 x13: 0000000000000000 x12: dfff800000000000 x11: 0000000000000003 x10: 0000000000ff0100 x9 : 8484f82778db8800 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800098726a38 x4 : ffff80008ef650a0 x3 : ffff8000805e616c x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000000 Call trace: check_wait_context kernel/locking/lockdep.c:4773 [inline] __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 klist_next+0x8c/0x2e4 lib/klist.c:382 next_device drivers/base/core.c:3970 [inline] device_for_each_child+0xc0/0x174 drivers/base/core.c:4048 pm_runtime_set_memalloc_noio+0xf0/0x210 drivers/base/power/runtime.c:248 netdev_unregister_kobject+0x148/0x208 net/core/net-sysfs.c:2106 unregister_netdevice_many_notify+0x117c/0x1770 net/core/dev.c:11129 unregister_netdevice_many net/core/dev.c:11157 [inline] unregister_netdevice_queue net/core/dev.c:11036 [inline] unregister_netdevice include/linux/netdevice.h:3115 [inline] unregister_netdev+0x180/0x1f8 net/core/dev.c:11175 bnep_session+0x23bc/0x257c net/bluetooth/bnep/core.c:525 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 9402 hardirqs last enabled at (9401): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (9401): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (9402): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (9402): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (9230): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (9230): [] netif_addr_unlock_bh include/linux/netdevice.h:4534 [inline] softirqs last enabled at (9230): [] dev_mc_flush+0x1b4/0x1f8 net/core/dev_addr_lists.c:1036 softirqs last disabled at (9228): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address dfff800000000018 KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000018] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 8958 Comm: kbnepd bnep0 Tainted: G W 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 604010c5 (nZCv daIF +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4773 [inline] pc : __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087 lr : hlock_class kernel/locking/lockdep.c:232 [inline] lr : check_wait_context kernel/locking/lockdep.c:4773 [inline] lr : __lock_acquire+0x780/0x763c kernel/locking/lockdep.c:5087 sp : ffff8000987272c0 x29: ffff800098727580 x28: ffff0000cc9bbc80 x27: ffff0000cc9bc788 x26: 1fffe000199378f1 x25: ffff0000cc9bc6f0 x24: 0000000000000001 x23: 0000000000000003 x22: 0000000000001df5 x21: ffff8000924bc7b8 x20: 0000000000000000 x19: 00000000000000c4 x18: 0000000000000008 x17: 0000000000000000 x16: ffff80008ae725bc x15: 0000000000000001 x14: 1fffe000367b9602 x13: 0000000000000000 x12: dfff800000000000 x11: 0000000000000003 x10: 0000000000ff0100 x9 : 8484f82778db8800 x8 : 0000000000000018 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800098726a38 x4 : ffff80008ef650a0 x3 : ffff8000805e616c x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000000 Call trace: check_wait_context kernel/locking/lockdep.c:4773 [inline] __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 klist_next+0x8c/0x2e4 lib/klist.c:382 next_device drivers/base/core.c:3970 [inline] device_for_each_child+0xc0/0x174 drivers/base/core.c:4048 pm_runtime_set_memalloc_noio+0xf0/0x210 drivers/base/power/runtime.c:248 netdev_unregister_kobject+0x148/0x208 net/core/net-sysfs.c:2106 unregister_netdevice_many_notify+0x117c/0x1770 net/core/dev.c:11129 unregister_netdevice_many net/core/dev.c:11157 [inline] unregister_netdevice_queue net/core/dev.c:11036 [inline] unregister_netdevice include/linux/netdevice.h:3115 [inline] unregister_netdev+0x180/0x1f8 net/core/dev.c:11175 bnep_session+0x23bc/0x257c net/bluetooth/bnep/core.c:525 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Code: 34000ee8 aa1f03e8 91031113 d343fe68 (38ec6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 34000ee8 cbz w8, 0x1dc 4: aa1f03e8 mov x8, xzr 8: 91031113 add x19, x8, #0xc4 c: d343fe68 lsr x8, x19, #3 * 10: 38ec6908 ldrsb w8, [x8, x12] <-- trapping instruction