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BUG: KASAN: slab-use-after-free in sk_filter_trim_cap+0x270/0xa80 net/core/filter.c:156
Read of size 8 at addr ffff88807aac4178 by task syz.2.268/6981

CPU: 0 UID: 0 PID: 6981 Comm: syz.2.268 Not tainted 6.12.0-rc5-syzkaller-01053-gdbb9a7ef3478 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 sk_filter_trim_cap+0x270/0xa80 net/core/filter.c:156
 sk_filter include/linux/filter.h:1062 [inline]
 sock_queue_rcv_skb_reason+0x28/0xf0 net/core/sock.c:520
 sock_queue_rcv_skb include/net/sock.h:2396 [inline]
 mgmt_cmd_status+0x28d/0x4d0 net/bluetooth/mgmt_util.c:156
 cmd_status_rsp net/bluetooth/mgmt.c:1450 [inline]
 cmd_complete_rsp+0x114/0x180 net/bluetooth/mgmt.c:1470
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
 __mgmt_power_off+0x183/0x430 net/bluetooth/mgmt.c:9474
 hci_dev_close_sync+0x6c4/0x11c0 net/bluetooth/hci_sync.c:5201
 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+0x158/0x460 net/socket.c:1227
 sock_ioctl+0x626/0x8e0 net/socket.c:1346
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f15bff7e719
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:00007f15c0dfd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f15c0135f80 RCX: 00007f15bff7e719
RDX: 0000000000000000 RSI: 00000000400448ca RDI: 0000000000000006
RBP: 00007f15bfff132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f15c0135f80 R15: 00007ffd74395b48
 </TASK>

Allocated by task 6625:
 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+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:257 [inline]
 __do_kmalloc_node mm/slub.c:4264 [inline]
 __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4276
 kmalloc_noprof include/linux/slab.h:882 [inline]
 sk_prot_alloc+0xe0/0x210 net/core/sock.c:2159
 sk_alloc+0x38/0x370 net/core/sock.c:2212
 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148
 hci_sock_create+0xa1/0x190 net/bluetooth/hci_sock.c:2202
 bt_sock_create+0x161/0x230 net/bluetooth/af_bluetooth.c:132
 __sock_create+0x4c0/0xa30 net/socket.c:1576
 sock_create net/socket.c:1634 [inline]
 __sys_socket_create net/socket.c:1671 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1718
 __do_sys_socket net/socket.c:1732 [inline]
 __se_sys_socket net/socket.c:1730 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1730
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6982:
 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:579
 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:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free mm/slub.c:4579 [inline]
 kfree+0x1a0/0x440 mm/slub.c:4727
 sk_prot_free net/core/sock.c:2195 [inline]
 __sk_destruct+0x479/0x5f0 net/core/sock.c:2287
 sock_put include/net/sock.h:1904 [inline]
 mgmt_pending_free net/bluetooth/mgmt_util.c:307 [inline]
 mgmt_pending_remove+0x13e/0x1a0 net/bluetooth/mgmt_util.c:315
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
 mgmt_index_removed+0x133/0x390 net/bluetooth/mgmt.c:9407
 hci_sock_bind+0xcce/0x1150 net/bluetooth/hci_sock.c:1307
 __sys_bind_socket net/socket.c:1845 [inline]
 __sys_bind+0x22d/0x2d0 net/socket.c:1869
 __do_sys_bind net/socket.c:1877 [inline]
 __se_sys_bind net/socket.c:1875 [inline]
 __x64_sys_bind+0x7a/0x90 net/socket.c:1875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88807aac4000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 376 bytes inside of
 freed 2048-byte region [ffff88807aac4000, ffff88807aac4800)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7aac0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac42000 0000000000000000 dead000000000001
head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0001eab001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5844, tgid 5844 (syz-executor), ts 64040511477, free_ts 63987376312
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 alloc_slab_page+0x6a/0x120 mm/slub.c:2412
 allocate_slab+0x5a/0x2f0 mm/slub.c:2578
 new_slab mm/slub.c:2631 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
 __slab_alloc+0x58/0xa0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 __kmalloc_cache_node_noprof+0x20c/0x300 mm/slub.c:4303
 kmalloc_node_noprof include/linux/slab.h:901 [inline]
 page_pool_create_percpu+0x77/0xa00 net/core/page_pool.c:335
 nsim_create_page_pool drivers/net/netdevsim/netdev.c:374 [inline]
 nsim_init_napi drivers/net/netdevsim/netdev.c:399 [inline]
 nsim_open+0x381/0x800 drivers/net/netdevsim/netdev.c:436
 __dev_open+0x2d3/0x450 net/core/dev.c:1476
 __dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8904
 dev_change_flags+0x8b/0x1a0 net/core/dev.c:8976
 do_setlink+0xc90/0x4210 net/core/rtnetlink.c:3043
 rtnl_changelink net/core/rtnetlink.c:3646 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3767 [inline]
 rtnl_newlink+0xeec/0x1550 net/core/rtnetlink.c:3887
page last free pid 5844 tgid 5844 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
 discard_slab mm/slub.c:2677 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:3145
 put_cpu_partial+0x17c/0x250 mm/slub.c:3220
 __slab_free+0x2ea/0x3d0 mm/slub.c:4449
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 __do_kmalloc_node mm/slub.c:4263 [inline]
 __kmalloc_node_track_caller_noprof+0x1cd/0x440 mm/slub.c:4283
 kstrdup+0x3a/0x80 mm/util.c:64
 device_rename+0xb6/0x200 drivers/base/core.c:4523
 dev_change_name+0x2bd/0x920 net/core/dev.c:1250
 do_setlink+0xa25/0x4210 net/core/rtnetlink.c:3023
 rtnl_changelink net/core/rtnetlink.c:3646 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3767 [inline]
 rtnl_newlink+0xeec/0x1550 net/core/rtnetlink.c:3887
 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6799
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357

Memory state around the buggy address:
 ffff88807aac4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807aac4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807aac4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88807aac4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807aac4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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