Bluetooth: hci6: Opcode 0x1003 failed: -110
==================================================================
BUG: KASAN: use-after-free in hci_cmd_timeout+0x239/0x250 net/bluetooth/hci_core.c:1494
Read of size 8 at addr ffff88807f32c0d8 by task kworker/u5:0/19716

CPU: 0 PID: 19716 Comm: kworker/u5:0 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: hci7 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/0x719 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 3656:
 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+0x90/0xc0 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_node mm/slub.c:3248 [inline]
 slab_alloc mm/slub.c:3256 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3263 [inline]
 kmem_cache_alloc+0x267/0x3b0 mm/slub.c:3273
 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 3647:
 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+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kmem_cache_free+0xeb/0x5b0 mm/slub.c:3556
 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 ffff88807f32c000
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 216 bytes inside of
 240-byte region [ffff88807f32c000, ffff88807f32c0f0)

The buggy address belongs to the physical page:
page:ffffea0001fccb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f32c
memcg:ffff88801d4ce881
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888012744500
raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff88801d4ce881
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 3699, tgid 3699 (kworker/0:7), ts 351757543768, free_ts 351449569161
 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+0x1a6/0x270 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:1829 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x84f/0xe80 mm/slub.c:3036
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
 slab_alloc_node mm/slub.c:3214 [inline]
 kmem_cache_alloc_node+0x11d/0x3f0 mm/slub.c:3298
 __alloc_skb+0x210/0x2f0 net/core/skbuff.c:497
 alloc_skb include/linux/skbuff.h:1265 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:742 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:799 [inline]
 nsim_dev_trap_report_work+0x2ad/0xc50 drivers/net/netdevsim/dev.c:844
 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
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_list+0x16f/0xb90 mm/page_alloc.c:3522
 release_pages+0xbd3/0x1400 mm/swap.c:1012
 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:58
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu mm/mmu_gather.c:262 [inline]
 tlb_finish_mmu+0x147/0x7e0 mm/mmu_gather.c:353
 exit_mmap+0x1d2/0x490 mm/mmap.c:3118
 __mmput+0x122/0x4b0 kernel/fork.c:1187
 mmput+0x56/0x60 kernel/fork.c:1208
 exit_mm kernel/exit.c:510 [inline]
 do_exit+0xa33/0x2a20 kernel/exit.c:800
 do_group_exit+0xd0/0x2a0 kernel/exit.c:943
 get_signal+0x21a1/0x2430 kernel/signal.c:2858
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807f32bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88807f32c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807f32c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
                                                    ^
 ffff88807f32c100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88807f32c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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