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BUG: KASAN: slab-use-after-free in hci_cmd_timeout+0x216/0x260 net/bluetooth/hci_core.c:1522
Read of size 2 at addr ffff88802adbd578 by task kworker/u33:1/4638

CPU: 0 PID: 4638 Comm: kworker/u33:1 Not tainted 6.9.0-syzkaller-11952-gc760b3725e52 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: hci0 hci_cmd_timeout
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 hci_cmd_timeout+0x216/0x260 net/bluetooth/hci_core.c:1522
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5235:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4000 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4007
 skb_clone+0x190/0x3f0 net/core/skbuff.c:2052
 hci_send_cmd_sync net/bluetooth/hci_core.c:4123 [inline]
 hci_cmd_work+0x66a/0x710 net/bluetooth/hci_core.c:4143
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 7073:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2195 [inline]
 slab_free mm/slub.c:4436 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4511
 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131
 __kfree_skb net/core/skbuff.c:1188 [inline]
 kfree_skb_reason+0x138/0x210 net/core/skbuff.c:1223
 kfree_skb include/linux/skbuff.h:1257 [inline]
 __hci_req_sync+0x61d/0x980 net/bluetooth/hci_request.c:184
 hci_req_sync+0x97/0xd0 net/bluetooth/hci_request.c:206
 hci_inquiry+0x3ea/0x950 net/bluetooth/hci_core.c:427
 hci_sock_ioctl+0x2bb/0x880 net/bluetooth/hci_sock.c:1153
 sock_do_ioctl+0x116/0x280 net/socket.c:1222
 sock_ioctl+0x22e/0x6c0 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802adbd540
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 56 bytes inside of
 freed 240-byte region [ffff88802adbd540, ffff88802adbd630)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2adbc
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff88801632a780 ffffea0000afb480 dead000000000003
raw: 0000000000000000 0000000000190019 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff88801632a780 ffffea0000afb480 dead000000000003
head: 0000000000000000 0000000000190019 00000001ffffefff 0000000000000000
head: 00fff00000000001 ffffea0000ab6f01 ffffffffffffffff 0000000000000000
head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5242, tgid 5242 (syz-executor.2), ts 63314970987, free_ts 63108435516
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x56/0x110 mm/slub.c:2264
 allocate_slab mm/slub.c:2427 [inline]
 new_slab+0x84/0x260 mm/slub.c:2480
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756
 __slab_alloc_node mm/slub.c:3809 [inline]
 slab_alloc_node mm/slub.c:3988 [inline]
 kmem_cache_alloc_node_noprof+0xed/0x310 mm/slub.c:4043
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:656
 alloc_skb include/linux/skbuff.h:1308 [inline]
 alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289
 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:413 [inline]
 kobject_uevent_env+0x11a5/0x1810 lib/kobject_uevent.c:593
 rx_queue_add_kobject net/core/net-sysfs.c:1120 [inline]
 net_rx_queue_update_kobjects+0x17a/0x5f0 net/core/net-sysfs.c:1160
 register_queue_kobjects net/core/net-sysfs.c:1895 [inline]
 netdev_register_kobject+0x26d/0x3f0 net/core/net-sysfs.c:2140
 register_netdevice+0x12ce/0x1cb0 net/core/dev.c:10374
 veth_newlink+0x4f6/0xa10 drivers/net/veth.c:1860
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink+0x1197/0x1960 net/core/rtnetlink.c:3730
page last free pid 5233 tgid 5233 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2565
 __put_partials+0x14c/0x170 mm/slub.c:2994
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4000 [inline]
 kmalloc_trace_noprof+0x11e/0x310 mm/slub.c:4147
 kmalloc_noprof include/linux/slab.h:660 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 kobject_uevent_env+0x265/0x1810 lib/kobject_uevent.c:525
 __kobject_del+0x168/0x1f0 lib/kobject.c:601
 kobject_cleanup lib/kobject.c:680 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x31c/0x5b0 lib/kobject.c:737
 netdev_queue_update_kobjects+0x4a2/0x640 net/core/net-sysfs.c:1854
 netif_set_real_num_tx_queues+0x168/0x880 net/core/dev.c:2940
 veth_init_queues+0xe1/0x190 drivers/net/veth.c:1755
 veth_newlink+0x546/0xa10 drivers/net/veth.c:1872
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink+0x1197/0x1960 net/core/rtnetlink.c:3730
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743
 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595

Memory state around the buggy address:
 ffff88802adbd400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802adbd480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
>ffff88802adbd500: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
                                                                ^
 ffff88802adbd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802adbd600: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
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