F2FS-fs (loop1): invalid namelen(0), ino:8, run fsck to fix. F2FS-fs (loop1): f2fs_unlink: inode (ino=4) has zero i_nlink ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x104/0x6634 kernel/locking/lockdep.c:4933 Read of size 8 at addr ffff0000dba16540 by task syz-executor/4333 CPU: 1 PID: 4333 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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+0xf4/0x15c lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0xfc mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 __lock_acquire+0x104/0x6634 kernel/locking/lockdep.c:4933 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] bt_accept_unlink+0x5c/0x270 net/bluetooth/af_bluetooth.c:262 l2cap_sock_teardown_cb+0x148/0x364 net/bluetooth/l2cap_sock.c:1668 l2cap_chan_del+0x9c/0x494 net/bluetooth/l2cap_core.c:695 l2cap_conn_del+0x2c8/0x564 net/bluetooth/l2cap_core.c:1833 l2cap_disconn_cfm+0x90/0xdc net/bluetooth/l2cap_core.c:7641 hci_disconn_cfm include/net/bluetooth/hci_core.h:1855 [inline] hci_conn_hash_flush+0x108/0x26c net/bluetooth/hci_conn.c:2549 hci_dev_close_sync+0x890/0x10b8 net/bluetooth/hci_sync.c:5293 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x218/0x4d4 net/bluetooth/hci_core.c:2733 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19ac kernel/exit.c:887 do_group_exit+0x198/0x238 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1039 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 Allocated by task 9529: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] io_ring_ctx_alloc+0x5c/0x9c0 io_uring/io_uring.c:266 io_uring_create+0x1f8/0xb34 io_uring/io_uring.c:3637 io_uring_setup io_uring/io_uring.c:3793 [inline] __do_sys_io_uring_setup io_uring/io_uring.c:3799 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:3796 [inline] __arm64_sys_io_uring_setup+0x2a4/0x2e8 io_uring/io_uring.c:3796 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 insert_work+0x64/0x37c kernel/workqueue.c:1361 __queue_work+0xd00/0x1280 kernel/workqueue.c:1520 queue_work_on+0xc0/0x164 kernel/workqueue.c:1548 queue_work include/linux/workqueue.h:512 [inline] io_ring_ctx_wait_and_kill+0x25c/0x2c0 io_uring/io_uring.c:2970 io_uring_release+0x44/0x58 io_uring/io_uring.c:2978 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19ac kernel/exit.c:887 do_group_exit+0x198/0x238 kernel/exit.c:1030 get_signal+0x11f4/0x133c kernel/signal.c:2880 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x364/0x2c84 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0x104/0x958 kernel/rcu/tree.c:2849 netlink_release+0x12dc/0x177c net/netlink/af_netlink.c:799 __sock_release net/socket.c:654 [inline] sock_close+0xac/0x1ec net/socket.c:1400 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000dba16000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1344 bytes inside of 2048-byte region [ffff0000dba16000, ffff0000dba16800) The buggy address belongs to the physical page: page:00000000f9cf73db refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000dba12000 pfn:0x11ba10 head:00000000f9cf73db order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003449808 fffffc00035bbe08 ffff0000c0002900 raw: ffff0000dba12000 0000000000080003 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dba16400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dba16480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000dba16500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000dba16580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dba16600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 1 PID: 4333 Comm: syz-executor Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 assign_lock_key+0x230/0x264 kernel/locking/lockdep.c:974 register_lock_class+0x1ac/0x690 kernel/locking/lockdep.c:1287 __lock_acquire+0x164/0x6634 kernel/locking/lockdep.c:4942 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] bt_accept_unlink+0x5c/0x270 net/bluetooth/af_bluetooth.c:262 l2cap_sock_teardown_cb+0x148/0x364 net/bluetooth/l2cap_sock.c:1668 l2cap_chan_del+0x9c/0x494 net/bluetooth/l2cap_core.c:695 l2cap_conn_del+0x2c8/0x564 net/bluetooth/l2cap_core.c:1833 l2cap_disconn_cfm+0x90/0xdc net/bluetooth/l2cap_core.c:7641 hci_disconn_cfm include/net/bluetooth/hci_core.h:1855 [inline] hci_conn_hash_flush+0x108/0x26c net/bluetooth/hci_conn.c:2549 hci_dev_close_sync+0x890/0x10b8 net/bluetooth/hci_sync.c:5293 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x218/0x4d4 net/bluetooth/hci_core.c:2733 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19ac kernel/exit.c:887 do_group_exit+0x198/0x238 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1039 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 ================================================================================ UBSAN: array-index-out-of-bounds in kernel/locking/qspinlock.c:131:9 index 1538 is out of range for type 'unsigned long[8]' CPU: 1 PID: 4333 Comm: syz-executor Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 ubsan_epilogue+0x14/0x48 lib/ubsan.c:151 __ubsan_handle_out_of_bounds+0xd0/0xf8 lib/ubsan.c:282 decode_tail kernel/locking/qspinlock.c:131 [inline] queued_spin_lock_slowpath+0x8a8/0xc14 kernel/locking/qspinlock.c:471 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2f4/0x2f8 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x5c/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] bt_accept_unlink+0x5c/0x270 net/bluetooth/af_bluetooth.c:262 l2cap_sock_teardown_cb+0x148/0x364 net/bluetooth/l2cap_sock.c:1668 l2cap_chan_del+0x9c/0x494 net/bluetooth/l2cap_core.c:695 l2cap_conn_del+0x2c8/0x564 net/bluetooth/l2cap_core.c:1833 l2cap_disconn_cfm+0x90/0xdc net/bluetooth/l2cap_core.c:7641 hci_disconn_cfm include/net/bluetooth/hci_core.h:1855 [inline] hci_conn_hash_flush+0x108/0x26c net/bluetooth/hci_conn.c:2549 hci_dev_close_sync+0x890/0x10b8 net/bluetooth/hci_sync.c:5293 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x218/0x4d4 net/bluetooth/hci_core.c:2733 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19ac kernel/exit.c:887 do_group_exit+0x198/0x238 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1039 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 ================================================================================ Unable to handle kernel paging request at virtual address ffff80001530b1b0 KASAN: probably user-memory-access in range [0x00000000a9858d80-0x00000000a9858d87] Mem abort info: ESR = 0x0000000096000047 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000047 CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000020dd40000 [ffff80001530b1b0] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000023fff9003, pte=0000000000000000 Internal error: Oops: 0000000096000047 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4333 Comm: syz-executor Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x598/0xc14 kernel/locking/qspinlock.c:474 lr : decode_tail kernel/locking/qspinlock.c:131 [inline] lr : queued_spin_lock_slowpath+0x8a8/0xc14 kernel/locking/qspinlock.c:471 sp : ffff800020d77560 x29: ffff800020d77600 x28: 1fffe00033e74a30 x27: ffff80001530b1b0 x26: ffff00019f3a5188 x25: ffff800020d77580 x24: 1fffe0001b742ca5 x23: dfff800000000000 x22: ffff7000041aeeb0 x21: ffff80001530b1b0 x20: ffff00019f3a5180 x19: ffff0000dba16528 x18: 1fffe00033e7217e x17: 3d3d3d3d3d3d3d3d x16: ffff800008195560 x15: 3d3d3d3d3d3d3d3d x14: ffff700002ff42bc x13: 1ffff00002ff42bc x12: 0000000000000004 x11: ff008000081955e4 x10: ffff80001530b180 x9 : 0000000000000003 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020d76fb8 x4 : ffff800015484e80 x3 : ffff8000081955ac x2 : 0000000000000001 x1 : 0000000000000004 x0 : ffff00019f3a5188 Call trace: queued_spin_lock_slowpath+0x598/0xc14 kernel/locking/qspinlock.c:477 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2f4/0x2f8 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x5c/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] bt_accept_unlink+0x5c/0x270 net/bluetooth/af_bluetooth.c:262 l2cap_sock_teardown_cb+0x148/0x364 net/bluetooth/l2cap_sock.c:1668 l2cap_chan_del+0x9c/0x494 net/bluetooth/l2cap_core.c:695 l2cap_conn_del+0x2c8/0x564 net/bluetooth/l2cap_core.c:1833 l2cap_disconn_cfm+0x90/0xdc net/bluetooth/l2cap_core.c:7641 hci_disconn_cfm include/net/bluetooth/hci_core.h:1855 [inline] hci_conn_hash_flush+0x108/0x26c net/bluetooth/hci_conn.c:2549 hci_dev_close_sync+0x890/0x10b8 net/bluetooth/hci_sync.c:5293 hci_dev_do_close net/bluetooth/hci_core.c:528 [inline] hci_unregister_dev+0x218/0x4d4 net/bluetooth/hci_core.c:2733 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __fput+0x1b4/0x7b0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1f4/0x280 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x54c/0x19ac kernel/exit.c:887 do_group_exit+0x198/0x238 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1039 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 Code: aa1503e0 978dba34 91002280 52800081 (f90002b4) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1503e0 mov x0, x21 4: 978dba34 bl 0xfffffffffe36e8d4 8: 91002280 add x0, x20, #0x8 c: 52800081 mov w1, #0x4 // #4 * 10: f90002b4 str x20, [x21] <-- trapping instruction