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BUG: KASAN: use-after-free in hci_cmd_timeout+0x239/0x250 net/bluetooth/hci_core.c:1494
Read of size 8 at addr ffff8880228f6258 by task kworker/u5:6/3654

CPU: 1 PID: 3654 Comm: kworker/u5:6 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: hci6 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+0x239/0x250 net/bluetooth/hci_core.c:1494
 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 48:
 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_slab_alloc+0x85/0xb0 mm/kasan/common.c:470
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc mm/slab.c:3294 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3471 [inline]
 kmem_cache_alloc+0x214/0x520 mm/slab.c:3491
 skb_clone+0x16e/0x3c0 net/core/skbuff.c:1650
 hci_cmd_work+0x191/0x570 net/bluetooth/hci_core.c:4080
 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]
 kmem_cache_free.part.0+0x10f/0x2e0 mm/slab.c:3725
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:812
 __kfree_skb net/core/skbuff.c:869 [inline]
 kfree_skb_reason+0x15b/0x410 net/core/skbuff.c:891
 kfree_skb include/linux/skbuff.h:1214 [inline]
 hci_dev_open_sync+0xbec/0x21a0 net/bluetooth/hci_sync.c:4699
 hci_dev_do_open+0x2d/0x70 net/bluetooth/hci_core.c:483
 hci_power_on+0xda/0x620 net/bluetooth/hci_core.c:984
 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 ffff8880228f6180
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 216 bytes inside of
 240-byte region [ffff8880228f6180, ffff8880228f6270)

The buggy address belongs to the physical page:
page:ffffea00008a3d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x228f6
memcg:ffff88801f3bf781
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000726408 ffffea0000936d88 ffff888016b21d00
raw: 0000000000000000 ffff8880228f6040 000000010000000c ffff88801f3bf781
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x242220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 3603, tgid 3603 (syz-fuzzer), ts 78550288603, free_ts 72590240767
 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:5549
 __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]
 __do_cache_alloc mm/slab.c:3246 [inline]
 slab_alloc mm/slab.c:3287 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3471 [inline]
 kmem_cache_alloc+0x433/0x520 mm/slab.c:3491
 __build_skb+0x21/0x60 net/core/skbuff.c:322
 build_skb+0x1e/0x280 net/core/skbuff.c:339
 page_to_skb+0x636/0xc80 drivers/net/virtio_net.c:482
 receive_mergeable drivers/net/virtio_net.c:1119 [inline]
 receive_buf+0xe0a/0x5580 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:6494
 napi_poll net/core/dev.c:6561 [inline]
 net_rx_action+0x9c1/0xd90 net/core/dev.c:6672
 __do_softirq+0x1d0/0x9c8 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 mm/slab.c:3294 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3471 [inline]
 kmem_cache_alloc+0x214/0x520 mm/slab.c:3491
 vm_area_dup+0x88/0x3f0 kernel/fork.c:467
 __split_vma+0xa5/0x550 mm/mmap.c:2688
 __do_munmap+0xd03/0x10b0 mm/mmap.c:2808
 do_munmap mm/mmap.c:2847 [inline]
 munmap_vma_range mm/mmap.c:562 [inline]
 mmap_region+0x1d8/0x1460 mm/mmap.c:1707
 do_mmap+0x863/0xfa0 mm/mmap.c:1540
 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:552
 ksys_mmap_pgoff+0x79/0x5a0 mm/mmap.c:1586
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80

Memory state around the buggy address:
 ffff8880228f6100: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
 ffff8880228f6180: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880228f6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
                                                    ^
 ffff8880228f6280: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880228f6300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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