Unable to handle kernel paging request at virtual address dfff80000000000b KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] 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 [dfff80000000000b] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 8045 Comm: syz-executor Not tainted 6.15.0-rc1-syzkaller-g2fe2b96c3818 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : klist_put lib/klist.c:212 [inline] pc : klist_del lib/klist.c:230 [inline] pc : klist_remove+0x190/0x3c8 lib/klist.c:249 lr : spin_unlock include/linux/spinlock.h:391 [inline] lr : klist_remove+0x16c/0x3c8 lib/klist.c:247 sp : ffff8000a4af72c0 x29: ffff8000a4af7370 x28: 1ffff0001263cf5c x27: 1fffe000194994e3 x26: ffff0000cb3c9e80 x25: dfff800000000000 x24: ffff70001495ee58 x23: ffff8000933e5308 x22: 1fffe0002203028c x21: 0000000000000000 x20: ffff8000a4af72e0 x19: ffff000110181460 x18: 1fffe000366e22b6 x17: 00000000fffffffa x16: ffff8000803c3924 x15: 0000000000000001 x14: 1ffff0001267ca54 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000000000 x9 : 1fffe000196793d1 x8 : 000000000000000b x7 : ffff80008b9130b4 x6 : 0000000000000000 x5 : ffff800093e8eb90 x4 : 0000000000000008 x3 : ffff8000804900b4 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000058 Call trace: klist_put lib/klist.c:212 [inline] (P) klist_del lib/klist.c:230 [inline] (P) klist_remove+0x190/0x3c8 lib/klist.c:249 (P) device_move+0x17c/0x5c8 drivers/base/core.c:4592 hci_conn_del_sysfs+0xb8/0x174 net/bluetooth/hci_sysfs.c:75 hci_conn_cleanup net/bluetooth/hci_conn.c:175 [inline] hci_conn_del+0x740/0xab4 net/bluetooth/hci_conn.c:1167 hci_conn_hash_flush+0x184/0x220 net/bluetooth/hci_conn.c:2702 hci_dev_close_sync+0x8a4/0x1158 net/bluetooth/hci_sync.c:5225 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline] hci_unregister_dev+0x1f8/0x4b8 net/bluetooth/hci_core.c:2678 vhci_release+0x7c/0xd0 drivers/bluetooth/hci_vhci.c:665 __fput+0x340/0x760 fs/file_table.c:465 ____fput+0x20/0x58 fs/file_table.c:493 task_work_run+0x230/0x2e0 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x4e8/0x1a20 kernel/exit.c:953 do_group_exit+0x194/0x22c kernel/exit.c:1102 get_signal+0x13e4/0x1500 kernel/signal.c:3034 do_signal+0x22c/0x39f0 arch/arm64/kernel/signal.c:1615 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: f9400268 927ff915 910162a0 d343fc08 (38796908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f9400268 ldr x8, [x19] 4: 927ff915 and x21, x8, #0xfffffffffffffffe 8: 910162a0 add x0, x21, #0x58 c: d343fc08 lsr x8, x0, #3 * 10: 38796908 ldrb w8, [x8, x25] <-- trapping instruction