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BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x31/0x190 lib/list_debug.c:49
Read of size 8 at addr ffff88801d078088 by task syz.0.0/5326

CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-13443-g56f944529ec2 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 __list_del_entry_valid_or_report+0x31/0x190 lib/list_debug.c:49
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 mgmt_pending_remove+0x26/0x1a0 net/bluetooth/mgmt_util.c:297
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:242
 __mgmt_power_off+0x18b/0x440 net/bluetooth/mgmt.c:9429
 hci_dev_close_sync+0x701/0x1260 net/bluetooth/hci_sync.c:5221
 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline]
 hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:508
 sock_do_ioctl+0x15a/0x490 net/socket.c:1190
 sock_ioctl+0x644/0x900 net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff7978d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007eff7a6b1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007eff799a5fa0 RCX: 00007eff7978d169
RDX: 0000000000000000 RSI: 00000000400448ca RDI: 0000000000000004
RBP: 00007eff7980e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007eff799a5fa0 R15: 00007ffd6f1fa468
 </TASK>

Allocated by task 5327:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x236/0x370 mm/slub.c:4362
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 mgmt_pending_new+0x65/0x250 net/bluetooth/mgmt_util.c:252
 mgmt_pending_add+0x36/0x120 net/bluetooth/mgmt_util.c:279
 set_link_security+0x61e/0x860 net/bluetooth/mgmt.c:1909
 hci_mgmt_cmd+0xa2e/0xf20 net/bluetooth/hci_sock.c:1712
 hci_sock_sendmsg+0x7b8/0x11f0 net/bluetooth/hci_sock.c:1832
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:727
 sock_write_iter+0x2d9/0x3f0 net/socket.c:1131
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x70f/0xd10 fs/read_write.c:684
 ksys_write+0x19d/0x2d0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5327:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2389 [inline]
 slab_free mm/slub.c:4646 [inline]
 kfree+0x198/0x430 mm/slub.c:4845
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:242
 mgmt_index_removed+0x135/0x3a0 net/bluetooth/mgmt.c:9362
 hci_sock_bind+0xd74/0x12d0 net/bluetooth/hci_sock.c:1307
 __sys_bind_socket net/socket.c:1810 [inline]
 __sys_bind+0x1de/0x290 net/socket.c:1841
 __do_sys_bind net/socket.c:1846 [inline]
 __se_sys_bind net/socket.c:1844 [inline]
 __x64_sys_bind+0x7a/0x90 net/socket.c:1844
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801d078080
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 8 bytes inside of
 freed 96-byte region [ffff88801d078080, ffff88801d0780e0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d078
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041280 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5327, tgid 5325 (syz.0.0), ts 67877257445, free_ts 66182794905
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1717
 prep_new_page mm/page_alloc.c:1725 [inline]
 get_page_from_freelist+0x352b/0x36c0 mm/page_alloc.c:3652
 __alloc_pages_slowpath+0x436/0x1080 mm/page_alloc.c:4473
 __alloc_frozen_pages_noprof+0x40d/0x5b0 mm/page_alloc.c:4947
 alloc_slab_page mm/slub.c:2461 [inline]
 allocate_slab+0x66/0x3a0 mm/slub.c:2623
 new_slab mm/slub.c:2676 [inline]
 ___slab_alloc+0xc3b/0x1500 mm/slub.c:3862
 __slab_alloc+0x58/0xa0 mm/slub.c:3952
 __slab_alloc_node mm/slub.c:4027 [inline]
 slab_alloc_node mm/slub.c:4188 [inline]
 __do_kmalloc_node mm/slub.c:4330 [inline]
 __kmalloc_node_noprof+0x2f4/0x4d0 mm/slub.c:4337
 kmalloc_array_node_noprof include/linux/slab.h:1020 [inline]
 alloc_slab_obj_exts+0x3a/0xa0 mm/slub.c:1987
 __memcg_slab_post_alloc_hook+0x31c/0x7e0 mm/memcontrol.c:3075
 memcg_slab_post_alloc_hook mm/slub.c:2188 [inline]
 slab_post_alloc_hook mm/slub.c:4161 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_noprof+0x28f/0x390 mm/slub.c:4207
 alloc_empty_file+0x56/0x1d0 fs/file_table.c:234
 alloc_file fs/file_table.c:351 [inline]
 alloc_file_pseudo+0x206/0x320 fs/file_table.c:380
 sock_alloc_file+0xb7/0x2e0 net/socket.c:470
 sock_map_fd net/socket.c:500 [inline]
 __sys_socket+0x1dc/0x3c0 net/socket.c:1692
 __do_sys_socket net/socket.c:1697 [inline]
 __se_sys_socket net/socket.c:1695 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1695
page last free pid 1050 tgid 1050 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xde8/0x10a0 mm/page_alloc.c:2680
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2824
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
 do_softirq+0x11f/0x1e0 kernel/softirq.c:480
 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:407
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x312/0x3b0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88801d077f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801d078000: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
>ffff88801d078080: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                      ^
 ffff88801d078100: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88801d078180: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
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