KASAN: slab-use-after-free Read in hci_cmd_work
Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
==================================================================
BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0 net/bluetooth/hci_core.c:4174
Read of size 2 at addr ffff88807912b178 by task kworker/u9:1/5149
CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: hci0 hci_cmd_work
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
hci_cmd_work+0x5d0/0x7b0 net/bluetooth/hci_core.c:4174
process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
process_scheduled_works kernel/workqueue.c:3344 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Allocated by task 51:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
unpoison_slab_object mm/kasan/common.c:339 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:365
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
kmem_cache_alloc_node_noprof+0x43c/0x710 mm/slub.c:5310
__alloc_skb+0x112/0x2d0 net/core/skbuff.c:664
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x3d/0x3b0 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x1a7/0xc70 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:263 [inline]
__hci_cmd_sync_status net/bluetooth/hci_sync.c:287 [inline]
hci_read_bd_addr_sync net/bluetooth/hci_sync.c:3641 [inline]
hci_init_stage_sync net/bluetooth/hci_sync.c:3623 [inline]
hci_init1_sync net/bluetooth/hci_sync.c:3755 [inline]
hci_init_sync net/bluetooth/hci_sync.c:4874 [inline]
hci_dev_init_sync net/bluetooth/hci_sync.c:5066 [inline]
hci_dev_open_sync+0x1756/0x2dc0 net/bluetooth/hci_sync.c:5144
hci_dev_do_open net/bluetooth/hci_core.c:430 [inline]
hci_power_on+0x1b4/0x720 net/bluetooth/hci_core.c:959
process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
process_scheduled_works kernel/workqueue.c:3344 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Freed by task 5891:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2540 [inline]
slab_free mm/slub.c:6663 [inline]
kmem_cache_free+0x197/0x640 mm/slub.c:6774
kfree_skb_reason include/linux/skbuff.h:1322 [inline]
kfree_skb include/linux/skbuff.h:1331 [inline]
vhci_read+0x49a/0x5b0 drivers/bluetooth/hci_vhci.c:593
vfs_read+0x200/0xa30 fs/read_write.c:570
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88807912b140
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 56 bytes inside of
freed 240-byte region [ffff88807912b140, ffff88807912b230)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7912b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881416a7000 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800c000c 00000000f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5149, tgid 5149 (kworker/u9:1), ts 83954148103, free_ts 83898959204
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3920
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5215
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab+0x86/0x3b0 mm/slub.c:3248
new_slab mm/slub.c:3302 [inline]
___slab_alloc+0xf56/0x1990 mm/slub.c:4651
__slab_alloc+0x65/0x100 mm/slub.c:4774
__slab_alloc_node mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:5246 [inline]
kmem_cache_alloc_noprof+0x40f/0x700 mm/slub.c:5265
skb_clone+0x212/0x3a0 net/core/skbuff.c:2069
hci_event_packet+0x3f4/0x1260 net/bluetooth/hci_event.c:7693
hci_rx_work+0x45d/0xfc0 net/bluetooth/hci_core.c:4099
process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
process_scheduled_works kernel/workqueue.c:3344 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
page last free pid 23 tgid 23 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2948
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861
handle_softirqs+0x27d/0x880 kernel/softirq.c:626
run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1067
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Memory state around the buggy address:
ffff88807912b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807912b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
>ffff88807912b100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88807912b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807912b200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
==================================================================
Warning: Permanently added '10.128.0.123' (ED25519) to the list of known hosts.
2025/11/18 20:01:17 parsed 1 programs
[ 76.762077][ T5832] cgroup: Unknown subsys name 'net'
[ 76.892142][ T5832] cgroup: Unknown subsys name 'cpuset'
[ 76.901162][ T5832] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[ 78.378983][ T5832] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 81.223733][ T5844] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[ 82.497155][ T5860] chnl_net:caif_netlink_parms(): no params data found
[ 82.573542][ T5860] bridge0: port 1(bridge_slave_0) entered blocking state
[ 82.581258][ T5860] bridge0: port 1(bridge_slave_0) entered disabled state
[ 82.588772][ T5860] bridge_slave_0: entered allmulticast mode
[ 82.595881][ T5860] bridge_slave_0: entered promiscuous mode
[ 82.605590][ T5860] bridge0: port 2(bridge_slave_1) entered blocking state
[ 82.613216][ T5860] bridge0: port 2(bridge_slave_1) entered disabled state
[ 82.621601][ T5860] bridge_slave_1: entered allmulticast mode
[ 82.628945][ T5860] bridge_slave_1: entered promiscuous mode
[ 82.659933][ T5860] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 82.671752][ T5860] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 82.704217][ T5860] team0: Port device team_slave_0 added
[ 82.712491][ T5860] team0: Port device team_slave_1 added
[ 82.738900][ T5860] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 82.746048][ T5860] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 82.773161][ T5860] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 82.785953][ T5860] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 82.794164][ T5860] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 82.820942][ T5860] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 82.862768][ T5860] hsr_slave_0: entered promiscuous mode
[ 82.869651][ T5860] hsr_slave_1: entered promiscuous mode
[ 83.005933][ T5860] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 83.019731][ T5860] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 83.030171][ T5860] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 83.040986][ T5860] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 83.071236][ T5860] bridge0: port 2(bridge_slave_1) entered blocking state
[ 83.078685][ T5860] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 83.086669][ T5860] bridge0: port 1(bridge_slave_0) entered blocking state
[ 83.093877][ T5860] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 83.151826][ T5860] 8021q: adding VLAN 0 to HW filter on device bond0
[ 83.171295][ T13] bridge0: port 1(bridge_slave_0) entered disabled state
[ 83.180117][ T13] bridge0: port 2(bridge_slave_1) entered disabled state
[ 83.196524][ T5860] 8021q: adding VLAN 0 to HW filter on device team0
[ 83.211219][ T3472] bridge0: port 1(bridge_slave_0) entered blocking state
[ 83.218434][ T3472] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 83.234149][ T3472] bridge0: port 2(bridge_slave_1) entered blocking state
[ 83.241297][ T3472] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 83.404613][ T5860] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 83.449917][ T5860] veth0_vlan: entered promiscuous mode
[ 83.462775][ T5860] veth1_vlan: entered promiscuous mode
[ 83.492993][ T5860] veth0_macvtap: entered promiscuous mode
[ 83.503348][ T5860] veth1_macvtap: entered promiscuous mode
[ 83.523457][ T5860] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 83.537529][ T5860] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 83.554721][ T13] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.566197][ T13] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.575668][ T13] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.586196][ T13] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.724406][ T13] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 83.805326][ T13] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 83.870907][ T13] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 83.935311][ T5149] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 83.945133][ T5149] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 83.954176][ T5149] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 83.962161][ T5149] ==================================================================
[ 83.970240][ T5149] BUG: KASAN: slab-use-after-free in hci_cmd_work+0x5d0/0x7b0
[ 83.977772][ T5149] Read of size 2 at addr ffff88807912b178 by task kworker/u9:1/5149
[ 83.985826][ T5149]
[ 83.988159][ T5149] CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full)
[ 83.988173][ T5149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 83.988181][ T5149] Workqueue: hci0 hci_cmd_work
[ 83.988200][ T5149] Call Trace:
[ 83.988208][ T5149]
[ 83.988212][ T5149] dump_stack_lvl+0x189/0x250
[ 83.988226][ T5149] ? __virt_addr_valid+0x1c8/0x5c0
[ 83.988242][ T5149] ? rcu_is_watching+0x15/0xb0
[ 83.988261][ T5149] ? __pfx_dump_stack_lvl+0x10/0x10
[ 83.988277][ T5149] ? rcu_is_watching+0x15/0xb0
[ 83.988294][ T5149] ? lock_release+0x4b/0x3d0
[ 83.988309][ T5149] ? _raw_spin_lock_irqsave+0xb3/0xf0
[ 83.988328][ T5149] ? __virt_addr_valid+0x1c8/0x5c0
[ 83.988348][ T5149] ? __virt_addr_valid+0x4a5/0x5c0
[ 83.988368][ T5149] print_report+0xca/0x240
[ 83.988388][ T5149] ? hci_cmd_work+0x5d0/0x7b0
[ 83.988402][ T5149] kasan_report+0x118/0x150
[ 83.988420][ T5149] ? hci_cmd_work+0x5d0/0x7b0
[ 83.988439][ T5149] hci_cmd_work+0x5d0/0x7b0
[ 83.988454][ T5149] ? process_one_work+0x868/0x15e0
[ 83.988471][ T5149] process_one_work+0x93a/0x15e0
[ 83.988487][ T5149] ? __lock_acquire+0xab9/0xd20
[ 83.988510][ T5149] ? __pfx_process_one_work+0x10/0x10
[ 83.988528][ T5149] ? assign_work+0x3a1/0x410
[ 83.988544][ T5149] worker_thread+0x9b0/0xee0
[ 83.988569][ T5149] kthread+0x711/0x8a0
[ 83.988589][ T5149] ? __pfx_worker_thread+0x10/0x10
[ 83.988605][ T5149] ? __pfx_kthread+0x10/0x10
[ 83.988625][ T5149] ? _raw_spin_unlock_irq+0x23/0x50
[ 83.988642][ T5149] ? lockdep_hardirqs_on+0x9c/0x150
[ 83.988663][ T5149] ? __pfx_kthread+0x10/0x10
[ 83.988682][ T5149] ret_from_fork+0x599/0xb30
[ 83.988699][ T5149] ? __pfx_ret_from_fork+0x10/0x10
[ 83.988717][ T5149] ? __switch_to_asm+0x39/0x70
[ 83.988735][ T5149] ? __switch_to_asm+0x33/0x70
[ 83.988753][ T5149] ? __pfx_kthread+0x10/0x10
[ 83.988770][ T5149] ret_from_fork_asm+0x1a/0x30
[ 83.988794][ T5149]
[ 83.988800][ T5149]
[ 84.178661][ T5149] Allocated by task 51:
[ 84.182802][ T5149] kasan_save_track+0x3e/0x80
[ 84.187470][ T5149] __kasan_slab_alloc+0x6c/0x80
[ 84.192305][ T5149] kmem_cache_alloc_node_noprof+0x43c/0x710
[ 84.198202][ T5149] __alloc_skb+0x112/0x2d0
[ 84.202607][ T5149] hci_cmd_sync_alloc+0x3d/0x3b0
[ 84.207729][ T5149] __hci_cmd_sync_sk+0x1a7/0xc70
[ 84.212679][ T5149] hci_dev_open_sync+0x1756/0x2dc0
[ 84.217791][ T5149] hci_power_on+0x1b4/0x720
[ 84.222285][ T5149] process_one_work+0x93a/0x15e0
[ 84.227216][ T5149] worker_thread+0x9b0/0xee0
[ 84.231822][ T5149] kthread+0x711/0x8a0
[ 84.235883][ T5149] ret_from_fork+0x599/0xb30
[ 84.240457][ T5149] ret_from_fork_asm+0x1a/0x30
[ 84.245211][ T5149]
[ 84.247532][ T5149] Freed by task 5891:
[ 84.251512][ T5149] kasan_save_track+0x3e/0x80
[ 84.256186][ T5149] kasan_save_free_info+0x46/0x50
[ 84.261299][ T5149] __kasan_slab_free+0x5c/0x80
[ 84.266105][ T5149] kmem_cache_free+0x197/0x640
[ 84.270862][ T5149] vhci_read+0x49a/0x5b0
[ 84.275105][ T5149] vfs_read+0x200/0xa30
[ 84.279274][ T5149] ksys_read+0x145/0x250
[ 84.283498][ T5149] do_syscall_64+0xfa/0xfa0
[ 84.287991][ T5149] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 84.293891][ T5149]
[ 84.296210][ T5149] The buggy address belongs to the object at ffff88807912b140
[ 84.296210][ T5149] which belongs to the cache skbuff_head_cache of size 240
[ 84.310805][ T5149] The buggy address is located 56 bytes inside of
[ 84.310805][ T5149] freed 240-byte region [ffff88807912b140, ffff88807912b230)
[ 84.324512][ T5149]
[ 84.326836][ T5149] The buggy address belongs to the physical page:
[ 84.333246][ T5149] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7912b
[ 84.341996][ T5149] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
[ 84.349273][ T5149] page_type: f5(slab)
[ 84.353249][ T5149] raw: 00fff00000000000 ffff8881416a7000 dead000000000122 0000000000000000
[ 84.361818][ T5149] raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000
[ 84.370380][ T5149] page dumped because: kasan: bad access detected
[ 84.376783][ T5149] page_owner tracks the page as allocated
[ 84.382566][ T5149] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5149, tgid 5149 (kworker/u9:1), ts 83954148103, free_ts 83898959204
[ 84.401827][ T5149] post_alloc_hook+0x240/0x2a0
[ 84.406596][ T5149] get_page_from_freelist+0x2365/0x2440
[ 84.412140][ T5149] __alloc_frozen_pages_noprof+0x181/0x370
[ 84.417940][ T5149] alloc_pages_mpol+0x232/0x4a0
[ 84.422780][ T5149] allocate_slab+0x86/0x3b0
[ 84.427274][ T5149] ___slab_alloc+0xf56/0x1990
[ 84.431938][ T5149] __slab_alloc+0x65/0x100
[ 84.436343][ T5149] kmem_cache_alloc_noprof+0x40f/0x700
[ 84.441793][ T5149] skb_clone+0x212/0x3a0
[ 84.446024][ T5149] hci_event_packet+0x3f4/0x1260
[ 84.450947][ T5149] hci_rx_work+0x45d/0xfc0
[ 84.455353][ T5149] process_one_work+0x93a/0x15e0
[ 84.460293][ T5149] worker_thread+0x9b0/0xee0
[ 84.464934][ T5149] kthread+0x711/0x8a0
[ 84.468988][ T5149] ret_from_fork+0x599/0xb30
[ 84.473570][ T5149] ret_from_fork_asm+0x1a/0x30
[ 84.478320][ T5149] page last free pid 23 tgid 23 stack trace:
[ 84.484280][ T5149] __free_frozen_pages+0xbc8/0xd30
[ 84.489382][ T5149] rcu_core+0xcab/0x1770
[ 84.493645][ T5149] handle_softirqs+0x27d/0x880
[ 84.498484][ T5149] run_ksoftirqd+0x9b/0x100
[ 84.502973][ T5149] smpboot_thread_fn+0x542/0xa60
[ 84.507903][ T5149] kthread+0x711/0x8a0
[ 84.511955][ T5149] ret_from_fork+0x599/0xb30
[ 84.516613][ T5149] ret_from_fork_asm+0x1a/0x30
[ 84.521371][ T5149]
[ 84.523692][ T5149] Memory state around the buggy address:
[ 84.529318][ T5149] ffff88807912b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 84.537367][ T5149] ffff88807912b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
[ 84.545411][ T5149] >ffff88807912b100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[ 84.553463][ T5149] ^
[ 84.561420][ T5149] ffff88807912b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 84.569522][ T5149] ffff88807912b200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
[ 84.577564][ T5149] ==================================================================
[ 84.589891][ T5149] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 84.597220][ T5149] CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full)
[ 84.606680][ T5149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
[ 84.616748][ T5149] Workqueue: hci0 hci_cmd_work
[ 84.621514][ T5149] Call Trace:
[ 84.624787][ T5149]
[ 84.627716][ T5149] dump_stack_lvl+0x99/0x250
[ 84.632304][ T5149] ? __asan_memcpy+0x40/0x70
[ 84.636901][ T5149] ? __pfx_dump_stack_lvl+0x10/0x10
[ 84.642098][ T5149] ? __pfx__printk+0x10/0x10
[ 84.646681][ T5149] vpanic+0x237/0x6d0
[ 84.650648][ T5149] ? __pfx_vpanic+0x10/0x10
[ 84.655134][ T5149] ? preempt_schedule+0xae/0xc0
[ 84.659973][ T5149] ? __pfx_preempt_schedule+0x10/0x10
[ 84.665424][ T5149] panic+0xb9/0xc0
[ 84.669144][ T5149] ? __pfx_panic+0x10/0x10
[ 84.673547][ T5149] ? _raw_spin_unlock_irqrestore+0xfd/0x110
[ 84.679427][ T5149] ? is_module_address+0x17/0xf0
[ 84.684353][ T5149] ? hci_cmd_work+0x5d0/0x7b0
[ 84.689108][ T5149] check_panic_on_warn+0x89/0xb0
[ 84.694039][ T5149] ? hci_cmd_work+0x5d0/0x7b0
[ 84.698796][ T5149] end_report+0x6f/0x160
[ 84.703026][ T5149] kasan_report+0x129/0x150
[ 84.707528][ T5149] ? hci_cmd_work+0x5d0/0x7b0
[ 84.712310][ T5149] hci_cmd_work+0x5d0/0x7b0
[ 84.716803][ T5149] ? process_one_work+0x868/0x15e0
[ 84.721908][ T5149] process_one_work+0x93a/0x15e0
[ 84.726862][ T5149] ? __lock_acquire+0xab9/0xd20
[ 84.731730][ T5149] ? __pfx_process_one_work+0x10/0x10
[ 84.737108][ T5149] ? assign_work+0x3a1/0x410
[ 84.741711][ T5149] worker_thread+0x9b0/0xee0
[ 84.746302][ T5149] kthread+0x711/0x8a0
[ 84.750365][ T5149] ? __pfx_worker_thread+0x10/0x10
[ 84.755468][ T5149] ? __pfx_kthread+0x10/0x10
[ 84.760051][ T5149] ? _raw_spin_unlock_irq+0x23/0x50
[ 84.765238][ T5149] ? lockdep_hardirqs_on+0x9c/0x150
[ 84.770437][ T5149] ? __pfx_kthread+0x10/0x10
[ 84.775024][ T5149] ret_from_fork+0x599/0xb30
[ 84.779604][ T5149] ? __pfx_ret_from_fork+0x10/0x10
[ 84.784708][ T5149] ? __switch_to_asm+0x39/0x70
[ 84.789477][ T5149] ? __switch_to_asm+0x33/0x70
[ 84.794236][ T5149] ? __pfx_kthread+0x10/0x10
[ 84.798902][ T5149] ret_from_fork_asm+0x1a/0x30
[ 84.803663][ T5149]
[ 84.807193][ T5149] Kernel Offset: disabled
[ 84.811510][ T5149] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3725946350=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=)
HEAD detached at 07e030dea
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=07e030dea6e6d9ca88b75bb3be2810f47083b328 -X github.com/google/syzkaller/prog.gitRevisionDate=20251112-115923" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=07e030dea6e6d9ca88b75bb3be2810f47083b328 -X github.com/google/syzkaller/prog.gitRevisionDate=20251112-115923" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=07e030dea6e6d9ca88b75bb3be2810f47083b328 -X github.com/google/syzkaller/prog.gitRevisionDate=20251112-115923" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"07e030dea6e6d9ca88b75bb3be2810f47083b328\"
/usr/bin/ld: /tmp/cciUCEVm.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null