Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 ================================================================== BUG: KASAN: slab-use-after-free in sco_conn_free net/bluetooth/sco.c:87 [inline] BUG: KASAN: slab-use-after-free in kref_put include/linux/kref.h:65 [inline] BUG: KASAN: slab-use-after-free in sco_conn_put+0xac/0x224 net/bluetooth/sco.c:107 Write of size 8 at addr ffff0000dc6795a0 by task syz.4.334/8121 CPU: 0 UID: 0 PID: 8121 Comm: syz.4.334 Not tainted 6.14.0-rc3-syzkaller-ga1c24ab82279 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x198/0x538 mm/kasan/report.c:489 kasan_report+0xd8/0x138 mm/kasan/report.c:602 __asan_report_store8_noabort+0x20/0x2c mm/kasan/report_generic.c:386 sco_conn_free net/bluetooth/sco.c:87 [inline] kref_put include/linux/kref.h:65 [inline] sco_conn_put+0xac/0x224 net/bluetooth/sco.c:107 sco_conn_del+0x204/0x468 net/bluetooth/sco.c:263 sco_connect_cfm+0xb4/0x8f4 net/bluetooth/sco.c:1417 hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] hci_conn_failed+0x228/0x3c0 net/bluetooth/hci_conn.c:1266 hci_conn_unlink+0x308/0x4b0 net/bluetooth/hci_conn.c:1103 hci_conn_del+0x60/0xaa4 net/bluetooth/hci_conn.c:1129 hci_conn_failed+0x29c/0x3c0 net/bluetooth/hci_conn.c:1267 hci_abort_conn_sync+0x50c/0xff0 net/bluetooth/hci_sync.c:5588 hci_disconnect_all_sync+0x220/0x410 net/bluetooth/hci_sync.c:5611 hci_suspend_sync+0x448/0xb84 net/bluetooth/hci_sync.c:6088 hci_suspend_dev+0x1e4/0x3d0 net/bluetooth/hci_core.c:2811 hci_suspend_notifier+0xc8/0x278 net/bluetooth/hci_core.c:2391 notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85 notifier_call_chain_robust kernel/notifier.c:120 [inline] blocking_notifier_call_chain_robust+0xdc/0x1bc kernel/notifier.c:345 pm_notifier_call_chain_robust+0x34/0x64 kernel/power/main.c:102 snapshot_open+0x184/0x270 kernel/power/user.c:77 misc_open+0x2b8/0x328 drivers/char/misc.c:179 chrdev_open+0x3b0/0x4bc fs/char_dev.c:414 do_dentry_open+0xb7c/0x1538 fs/open.c:956 vfs_open+0x48/0x2d8 fs/open.c:1086 do_open fs/namei.c:3830 [inline] path_openat+0x2308/0x2b1c fs/namei.c:3989 do_filp_open+0x1e8/0x404 fs/namei.c:4016 do_sys_openat2+0x124/0x1b8 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Allocated by task 6057: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x254/0x410 mm/slub.c:4171 getname_flags+0xcc/0x4b4 fs/namei.c:139 getname+0x24/0x34 fs/namei.c:223 do_sys_openat2+0xd0/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Freed by task 6057: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x64/0x8c mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x198/0x554 mm/slub.c:4711 putname+0x130/0x184 fs/namei.c:296 do_sys_openat2+0x164/0x1b8 fs/open.c:1436 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the object at ffff0000dc679100 which belongs to the cache names_cache of size 4096 The buggy address is located 1184 bytes inside of freed 4096-byte region [ffff0000dc679100, ffff0000dc67a100) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11c678 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c18a88c0 fffffdffc35b7c00 dead000000000002 raw: 0000000000000000 0000000000070007 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c18a88c0 fffffdffc35b7c00 dead000000000002 head: 0000000000000000 0000000000070007 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc3719e01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dc679480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dc679500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000dc679580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000dc679600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dc679680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Bluetooth: hci4: Opcode 0x0406 failed: -4