Bluetooth: hci0: Opcode 0x0c1a failed: -4
Bluetooth: hci0: Error when powering off device on rfkill (-4)
Bluetooth: hci5: Opcode 0x0c1a failed: -4
Bluetooth: hci5: Error when powering off device on rfkill (-4)
==================================================================
BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x92/0x190 lib/list_debug.c:62
Read of size 8 at addr ffff88805baae780 by task syz.7.1688/12289

CPU: 1 UID: 0 PID: 12289 Comm: syz.7.1688 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 __list_del_entry_valid_or_report+0x92/0x190 lib/list_debug.c:62
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del_init include/linux/list.h:295 [inline]
 bt_accept_unlink+0x39/0x260 net/bluetooth/af_bluetooth.c:259
 l2cap_sock_teardown_cb+0x17e/0x490 net/bluetooth/l2cap_sock.c:1640
 l2cap_chan_del+0xb5/0x610 net/bluetooth/l2cap_core.c:656
 l2cap_conn_del+0x33d/0x570 net/bluetooth/l2cap_core.c:1802
 hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]
 hci_conn_hash_flush+0x10d/0x260 net/bluetooth/hci_conn.c:2644
 hci_dev_close_sync+0x821/0x10e0 net/bluetooth/hci_sync.c:5358
 hci_dev_do_close+0x30/0xc0 net/bluetooth/hci_core.c:502
 hci_rfkill_set_block+0x1f4/0x290 net/bluetooth/hci_core.c:930
 rfkill_set_block+0x1e5/0x450 net/rfkill/core.c:346
 rfkill_fop_write+0x464/0x5a0 net/rfkill/core.c:1301
 vfs_write+0x2a3/0xba0 fs/read_write.c:686
 ksys_write+0x156/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ce0c8c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9cdeede028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9ce0f05fa0 RCX: 00007f9ce0c8c799
RDX: 0000000000000008 RSI: 0000200000000300 RDI: 0000000000000003
RBP: 00007f9ce0d22c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9ce0f06038 R14: 00007f9ce0f05fa0 R15: 00007ffc12e3ab58
 </TASK>

Allocated by task 12076:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5260 [inline]
 __kmalloc_node_track_caller_noprof+0x372/0x7e0 mm/slub.c:5368
 kmalloc_reserve net/core/skbuff.c:635 [inline]
 pskb_expand_head+0x228/0x1320 net/core/skbuff.c:2315
 netlink_trim+0x1b3/0x2c0 net/netlink/af_netlink.c:1299
 netlink_broadcast_filtered+0xd6/0x1010 net/netlink/af_netlink.c:1512
 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
 nlmsg_multicast include/net/netlink.h:1184 [inline]
 nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2593
 __dev_notify_flags+0xf2/0x310 net/core/dev.c:9811
 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9844
 do_setlink+0xf82/0x4590 net/core/rtnetlink.c:3180
 rtnl_changelink net/core/rtnetlink.c:3798 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x15a9/0x1be0 net/core/rtnetlink.c:4094
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6980
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x831/0x9f0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x67f/0x710 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 12076:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2685 [inline]
 slab_free mm/slub.c:6165 [inline]
 kfree+0x1c1/0x6c0 mm/slub.c:6483
 skb_kfree_head net/core/skbuff.c:1089 [inline]
 skb_free_head net/core/skbuff.c:1101 [inline]
 skb_release_data+0x6f0/0x940 net/core/skbuff.c:1128
 skb_release_all net/core/skbuff.c:1203 [inline]
 __kfree_skb+0x5d/0x210 net/core/skbuff.c:1217
 netlink_broadcast_filtered+0xede/0x1010 net/netlink/af_netlink.c:1535
 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
 nlmsg_multicast include/net/netlink.h:1184 [inline]
 nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2593
 __dev_notify_flags+0xf2/0x310 net/core/dev.c:9811
 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9844
 do_setlink+0xf82/0x4590 net/core/rtnetlink.c:3180
 rtnl_changelink net/core/rtnetlink.c:3798 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x15a9/0x1be0 net/core/rtnetlink.c:4094
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6980
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x831/0x9f0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0x67f/0x710 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88805baae000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1920 bytes inside of
 freed 2048-byte region [ffff88805baae000, ffff88805baae800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805baac000 pfn:0x5baa8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000240(workingset|head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000240 ffff88813fe1a000 ffffea0000a07e10 ffffea0000a04210
raw: ffff88805baac000 0000000800080007 00000000f5000000 0000000000000000
head: 0080000000000240 ffff88813fe1a000 ffffea0000a07e10 ffffea0000a04210
head: ffff88805baac000 0000000800080007 00000000f5000000 0000000000000000
head: 0080000000000003 ffffea00016eaa01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5809, tgid 5809 (syz-executor), ts 89061837644, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x28bb/0x2950 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_slab_page mm/slub.c:3292 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3481
 new_slab mm/slub.c:3539 [inline]
 refill_objects+0x334/0x3c0 mm/slub.c:7175
 refill_sheaf mm/slub.c:2812 [inline]
 __pcs_replace_empty_main+0x35c/0x710 mm/slub.c:4615
 alloc_from_pcs mm/slub.c:4717 [inline]
 slab_alloc_node mm/slub.c:4851 [inline]
 __do_kmalloc_node mm/slub.c:5259 [inline]
 __kmalloc_node_track_caller_noprof+0x60b/0x7e0 mm/slub.c:5368
 kmalloc_reserve net/core/skbuff.c:635 [inline]
 pskb_expand_head+0x228/0x1320 net/core/skbuff.c:2315
 netlink_trim+0x1b3/0x2c0 net/netlink/af_netlink.c:1299
 netlink_broadcast_filtered+0xd6/0x1010 net/netlink/af_netlink.c:1512
 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
 nlmsg_multicast include/net/netlink.h:1184 [inline]
 nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2593
 __dev_notify_flags+0xf2/0x310 net/core/dev.c:9811
 rtnl_configure_link net/core/rtnetlink.c:3628 [inline]
 rtnl_newlink_create+0x657/0xb70 net/core/rtnetlink.c:3872
 __rtnl_newlink net/core/rtnetlink.c:3979 [inline]
 rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4094
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6980
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88805baae680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805baae700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805baae780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88805baae800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805baae880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================