==================================================================
BUG: KASAN: use-after-free in hci_cmd_timeout+0x24b/0x250 net/bluetooth/hci_core.c:1486
Read of size 2 at addr ffff888018386408 by task kworker/1:7/10906

CPU: 1 PID: 10906 Comm: kworker/1:7 Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: events hci_cmd_timeout
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x6e9 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 hci_cmd_timeout+0x24b/0x250 net/bluetooth/hci_core.c:1486
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 3657:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:525
 kmalloc_reserve net/core/skbuff.c:362 [inline]
 __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:434
 alloc_skb include/linux/skbuff.h:1257 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:469 [inline]
 hci_cmd_sync_alloc net/bluetooth/hci_sync.c:54 [inline]
 hci_cmd_sync_add net/bluetooth/hci_sync.c:95 [inline]
 __hci_cmd_sync_sk+0x568/0xe20 net/bluetooth/hci_sync.c:157
 __hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:246 [inline]
 __hci_cmd_sync_status net/bluetooth/hci_sync.c:271 [inline]
 hci_read_local_features_sync+0xca/0x1e0 net/bluetooth/hci_sync.c:2906
 hci_init_stage_sync net/bluetooth/hci_sync.c:2817 [inline]
 hci_init1_sync net/bluetooth/hci_sync.c:3000 [inline]
 hci_init_sync net/bluetooth/hci_sync.c:4075 [inline]
 hci_dev_init_sync net/bluetooth/hci_sync.c:4263 [inline]
 hci_dev_open_sync+0x177b/0x2190 net/bluetooth/hci_sync.c:4343
 hci_dev_do_open+0x2d/0x70 net/bluetooth/hci_core.c:483
 hci_power_on+0xda/0x620 net/bluetooth/hci_core.c:975
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Freed by task 3657:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x13d/0x1a0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 __cache_free mm/slab.c:3418 [inline]
 kfree+0x173/0x390 mm/slab.c:3786
 skb_free_head+0xac/0x110 net/core/skbuff.c:662
 skb_release_data+0x5f1/0x870 net/core/skbuff.c:691
 skb_release_all net/core/skbuff.c:756 [inline]
 __kfree_skb net/core/skbuff.c:770 [inline]
 kfree_skb_reason.part.0+0xdd/0x320 net/core/skbuff.c:792
 kfree_skb_reason+0x85/0x110 include/linux/refcount.h:279
 kfree_skb include/linux/skbuff.h:1206 [inline]
 hci_dev_open_sync+0xbe2/0x2190 net/bluetooth/hci_sync.c:4377
 hci_dev_do_open+0x2d/0x70 net/bluetooth/hci_core.c:483
 hci_power_on+0xda/0x620 net/bluetooth/hci_core.c:975
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff888018386400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 512-byte region [ffff888018386400, ffff888018386600)

The buggy address belongs to the physical page:
page:ffffea000060e180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18386
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00012ac288 ffffea0000713208 ffff888011840600
raw: 0000000000000000 ffff888018386000 0000000100000004 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 0x2c2220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_THISNODE), pid 21, tgid 21 (ksoftirqd/1), ts 109902204317, free_ts 93767371917
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5515
 __alloc_pages_node include/linux/gfp.h:243 [inline]
 kmem_getpages mm/slab.c:1363 [inline]
 cache_grow_begin+0x75/0x360 mm/slab.c:2569
 cache_alloc_refill+0x27f/0x380 mm/slab.c:2942
 ____cache_alloc mm/slab.c:3018 [inline]
 ____cache_alloc mm/slab.c:3001 [inline]
 slab_alloc_node mm/slab.c:3220 [inline]
 kmem_cache_alloc_node_trace+0x50a/0x570 mm/slab.c:3601
 __do_kmalloc_node mm/slab.c:3623 [inline]
 __kmalloc_node_track_caller+0x38/0x60 mm/slab.c:3638
 kmalloc_reserve net/core/skbuff.c:362 [inline]
 __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:434
 __napi_alloc_skb+0x93/0x340 net/core/skbuff.c:575
 napi_alloc_skb include/linux/skbuff.h:3207 [inline]
 page_to_skb+0x17d/0xc10 drivers/net/virtio_net.c:496
 receive_mergeable drivers/net/virtio_net.c:1119 [inline]
 receive_buf+0xe0a/0x5530 drivers/net/virtio_net.c:1258
 virtnet_receive drivers/net/virtio_net.c:1553 [inline]
 virtnet_poll+0x708/0x1310 drivers/net/virtio_net.c:1671
 __napi_poll+0xb3/0x6d0 net/core/dev.c:6511
 napi_poll net/core/dev.c:6578 [inline]
 net_rx_action+0x9c1/0xd90 net/core/dev.c:6689
 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
 slab_destroy mm/slab.c:1615 [inline]
 slabs_destroy+0x89/0xc0 mm/slab.c:1635
 cache_flusharray mm/slab.c:3389 [inline]
 ___cache_free+0x2a8/0x3d0 mm/slab.c:3452
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x4f/0x1b0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slab.c:3232 [inline]
 kmem_cache_alloc_node+0x2f1/0x560 mm/slab.c:3583
 __alloc_skb+0x210/0x2f0 net/core/skbuff.c:422
 alloc_skb_fclone include/linux/skbuff.h:1307 [inline]
 tcp_stream_alloc_skb+0x38/0x580 net/ipv4/tcp.c:861
 tcp_sendmsg_locked+0xc36/0x2f80 net/ipv4/tcp.c:1325
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1483
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 sock_write_iter+0x291/0x3d0 net/socket.c:1108
 call_write_iter include/linux/fs.h:2187 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9e9/0xdd0 fs/read_write.c:578

Memory state around the buggy address:
 ffff888018386300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888018386380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888018386400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff888018386480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888018386500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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