last executing test programs:
kernel console output (not intermixed with test programs):
Warning: Permanently added '10.128.1.151' (ED25519) to the list of known hosts.
[ 71.361973][ T5810] cgroup: Unknown subsys name 'net'
[ 71.503118][ T5810] cgroup: Unknown subsys name 'cpuset'
[ 71.512794][ T5810] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[ 72.876619][ T5810] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 74.851263][ T52] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 74.861590][ T5823] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 74.869851][ T5823] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 74.878852][ T5823] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 74.886479][ T5823] ==================================================================
[ 74.894753][ T5823] BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0
[ 74.902250][ T5823] Read of size 2 at addr ffff88805ca45538 by task kworker/u9:2/5823
[ 74.910250][ T5823]
[ 74.912684][ T5823] CPU: 1 UID: 0 PID: 5823 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full)
[ 74.912707][ T5823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 74.912720][ T5823] Workqueue: hci0 hci_cmd_work
[ 74.912750][ T5823] Call Trace:
[ 74.912758][ T5823]
[ 74.912766][ T5823] dump_stack_lvl+0x189/0x250
[ 74.912795][ T5823] ? __virt_addr_valid+0x1c8/0x5c0
[ 74.912814][ T5823] ? rcu_is_watching+0x15/0xb0
[ 74.912832][ T5823] ? __pfx_dump_stack_lvl+0x10/0x10
[ 74.912858][ T5823] ? rcu_is_watching+0x15/0xb0
[ 74.912875][ T5823] ? lock_release+0x4b/0x3d0
[ 74.912898][ T5823] ? _raw_spin_lock_irqsave+0xb3/0xf0
[ 74.912919][ T5823] ? __virt_addr_valid+0x1c8/0x5c0
[ 74.912938][ T5823] ? __virt_addr_valid+0x4a5/0x5c0
[ 74.912958][ T5823] print_report+0xca/0x240
[ 74.912982][ T5823] ? hci_cmd_work+0x5d0/0x7b0
[ 74.913011][ T5823] kasan_report+0x118/0x150
[ 74.913037][ T5823] ? hci_cmd_work+0x5d0/0x7b0
[ 74.913065][ T5823] hci_cmd_work+0x5d0/0x7b0
[ 74.913089][ T5823] ? process_one_work+0x868/0x15e0
[ 74.913112][ T5823] process_one_work+0x93a/0x15e0
[ 74.913135][ T5823] ? __lock_acquire+0xab9/0xd20
[ 74.913166][ T5823] ? __pfx_process_one_work+0x10/0x10
[ 74.913193][ T5823] ? assign_work+0x3a1/0x410
[ 74.913218][ T5823] worker_thread+0x9b0/0xee0
[ 74.913252][ T5823] kthread+0x711/0x8a0
[ 74.913271][ T5823] ? __pfx_worker_thread+0x10/0x10
[ 74.913295][ T5823] ? __pfx_kthread+0x10/0x10
[ 74.913313][ T5823] ? _raw_spin_unlock_irq+0x23/0x50
[ 74.913331][ T5823] ? lockdep_hardirqs_on+0x9c/0x150
[ 74.913351][ T5823] ? __pfx_kthread+0x10/0x10
[ 74.913368][ T5823] ret_from_fork+0x599/0xb30
[ 74.913393][ T5823] ? __pfx_ret_from_fork+0x10/0x10
[ 74.913420][ T5823] ? __switch_to_asm+0x39/0x70
[ 74.913438][ T5823] ? __switch_to_asm+0x33/0x70
[ 74.913456][ T5823] ? __pfx_kthread+0x10/0x10
[ 74.913473][ T5823] ret_from_fork_asm+0x1a/0x30
[ 74.913499][ T5823]
[ 74.913506][ T5823]
[ 75.104626][ T5823] Allocated by task 5147:
[ 75.108948][ T5823] kasan_save_track+0x3e/0x80
[ 75.113639][ T5823] __kasan_slab_alloc+0x6c/0x80
[ 75.118593][ T5823] kmem_cache_alloc_node_noprof+0x43c/0x710
[ 75.124482][ T5823] __alloc_skb+0x112/0x2d0
[ 75.128901][ T5823] hci_cmd_sync_alloc+0x3d/0x3b0
[ 75.133846][ T5823] __hci_cmd_sync_sk+0x1a7/0xc70
[ 75.138789][ T5823] hci_read_local_name_sync+0x2c/0x120
[ 75.144336][ T5823] hci_dev_open_sync+0x230e/0x2dc0
[ 75.149443][ T5823] hci_power_on+0x1b4/0x720
[ 75.153950][ T5823] process_one_work+0x93a/0x15e0
[ 75.158893][ T5823] worker_thread+0x9b0/0xee0
[ 75.163493][ T5823] kthread+0x711/0x8a0
[ 75.167558][ T5823] ret_from_fork+0x599/0xb30
[ 75.172234][ T5823] ret_from_fork_asm+0x1a/0x30
[ 75.177058][ T5823]
[ 75.179375][ T5823] Freed by task 5822:
[ 75.183678][ T5823] kasan_save_track+0x3e/0x80
[ 75.188445][ T5823] kasan_save_free_info+0x46/0x50
[ 75.193556][ T5823] __kasan_slab_free+0x5c/0x80
[ 75.198318][ T5823] kmem_cache_free+0x197/0x640
[ 75.203251][ T5823] vhci_read+0x49a/0x5b0
[ 75.207494][ T5823] vfs_read+0x200/0xa30
[ 75.211743][ T5823] ksys_read+0x145/0x250
[ 75.215989][ T5823] do_syscall_64+0xfa/0xfa0
[ 75.220577][ T5823] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 75.226553][ T5823]
[ 75.228876][ T5823] The buggy address belongs to the object at ffff88805ca45500
[ 75.228876][ T5823] which belongs to the cache skbuff_head_cache of size 240
[ 75.243634][ T5823] The buggy address is located 56 bytes inside of
[ 75.243634][ T5823] freed 240-byte region [ffff88805ca45500, ffff88805ca455f0)
[ 75.257342][ T5823]
[ 75.259666][ T5823] The buggy address belongs to the physical page:
[ 75.266244][ T5823] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5ca45
[ 75.275123][ T5823] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
[ 75.282259][ T5823] page_type: f5(slab)
[ 75.286337][ T5823] raw: 00fff00000000000 ffff88801deeca00 dead000000000122 0000000000000000
[ 75.295012][ T5823] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000
[ 75.304111][ T5823] page dumped because: kasan: bad access detected
[ 75.310542][ T5823] page_owner tracks the page as allocated
[ 75.316267][ T5823] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5823, tgid 5823 (kworker/u9:2), ts 74878649472, free_ts 24250165668
[ 75.335989][ T5823] post_alloc_hook+0x240/0x2a0
[ 75.340780][ T5823] get_page_from_freelist+0x2365/0x2440
[ 75.346413][ T5823] __alloc_frozen_pages_noprof+0x181/0x370
[ 75.352326][ T5823] alloc_pages_mpol+0x232/0x4a0
[ 75.357183][ T5823] allocate_slab+0x86/0x3b0
[ 75.361778][ T5823] ___slab_alloc+0xf56/0x1990
[ 75.366515][ T5823] __slab_alloc+0x65/0x100
[ 75.370930][ T5823] kmem_cache_alloc_noprof+0x40f/0x700
[ 75.376386][ T5823] skb_clone+0x212/0x3a0
[ 75.380716][ T5823] hci_cmd_work+0x2f7/0x7b0
[ 75.385321][ T5823] process_one_work+0x93a/0x15e0
[ 75.390257][ T5823] worker_thread+0x9b0/0xee0
[ 75.394846][ T5823] kthread+0x711/0x8a0
[ 75.399030][ T5823] ret_from_fork+0x599/0xb30
[ 75.403622][ T5823] ret_from_fork_asm+0x1a/0x30
[ 75.408397][ T5823] page last free pid 1 tgid 1 stack trace:
[ 75.414367][ T5823] __free_frozen_pages+0xbc8/0xd30
[ 75.419483][ T5823] free_contig_range+0x1bd/0x4a0
[ 75.424424][ T5823] destroy_args+0x69/0x660
[ 75.428925][ T5823] debug_vm_pgtable+0x38f/0x3a0
[ 75.433776][ T5823] do_one_initcall+0x1fb/0x870
[ 75.438710][ T5823] do_initcall_level+0x104/0x190
[ 75.443825][ T5823] do_initcalls+0x59/0xa0
[ 75.448329][ T5823] kernel_init_freeable+0x334/0x4b0
[ 75.453528][ T5823] kernel_init+0x1d/0x1d0
[ 75.457863][ T5823] ret_from_fork+0x599/0xb30
[ 75.462543][ T5823] ret_from_fork_asm+0x1a/0x30
[ 75.467491][ T5823]
[ 75.469980][ T5823] Memory state around the buggy address:
[ 75.475961][ T5823] ffff88805ca45400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 75.484372][ T5823] ffff88805ca45480: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
[ 75.492427][ T5823] >ffff88805ca45500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 75.500489][ T5823] ^
[ 75.506461][ T5823] ffff88805ca45580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
[ 75.514602][ T5823] ffff88805ca45600: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
[ 75.522654][ T5823] ==================================================================
[ 75.532581][ T5823] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 75.539927][ T5823] CPU: 1 UID: 0 PID: 5823 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full)
[ 75.549669][ T5823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 75.559724][ T5823] Workqueue: hci0 hci_cmd_work
[ 75.564766][ T5823] Call Trace:
[ 75.568133][ T5823]
[ 75.571068][ T5823] dump_stack_lvl+0x99/0x250
[ 75.575666][ T5823] ? __asan_memcpy+0x40/0x70
[ 75.580253][ T5823] ? __pfx_dump_stack_lvl+0x10/0x10
[ 75.585464][ T5823] ? __pfx__printk+0x10/0x10
[ 75.590066][ T5823] vpanic+0x237/0x6d0
[ 75.594155][ T5823] ? __pfx_vpanic+0x10/0x10
[ 75.598650][ T5823] ? preempt_schedule+0xae/0xc0
[ 75.603498][ T5823] ? __pfx_preempt_schedule+0x10/0x10
[ 75.608867][ T5823] panic+0xb9/0xc0
[ 75.612586][ T5823] ? __pfx_panic+0x10/0x10
[ 75.616996][ T5823] ? _raw_spin_unlock_irqrestore+0xfd/0x110
[ 75.622888][ T5823] ? is_module_address+0x17/0xf0
[ 75.627824][ T5823] ? hci_cmd_work+0x5d0/0x7b0
[ 75.632603][ T5823] check_panic_on_warn+0x89/0xb0
[ 75.637652][ T5823] ? hci_cmd_work+0x5d0/0x7b0
[ 75.642337][ T5823] end_report+0x6f/0x160
[ 75.646584][ T5823] kasan_report+0x129/0x150
[ 75.651101][ T5823] ? hci_cmd_work+0x5d0/0x7b0
[ 75.655868][ T5823] hci_cmd_work+0x5d0/0x7b0
[ 75.660390][ T5823] ? process_one_work+0x868/0x15e0
[ 75.665507][ T5823] process_one_work+0x93a/0x15e0
[ 75.670536][ T5823] ? __lock_acquire+0xab9/0xd20
[ 75.675399][ T5823] ? __pfx_process_one_work+0x10/0x10
[ 75.680780][ T5823] ? assign_work+0x3a1/0x410
[ 75.685376][ T5823] worker_thread+0x9b0/0xee0
[ 75.689979][ T5823] kthread+0x711/0x8a0
[ 75.694098][ T5823] ? __pfx_worker_thread+0x10/0x10
[ 75.699232][ T5823] ? __pfx_kthread+0x10/0x10
[ 75.703934][ T5823] ? _raw_spin_unlock_irq+0x23/0x50
[ 75.709242][ T5823] ? lockdep_hardirqs_on+0x9c/0x150
[ 75.714453][ T5823] ? __pfx_kthread+0x10/0x10
[ 75.719040][ T5823] ret_from_fork+0x599/0xb30
[ 75.723642][ T5823] ? __pfx_ret_from_fork+0x10/0x10
[ 75.728933][ T5823] ? __switch_to_asm+0x39/0x70
[ 75.733796][ T5823] ? __switch_to_asm+0x33/0x70
[ 75.738650][ T5823] ? __pfx_kthread+0x10/0x10
[ 75.743413][ T5823] ret_from_fork_asm+0x1a/0x30
[ 75.748185][ T5823]
[ 75.751627][ T5823] Kernel Offset: disabled
[ 75.756126][ T5823] Rebooting in 86400 seconds..